Related
I wonder if I have found a reason why GPS was not offered in the past year..
Since playing with the new radio and OS ROMs, the internal GPS on my phone has been consistently flawless. Indoor (wood frame house) and outdoor 5~30s lock ons to 3-8 satellites out of a visible 10.
A few weeks ago I got my dad the same Telus phone and this evening moved it also to the latest radio and DCD's 2.2.1. BUT, it can only perceive a maximum of 7 satellites and retain a much weaker and extremely intermittent lock to 1-3 satellites. When first activated with visualGPS, the signal strength and satellite recognition seems to be stronger for the first 5-10 seconds but then quickly drops off to rather poor levels. If the app is shut-down, I wait ~15 seconds and restart it then it returns with the same weakening performance model. This is all the while with my phone (identical ROMs) is close by but providing exceptional reception.
In the other thread concerning GPS performance there are some people complaining about the apparent "worthlessness" of the internal GPS. Possibly they aren't doing anything wrong but lost out on a crapshoot for a GPS viable Titan.
Checking in the EPST (reliable and significant? I'm still learning..), the hardware version of my phone is 0003 and the PRI Version (?) 1.15_010. In the next few days I'll head back to my Dad's to see if his phone states anything different.
GPS is working great on my Telus P4000 with the 2.2.3 ROM. Little jumpy in steel-and-concrete buildings and among the downtown buildings, but it's got a lock everywhere I've tried it.
Soundy106 said:
GPS is working great on my Telus P4000 with the 2.2.3 ROM. Little jumpy in steel-and-concrete buildings and among the downtown buildings, but it's got a lock everywhere I've tried it.
Click to expand...
Click to collapse
Yes, most seem to work well. But I think this is the first opportunity to test one of the phones with apparent weak GPS issues side-by-side with another that's working fine and has an identical (sprite backup image) software configuration.
After the ROM update, as mine, my dad's phone was updated on the Telus network via *228032. It was also left outside for 30 minutes to see if it could better survey and lock on to the satellites. I can't think of any software or settings discrepancies between the two that could cause such a difference in performance.
Tomorrow or Wednesday I'll again try out quickGPS and check if his EPST states any different hardware revision.
It's appears to be definite that my dad's Titan is subpar compared to mine with the internal GPS. It's EPST hardware revisons are identical to mine, so there is no visible difference between the phone.
I just again tried quickGPS with no difference in reception.
Keystone said:
It's appears to be definite that my dad's Titan is subpar compared to mine with the internal GPS. It's EPST hardware revisons are identical to mine, so there is no visible difference between the phone.
I just again tried quickGPS with no difference in reception.
Click to expand...
Click to collapse
please remember that this is still a "BETA" rom. it is not publicly released, or supported by ANYONE. with that in mind, it could get better with time, and when they finally release the public rom, test it again.
I was wondering the same thing if something was changed internally along the line.
I have hardware rev. 03, and my GPS blows.
fallingup said:
please remember that this is still a "BETA" rom. it is not publicly released, or supported by ANYONE. with that in mind, it could get better with time, and when they finally release the public rom, test it again.
Click to expand...
Click to collapse
Yes, and it is unlikely to be the cause of these discrepancies. With identical software setups between the Titans, I have left the hardware to be the lone differentiation. Could later software revisions resolve this hardware dilemma? Possibly, but with that mostly out of our hands and into the OEMs (I'm an old & jaded Toshiba e740 user....), I wouldn't put much hope in getting much more than what we are.
I started this thread because in the GPS FAQ thread some were expressing frustration at being unable to achieve the same GPS performance that was widely expected. With this side by-side comparison it may be comforting (though sad.... )to see that people may not be at fault for setting up the software on their phones. Myself and others were treating the GPS failures as though user error was at fault. After playing with my dad's Titan it is now clear to me that not all Titans are equal, and as such that may explain why the GPS abilities of the phone did not make it active to market. None of us bought these phones with a GPS guarantee.
jsmz, both mine and my dad's phones are hardware revision 0003. Without practical testing I don't think there is an obvious way to distinguish which phone will perform so radically different with its internal GPS. I have no inclination to tear them open..
i have hardware version 0003 and mine works fine...it gets me within ~10ft
My guess is if there are any deficiencies from one unit to the other it would most likely be in the Antenna not the actual hardware. Just about all of these units are chipset based and the features each unit has depends on how much of that chipset is used.
The fact that it is possible at all to turn on the GPS would seem to suggest it's not a hardware issue at all as far as chipset capability...
More likely just a individual manufacturing defect of that particular unit...
Could even be a bad soldering job...common with SMT boards.
Asphyx said:
My guess is if there are any deficiencies from one unit to the other it would most likely be in the Antenna not the actual hardware. Just about all of these units are chipset based and the features each unit has depends on how much of that chipset is used.
