[Q] Cellular signal issue - Xperia Z2 Q&A, Help & Troubleshooting

I am on 4GEE here in the UK and when ever I'm inside I get no service (there's a 'x' next to the signal bars). I figured it's not my carrier because others around me on the same carrie gets signal, I was wondering if anyone else is having this issue?
EDIT: My bootloader is unlocked and I am rooted, also I'm not running any custom ROMs. I have Xposed installed with APM and GEM Xperia Xposed modules installed

i
Lawrence1m said:
I am on 4GEE here in the UK and when ever I'm inside I get no service (there's a 'x' next to the signal bars). I figured it's not my carrier because others around me on the same carrie gets signal, I was wondering if anyone else is having this issue?
EDIT: My bootloader is unlocked and I am rooted, also I'm not running any custom ROMs. I have Xposed installed with APM and GEM Xperia Xposed modules installed
Click to expand...
Click to collapse
cause there were not problem at first and problems occur after root and ...
there s something incompatible or wrong u installed.
reinstall modem can help u.
:good:

x102x96x said:
cause there were not problem at first and problems occur after root and ...
there s something incompatible or wrong u installed.
reinstall modem can help u.
:good:
Click to expand...
Click to collapse
What do you mean re install modem? should I just do a full wipe of my phone and not restore my backed up apps?

i
Lawrence1m said:
What do you mean re install modem? should I just do a full wipe of my phone and not restore my backed up apps?
Click to expand...
Click to collapse
i don't if any flashable zip of modem/Baseband be available for Xperia Z2.
u should search in dev section or ask one of ROM developer for xz2 to make it.
if u don't know wht i mean just search it on google;
for example this link is about modem of Galaxy S4
DO NOT try its tutorial and file cause it s for galaxy s4 just read wht is it;
http://forum.xda-developers.com/showthread.php?t=2487298

x102x96x said:
i don't if any flashable zip of modem/Baseband be available for Xperia Z2.
u should search in dev section or ask one of ROM developer for xz2 to make it.
if u don't know wht i mean just search it on google;
for example this link is about modem of Galaxy S4
DO NOT try its tutorial and file cause it s for galaxy s4 just read wht is it;
http://forum.xda-developers.com/showthread.php?t=2487298
Click to expand...
Click to collapse
Thanks, I think I kind of understand what they are, I used to have HTC and never had this problem before so I'm kinda new to this, thanks anyway!

I was searching this issue and ended up in this thread. I am finding the Z2 really bad for reception and mine is unbranded latest firmware (unlocked) straight from mobile shop. At work I have three cells being used, it jumps from one to another with bars of 3-4 but still goes off. AT home pretty much the same. It seems to be worst when there are multiple cells to use.

My network advised me to disable 4G in mobile settings as not available in my area or region. This should reduce the phone scanning the cells too often. Using OpenSignal does indicate phone is not switching cells as much but still crap signal

lywyn said:
My network advised me to disable 4G in mobile settings as not available in my area