The fact that it is possible at all to turn on the GPS would seem to suggest it's not a hardware issue at all as far as chipset capability...
More likely just a individual manufacturing defect of that particular unit...
Could even be a bad soldering job...common with SMT boards.
Click to expand...
Click to collapse
I was thinking the same thing - the difference from one mass-produced unit to the next shouldn't be that substantial, and a bad/loose/iffy antenna or antenna connection is the most likely culprit.
Give it a good whack on the table and see if that smartens it up
Soundy106 said:
Give it a good whack on the table and see if that smartens it up
Click to expand...
Click to collapse
Just did that, didn't really help My gps really sucks takes at least 10 minutes to get a lock for the first time even outside with cleas sky. And even when I do get a lock using gmaps, it can be off by a whole New York City block, sometimes more. Too bad i can't just go to the sprint repair center and demand a replacement phone Maybe after the official release i will, who knows? But thank to this thread I don't feel so stupid anymore. I always thought i was doing something wrong, and after reading pretty much everything on gps here and installing quickGPS, i am quite sure it's not because of me.. But if anyone knows anything else i should try please feel free to tell me. Thanks
Asphyx said:
My guess is if there are any deficiencies from one unit to the other it would most likely be in the Antenna not the actual hardware.
Click to expand...
Click to collapse
Well as per forum posts the apparent hardware (chip revision, manufacturing flaw, etc...) discrepancy between units does not seem to be very isolated and it is best for all of us to be aware of this before banging our heads against the wall to get an afflicted unit operating.
My GPS works so well I was able to get a sustained lock at 35000 FT on a recent plane ride. That was cool, to see speed at 627KM/hour.
I have a friend that is also having GPS issues, so it appears to be fairly widespread.
having gone through 9 (yes, nine) telus P4000 units, i'm certain they are plagued with inconsistencies... getting on telus' case won't do much either except get you refurb after refurb if you're past the initial 14 days.
Lutzik - You mention off by a NYC Block...
Are you trying to use this in NYC?
I will point out that the height of buildings do block your unit from seeing enough satellites to get a fast and quick lock and whats more is you will also get reflections off the buildings that can hurt your accuracy if the conditions are right.
Remember GPS operates and locates you by noting the delay time it takes a signal to get from one of the satellite to you. It calculates the time it took the signal to get to you to determine how far away from that sat you are. By doing that for three sats minimum it triangulates your position...
Not a big problem with AGPS enabled navigators since the cell towers help ensure you have enough signal sources to throw out the errant data.
Sorry that did go a bit off topic...
I think the real issue is the beta radio driver. when a stable release is finally made I bet most everyone's sat lock and transmission issues will go away.
Asphyx said:
I think the real issue is the beta radio driver. when a stable release is finally made I bet most everyone's sat lock and transmission issues will go away.
Click to expand...
Click to collapse
It is possible to think that but beyond guessing we lack information to assume so while we have recorded cases of the erratic performance between devices with the identical software.
If a future software release resolves the problem then that further reaffirms a hardware discrepency between units. Yet we haven't seen a diffinitive answer that the units do have different gpsOne or other chipset revisions that require a software resolution while others units do not. As a few people are having GPS issues it may come down to the afformentioned quality control, manufacturing/design changes, etc..
It's cheaper to release a unit to retail without a potentially flawed feature than to advertise what may be broke and swallow a recall. I do think that we may be seeing why these phones were not sold as GPS enabled PPCs.
I know others are reporting success with the update but mine seems to not work.
Is there any hope or is mine just bad?
It does not lock onto anything and barely sees 1 satellite some of the time.
hmmmmmmmmmmmmmmm
mmoran27 said:
I know others are reporting success with the update but mine seems to not work.
Is there any hope or is mine just bad?
It does not lock onto anything and barely sees 1 satellite some of the time.
Click to expand...
Click to collapse
Same here.
Asus didn't say, "Here's an update to fix all GPS issues."
No need to freak out - everything is a work in progress.
Variables in play
Definitely NOT an even playing field. Even with margin of error, and huge differences in test conditions, I am of the belief that some GPS setups are better (or worse) than others. People reporting poor indoor performance made me envious, as I had NO indoor performance and could barely see satellites outdoors. This update stepped my GPS up substantially, I even got loc indoors (for about 6 seconds, LOL!)
My gut tells me they are NOT going to get it to a workable level, there is just too much to overcome, with the back design, but I do commend Asus for getting in there and giving it the old school try.
Got an external, bluetooth receiver, about 5" x 2" x.5" and it works well. I will probably rely on that, unless Asus pulls off a miracle of engineering.
After all they are "Inspiring Innovation" and "Persistent Perfection" whatEVER that is supposed to mean, LOL!
I have an Asus Motherboard that says the following on the box:
Rock Solid - Heart Touching
uh.. Okeeey then. Thanks for those words of wisdom and inspiration, Asus!
I have never recieved one Satellite hit on my Prime. Everything else appears fine, the WiFi appears fine.
However, I have tried GPSFix, GPSTest and I have never seen one satellite. My last prime I took back for Serial Number Unknown showed me 2 satellites for like 5 seconds and I never saw any on it either.
So I am doing something wrong, or my GPS was Dead on Arrival.
When I first got my Prime, GPS did not work.
The GPS firmware update that came for my Prime when it was still running Honeycomb made a huge difference. I was getting a fix on 10-12 satellites (though it took a couple of minutes).
After the ICS update, my GPS did not work again. The GPS firmware update today was no help ... I'm still getting nothing. I can only guess that there may be different GPS hardware models for the Primes. Hopefully, Asus can find a way to get us the correct firmware update for our particular model. I know that mine is fixable because it was fixed once before.
Frankly, I haven't noticed any improvements after last night's update.
I don't understand why they wont let us Just send it on and they change the backing for us
Sent from my Transformer Prime TF201 using xda premium
This is still the only issue with my Prime... even after the 1/18 firmware updates, still no GPS lock... It has never found or locked onto a single satellite.
I wonder if I should have done a hard reset after the latest firmware update. I did reboot all services/ tasks, but it didn't help.
Yeah, same here. Not a single lock before and after.
It's clearly a good sport in prime sections to open constantly new threads about the same subjects...
When you look really, you can close at least half of all threads!
Guys please! Stop opening threads for things already written many times! And especially when xda can't help you. I'd your GPS doesn't work... it doesn't work, see with Asus.
I got my dock last night and BOOM! GPS works like a champ. Take it off the dock and GPS dumps out. This gives me hope. Is it software or hardware?
Sent from my Transformer Prime TF201 using xda premium
Yeah same here. I do seem to remember GPS working shortly after I got it, but not since I went to ICS. Update didn't do anything. Using GPS status app, i don't even get a fix on a single sat. Wifi is another issue all together >_<
I went outside today after trying the fix. I could see 15 satellites and locked on to 10. I have one of the Australian primes but i don'tknow if that makes a difference.
My GPS works - not!
I guess I'm one of the luckiest Prime owner. After the firmware update I managed to get my GPS show something. It is far from perfect - it lag fetching the satellites reception and when it does it might just disappear at once all of a sudden.
I found that the best is out of town. in-town the disruptions is probably too much for it and the GPS going crazy and not-accurately. Out of town it had smooth reception and the GPS stayed connected for quite a while, like GPS should work.
all in all this tablet doesn't have a decent working GPS. i can't believe it can be fixed. it is the case and there is nothing to do.
first time I buy something of a first generation and it looks like I'm screwed!
Ok, Just unboxed my TP from Office Depot today. Google Maps seems to find me in my house within 20 meters. However, GPS Test is no dice with finding a single GPS. Is Google Maps doing something different. Im still on Honeycomb, want to see what HC does prior to updating to ICS. Anybody else experienced this.
GPS fix did fix my GPS but it screwed up my wifi. Range got reduced a lot.
gps & wifi fix that works
http://www.youtube.com/watch?v=vgx2Kpfi-Ps
Many jiayu users complain about bad or even unusable GPS, even worse than on other Mediatek devices. We all hope, it's a software issue and can be improved.
Let's collect information here. Please help by summarizing statements from other threads here and include links to the sources. Please stay on topic
General discussion about this device is here
Read a trojan warning here
Maybe I will update this first posting with the most useful information from time to time...
Software issue
I have the very strong and positive feeling, it is a software issue:
When I got my device with the 20140410 ROM, the GPS was really bad. Time to first fix was sometimes fast, sometimes it took more than 5 minutes, and accuracy was really bad most of the time. And as I could see on the map, it was much worse than reported - accuracy as can be seen i.e. in the GPS Test app was many times quite ok, like 4-7 meters, but the position on the map was 50m off, or more. Many times, the GPS continued to advance in the original direction after I stopped or changed direction. Sometimes there was some fixed offset, which stayed the same for 15 minutes.
Or I had a usable fix for a while, then I paused GPS just for a minute, and next try again took very, very long, even with a fresh AGPS download.
And all those problems under clear sky!
I tried many suggestions I found, but nothing really helped.
Then I upgraded to the 20140609-211642 ROM and first didn't notice a difference for some days (but didn't make methodic tests, and didn't use GPS much) and tried some of the suggested fixes again.
I also read about a hardware fix with some photos. I opened my back cover, just to see if my GPS antenna looked the same. I pressed the antenna down with my finger.
Then I noticed my GPS became really good! For a week I really enjoyed usable GPS and was very happy.
I thought it could be bad electric connection of the antenna to the mainboard, which was improved by pressing it down. But now I think it is not related:
After that week I got aware of the trojans in that ROM and restored a backup from before. Back to the April ROM, my GPS was immediately as bad as before! - pressing down the antenna didn't help again.
This unusable GPS annoyed me a lot last weeks and yesterday I decided to try the BORX ROM, but before I started a short test by restoring the 0609 backup where it all worked so well. I didn't have the time to really test (and I'm afraid of enabling internet - of course the 2 trojans are removed, but who knows what else is in there?). But it really looks like it is much better again! (First fix took really long without AGPS, of course, but then it was accurate, and also next tries, hours later, were fast.)
The problem is, I don't know exactly what I did, and don't have much time for experiments. So I don't know if it's just the newer ROM, or other changes. Can someone tell me what config or other files to compare between the 2 backups? I can also post them here.
Alex
My points and observations (I've tried 3-4 different 4.2.2 ROMs and 2-3 different 4.4.2 ROMs).
- GPS for me was about the same regarding its accuracy
- fix time also about the same, a few seconds up to a minute on the clear sky, a few minutes up to "give up" in the woods/buildings
- every ROM had a 1 hour difference bug between GPS reported time and the actual local time
- almost every time accuracy reported by GPS Test is very good (~4-10m)... the real one is much worse, I can confirm what Alex1a noticed. Also, what is really strange, my wife's Galaxy S4 Mini GPS Test accuracy (Snapdragon with Glonass) is significantly worse, yet there is no navigation and positioning issues
- some apps (Google Maps as example) have an arrow pointing your movement direction... this is usualy different than the real direction. Even the map is not rotated well.
I've sent a few emails to the Jiayu people I've found on some official website... but there was no response at all. I know that there is quite a strong community in Spain (Jiayu.es) and in Russia (4pda.ru). I'd also appreciate if anyone native tries to speak to these people regarding our GPS issues.
The good word is, that the GPS works I've done ~1000km over the last weekend and G4S led me to the places I needed. I've used Sygic, that in my opinion has better algorithms handling bad GPS signal. It also shows a nice line to the planned road, when the GPS signal puts you in the adjacent forrest The problem for me is, that the navigation can become frustrating, nervous and annoying. Especially when you have a lot of small and close roads/turns or you need to use it very quickly from the time you start the app.
I am trying to play ingress (a gps game) and half of the time it is unplayable. Ingress also often just quits/crashes without notice, and I think it is because it detects my gps as a fake gps for cheating
When that happened, I restart ingress immediately and sometimes it took more than 5 minutes to get a fix again, even though it worked seconds before.
With 0609 this was much better during that week.
I'm still on 20140609-211642 and GPS is really usable - much better compared to 0410, even inside a building, where 0410 could run hours without getting a fix! Please tell me what to compare between the two backups, to find out what setting makes this difference!
I am not sure, but I think I used MT GPS and faster GPS on both ROMs. Let's find out.
In the EngineeMode I saw some automated tests, and I am willing to do them with both ROMs - if someone exactly tells me how. I am too busy to find out myself...
Alex1a, could you quantify "really usable" when on 20140609-211642 ROM? How long does first fix last (in the streets), and do you have accuracy problems where GPS puts you on a nearby road by mistake?
I'm sorry I can't help more at the moment, I'm still holding off from buying this phone, but GPS is the only real issue I have with it, if I knew it would work correctly I'd get it right away, but everywhere I read problem is the same and since this is one of 2 reasons why I'm changing my current phone it's really important to me that it works fine
[EDIT 2014-Aug-06]
Here is one feedback, anyone else?
srkonus said:
Yesterday i tested GPS with the TeamForce v2 ROM and had no problems. Accurancy of 11 feet - 10 minutes later i wanted to navigate and the phone got no fix.
Navigon and GPS-Test shows nothing and it was not possible to get a fix. So i installed the TeamForce Android L ROM and for now everything seems to be okay again.
Click to expand...
Click to collapse
LuxZg said:
Alex1a, could you quantify "really usable" when on 20140609-211642 ROM? How long does first fix last (in the streets), and do you have accuracy problems where GPS puts you on a nearby road by mistake?
I'm sorry I can't help more at the moment, I'm still holding off from buying this phone, but GPS is the only real issue I have with it, if I knew it would work correctly I'd get it right away, but everywhere I read problem is the same and since this is one of 2 reasons why I'm changing my current phone it's really important to me that it works fine
[EDIT 2014-Aug-06]
Here is one feedback, anyone else?
Click to expand...
Click to collapse
I tried the GPS today again under heavy enviroment (inside a building, many metal around) and i got a fix on the window. In use was the TeamForce Kitkat Android L style without any changed (GPS location/time server is spain, i am sitting in germany). I have the feeling that i had only problems if i change it to germany.
The GPS on my old Samsung Galaxy S is more better but the G4S is enough for my use (tracking of running, car navigiation).
srkonus said:
I tried the GPS today again under heavy enviroment (inside a building, many metal around) and i got a fix on the window. In use was the TeamForce Kitkat Android L style without any changed (GPS location/time server is spain, i am sitting in germany). I have the feeling that i had only problems if i change it to germany.
The GPS on my old Samsung Galaxy S is more better but the G4S is enough for my use (tracking of running, car navigiation).
Click to expand...
Click to collapse
Thanks for your feedback, looks like this is it.. If you get a chance to test it on road (car navigation or tracking), just to see if you get any issues with "signal lost" or being put on the wrong road / in the fields beside roads and similar that would be great as well, but I'm thankfull for this much as well as it sounds as good news for all owners (and future owners )
LuxZg said:
Alex1a, could you quantify "really usable" when on 20140609-211642 ROM? How long does first fix last (in the streets), and do you have accuracy problems where GPS puts you on a nearby road by mistake?
Click to expand...
Click to collapse
Hard to quantify - I was really happy most of the time in the last weeks. First fix after long time of no use felt a bit long, something like 1-2 minutes, but then "real" accuracy was good and especially getting a new fix after some minutes of standby, was 5-10 seconds, I would say. With the older ROM, it sometimes took 5-10 minutes, even after only seconds of stopped gps.
BUT! yesterday, still on the same rom, I did a bicycle trip. first fix took more than 5 minutes, that was annoying. Then I recorded a track for about an hour. The track was quite accurate and looked good. Then I stopped the tracking and GPS. Only 20 minutes later, under free sky, I didn't get a new fix, no matter what I tried. Some time later, after some reboots it worked again, but was very inaccurate...
srkonus said:
I tried the GPS today again under heavy enviroment (inside a building, many metal around) and i got a fix on the window. In use was the TeamForce Kitkat Android L style without any changed (GPS location/time server is spain, i am sitting in germany). I have the feeling that i had only problems if i change it to germany.
Click to expand...
Click to collapse
You mean the time server set by "faster GPS" app? I tried that and rebooted, but no positive effect. I'm in germany, too.
Just ordered the phone, when it arrives I'll do as many tests as I can.
In the meantime - I'm assuming you did all this because I've seen this (and similar) solutions all over the forums and YouTube, but let me propose it just the same:
Code:
What you need is Mobileuncle mtk tools,root explorer,gps test download them from play store.
THIS SHOULD BE DONE OUTDOORS.
1. Turn GPS off on your phone.
2. Open Root Explorer and find the mtkgps.dat file in /data or /data/misc
3. Delete mtkgps.dat
4. Reboot phone
5. Open Mobileuncle Tools
6. Tap on 'Engineer Mode'
7. Tap on 'Engineer Mode (MTK)'
8. Scroll across to 'Location'
9. Tap on 'Location Based Service'
10. Tap on 'AGPS' and then make sure 'A-GPS On/Off' is checked
11. Tap on 'EPO' and then make sure 'Enable EPO' is checked
12. Swipe down (notification bar) and turn GPS on
13. Hit back and then tap 'YGPS'
14. Wait until you get position lock (mine took about 6 seconds).
15. This process should create a new mtkgps.dat file.
16. Hit home button and open GPS Test.
17. You should get a position lock reasonably quickly.
Also setting /etc/gps.conf (with any root-supporting text editor) manually to settings such as these:
Code:
NTP_SERVER=europe.pool.ntp.org
XTRA_SERVER_1=http://xtra1.gpsonextra.net/xtra.bin
XTRA_SERVER_2=http://xtra2.gpsonextra.net/xtra.bin
XTRA_SERVER_3=http://xtra3.gpsonextra.net/xtra.bin
INTERMEDIATE_POS=1
ACCURACY_THRES=5000
SUPL_HOST=supl.google.com
SUPL_PORT=7275
SUPL_TLS_HOST=supl.google.com
SUPL_TLS_CERT=/etc/SuplRootCert
PHONE_TYPE=UMTS
(instead of europe in first line you can modify according to lists on this website: http://www.pool.ntp.org/zone/@ )
EDIT: On my old (current) phone, I also have these issues with GPS, and doing above helped a lot, but it seems that I need to repeat some of the steps from time to time. Interesting thing is the delete of mtkgps.dat, sometimes it's enough to turn GPS off, delete it, and turn it back on and go to YGPS to renew the positions, and it works in <10 seconds. We'll see if Jiayu has same or better/worse track record.
Rom: G4SW 20140609-150354
I've installed a new ROM yesterday. Well it's not new, but I haven't met it before.
It is a stock ROM but modified by Jiayu Poland. So it is official one, but nicely cleaned from Chinese apps, keyboard is normal, no troyans... a nice worldwide multi language official ROM that you can use "out of the box".
But what impress' me the most is the GPS. It's the best one I've ever met on Jiayu G4S! This one really works for me! At least at the moment I don't know if it is because it's a fresh installation or the GPS is set for my part of the world. The facts is that the GPS fixes within seconds without 3G and I can get a fix even inside the building. What is more it is the first ROM that the arrow directing my position is aligned properly and it moves exactly as I turn around with the phone.
I've made a simple point to point navigation today morning. A few times it still put me on the adjacent road... but it is still WAY better experience than before. My cursor used to stop when I stopped... that did not happen before, it was always living it's own life
So please give it a try yourself and let me know if I'm dreaming or this one actually works. This is 4.2.2 for Jiayu G4S 2GB/16GB:
http://jiayupolska.pl/download/rom/G4S_20140609-150354_[jiayupolska_PL].zip
Thanks for the info, I just got a new G4S and will try this soon, as GPS is important to me, and I sure don't need trojans and chinese apps
Could you just tell me one thing, does this ROM still have Caller ID bug or is that one fixed as well?
Hmm... hard to tell as I've never experienced that problem. An easy way (step by step) to check that?
Do you get SMS threads for contacts separated because of numebers (not) starting with country code, does your phone show who's calling correctly, etc? But we'll be offtopic here, perhaps just edit your post in the "main" G4S thread
EDIT: Just came back home, downloading it, and erasing original system to factory settings.. will be there soon myself to check GPS, but I won't have SIM in it for a day or so..
EDIT2: installed, got GPS fix in 10 seconds from window, which is good, but I had WiFi running. I'll install iGO soon, and check on the road next day or two
Jiayu's GPS.
In many roms that problem is now fixed. MTK chips normally do not usually behave very well with their gps. But Jiayu suffers a lot from this lack. That is solved by changing a line system / etc / agps_profiles_conf.xml roaming on the file.
roaming = "yes"
And the application of Google Play "FasterGPS" help position quite quickly.
Only then the terminal has no problem to download the epo file and position well satellites.
Greetings.
Sorry, but that's just theory. In practice people claim that GPS is fixed in thier ROM but it did not work for me. GPS I mean not only the fix time but also accuracy.
Apart of the ROMs I've tried a few additional apps and fixes... with not much improvement.
The ROM quoted by me it's the first one that GPS works out of the box, without any additional fixes and apps and on GPS antenna only (no AGPS at all).
If anyone do some GPS navigation tests please try both with mobile network assistance (AGPS) and without it.
I'm not sure if I'm right, but I have a feeling that with a ROM from post #11 the navigation apps work better without that assistance, with the GPS antenna only.
A few days now and I'm still amazed with that ROM regarding the GPS usage. Anyone unsure I recommend to give it a try
Doman said:
I've installed a new ROM yesterday. Well it's not new, but I haven't met it before.
It is a stock ROM but modified by Jiayu Poland. So it is official one, but nicely cleaned from Chinese apps, keyboard is normal, no troyans... a nice worldwide multi language official ROM that you can use "out of the box".
But what impress' me the most is the GPS. It's the best one I've ever met on Jiayu G4S! This one really works for me! At least at the moment I don't know if it is because it's a fresh installation or the GPS is set for my part of the world. The facts is that the GPS fixes within seconds without 3G and I can get a fix even inside the building. What is more it is the first ROM that the arrow directing my position is aligned properly and it moves exactly as I turn around with the phone.
I've made a simple point to point navigation today morning. A few times it still put me on the adjacent road... but it is still WAY better experience than before. My cursor used to stop when I stopped... that did not happen before, it was always living it's own life
So please give it a try yourself and let me know if I'm dreaming or this one actually works. This is 4.2.2 for Jiayu G4S 2GB/16GB:
http://jiayupolska.pl/download/rom/G4S_20140609-150354_[jiayupolska_PL].zip
Click to expand...
Click to collapse
Hello,
Good News.
Can you install Xposed and gravitybox in this ROM?
Roms with GPS fixed.
Hello everyone! Apart from the many roms (and very good all) that ye can download, there is a website where there for our G4S and the G3S. androidteamforce.es
I say this because there all roms have fixed the gps well and are very stable. And even more so those in kitchen. If you want to try, you know (are also in needrom). While development is Spanish, the website is translated into English as well.We recommend them! I'm using the AOSP v2 with fixes memory and root, and I'm doing everything works perfectly, even Titanium. The GPS usually takes me ten radars detected, seven or eight. A marvel.
A greeting.
Doman said:
If anyone do some GPS navigation tests please try both with mobile network assistance (AGPS) and without it.
I'm not sure if I'm right, but I have a feeling that with a ROM from post #11 the navigation apps work better without that assistance, with the GPS antenna only.
A few days now and I'm still amazed with that ROM regarding the GPS usage. Anyone unsure I recommend to give it a try
Click to expand...
Click to collapse
Hmmm... now I'm not sure if I'm seeing things either, but you could be right. It took me few days to transfer 100% to new phone so I was testing it on and off. Always with WIFI/3G turned on. While I got fix quickly, precision was a bit off, well.. up to 40-50 meters sometimes, enough to cause problems.
Today on my way from work I've turned on tracking, was still for a minute or so, and than started ride on a bike. Than minute or so later I remembered your advice, and turned off all data (Wi-Fi/3G) and continued. Now I'm looking at a chart, and first part of the ride looks terrible, like I was a crazy bug flying all over the place (with speeds up to 80km/h), and than suddenly I'm straight on course, with normal data being recorded and all the way to the finish line. From the tracking side, first 3,5 minutes I was off by soooo much, but from then on I had a positional error of margin of about 5 meters, no more (other side of the road etc.), and kept on going like that for 14 more minutes.
Since I'm biking a lot, well, when it's not raining, I'll do some more tracking, and I'll track test routes with car as well. I'll try not to use WIFI/3G at all during tracking, and we'll see if data will be consistent. I know that GPS on this ROM isn't perfect, as can be seen from todays 80km/h data and some extra 2km while I was mostly standing, but let's see if indeed data is being a culprit for GPS errors. Who knows, maybe the same way as Bluetooth interferes with Wi-Fi / Wi-Fi Display, maybe Wi-Fi and/or 3G causes malfunctions in GPS data, or somehow chip uses Wi-Fi positioning in addition to GPS causing it to add wider errors. We'll see, so far this is just a theoretic thing, I'm waiting for at least 4-5 good rides till I'm satisfied
I don't know how many more times my desk will survive due to me banging my head against it...
It's a long story which I will cut short; we have bought a large number of cheap handsets (Nuu A3L, spec sheet here: https://www.devicespecifications.com/en/model/4fc6428b ) and they're using Sygic truck as their navigation tool.
We straight away ran into some major issues, the main one being with Sygic/GPS. The devices would begin navigating but would then start to lose GPS signal and start bouncing around, sometimes they would recover (only to do the same thing again a few minutes later) and other times they would just lose GPS connectivity entirely and would lock up for 10+ minutes.
After seeing how poorly the application ran on these devices I had a hunch that the application was hogging every last drop of available system resource. I removed as much bloat from the application as possible, I turned off the 3D map (2D is much more fluid), turned off all POI, turned off traffic updates etc and it appeared to resolve the issue. I drove for 30 minutes with two devices side-by-side, the default one continued with its horrid GPS loss while the customised one worked fine.
A few people have taken these out today to test, but are apparently having the same issues regardless of the changes that I made.
I'm now at a loss and struggling to work out what else can be done to help. They're running Airwatch and we can push remote changes out at any time, so I am at the mercy of those more knowledgeable than I (you).
If anybody has a decent suggestion then you win a free balloon.
jaffster said:
I don't know how many more times my desk will survive due to me banging my head against it...
It's a long story which I will cut short; we have bought a large number of cheap handsets (Nuu A3L, spec sheet here: https://www.devicespecifications.com/en/model/4fc6428b ) and they're using Sygic truck as their navigation tool.
We straight away ran into some major issues, the main one being with Sygic/GPS. The devices would begin navigating but would then start to lose GPS signal and start bouncing around, sometimes they would recover (only to do the same thing again a few minutes later) and other times they would just lose GPS connectivity entirely and would lock up for 10+ minutes.
After seeing how poorly the application ran on these devices I had a hunch that the application was hogging every last drop of available system resource. I removed as much bloat from the application as possible, I turned off the 3D map (2D is much more fluid), turned off all POI, turned off traffic updates etc and it appeared to resolve the issue. I drove for 30 minutes with two devices side-by-side, the default one continued with its horrid GPS loss while the customised one worked fine.
A few people have taken these out today to test, but are apparently having the same issues regardless of the changes that I made.
I'm now at a loss and struggling to work out what else can be done to help. They're running Airwatch and we can push remote changes out at any time, so I am at the mercy of those more knowledgeable than I (you).
If anybody has a decent suggestion then you win a free balloon.
Click to expand...
Click to collapse
Let me be clear that I never played with sygix enough to speak directly about it. You may have already tried the things I'm brainstorming here.
I'm not clear as to why you didn't just load a different mapping app on these? There certainly are a lot of them.
What level of connectivity are they using? If you are on GSM or 3G, downloading map information as the vehicle moves around, that could slow things down to a crawl. Using an app that doesn't have to work this way could be a solution.
I noticed that the phone has a 500ish MHz clock speed and just 1 GB of RAM. As you've discovered, every layer of complexity in the mapping will slow it down further.
Something like Tom-tom was written to run on a lot less hardware. That's the kind of thing that I'd look for. I believe that Here is also made for very low end hardware.
Not sure if it helps, but at least it's a path worth looking at.
Sent from my SM-G950U using Tapatalk
Hello,
I made my first Cycling yesterday but was very disapointed with GPS tracking. After my run the track was about 50 m out off the real road.
Sometimes it is ok sometimes not.
if i stop moving the watch still detect movement and indicates a speedsometimes. Stratos did not have this pb (so sad the HR sensor died)
Do you have same issue?
Hi,
I've the same issue in my GTR.
Very disappointed.
I hope Huami solve this in future firmware update
Sent from my Redmi Note 5 using Tapatalk
Same issue with my GTR. I do hope they plan to improve it in a future firmware. I just sent a tweet to them to ask about the GPS issue I will let you know if I get a response.
Same here, tried to update agps without success
The GPS isn't good at all in general (I have a verge). The accuracy of the distance is really bad. Compared to a GPS bicycle computer (I have compared it to wahoo, garmin and lezyne) the distance recorded with the watch is always too less. It differs 2-5% of the real distance.
I have the same issue with my GTR It looks like off the road/streets by 20meter, sometimes on one side sometimes on the other so it is just very inaccurate... My pace worked much better (until I went inside the pool with it), I regret I didn't buy a Stratos to replace instead of the GTR. Also if you are used to a allways-on-display it is hard to downgrade to AMOLED, pity the transflective LCDs seems to be abandoned.
Yes i really hope they will be able to fix that because the watch is unusable in this configuration for sport tracking... again they've released their product too early without finishing to develop it...
My Stratos was really good for GPS tracking but HR sensor died...
Bought this GTR thinking it could be better as it is their latest product (and hope it would be more reliable)
Lets hope for a good update
I send a email to Huami support and they demand examples to check.
Please, feel free to do the same.
Hello,
i've sent email to support also here is what they've just answered to me:
Hello There ，
Thank you for contacting Amazfit Customer Support. We apologize if the products caused you any inconvenience.
As for the GPS issue, our developer team has located the issue and are working on it. And we will release an update to optimize it soon. Hope you understand.
Should you have any further questions, please contact us with opening a new ticket or just reply to this ticket and it will automatically reopen in our system. We are more than happy to help!
Sincerely ,
Alice
Amazfit Support
we just have to wait...
winni21 said:
Hello,
I made my first Cycling yesterday but was very disapointed with GPS tracking. After my run the track was about 50 m out off the real road.
Sometimes it is ok sometimes not.
if i stop moving the watch still detect movement and indicates a speedsometimes. Stratos did not have this pb (so sad the HR sensor died)
Do you have same issue?
Click to expand...
Click to collapse
Same....
Friday I received the new firmware and after going for a couple of runs I can confirm that it didn't fix the accurancy. The only improvement I see is that it fixes satellites very fast now (before it would take a minute)
With amazfit app and with GTR... I could not be more disappointed.
kulaki0 said:
Friday I received the new firmware and after going for a couple of runs I can confirm that it didn't fix the accurancy. The only improvement I see is that it fixes satellites very fast now (before it would take a minute)
Click to expand...
Click to collapse
very fast? you are lucky then... It's true that sometimes it fixes them faster, but other times dosen't fix any at all.
I will try to return it back to the seller.
The gps tracking with GTR and the Amazfit app
https://ibb.co/MN44Twx
https://ibb.co/WfmP60q
I'm having the same problem. Last night the A-GPS was updated, but it didn't seem to improve at all. Does anyone has any news regarding this problem?
just wait for Amazfit update (according to Amazfit and Gearbest...)
The shop offered a full refund and I decided to return mine. Will buy the Stratos 3 instead.
kulaki0 said:
The shop offered a full refund and I decided to return mine. Will buy the Stratos 3 instead.
Click to expand...
Click to collapse
Why do you think it will be netter?
My Pace was pretty good and from what I read the Stratos is also fine. The Stratos 3 support more GPS satellites than the GTR so at least is not the same hardware
After reading all the bad news about the GPS accuracy, I tried a 6 km run yesterday for the first time with my new GTR (aluminium). I was really surprised that the track it recorded was actually correct and pretty accurate. I think there many factors that influence the performance of the GPS.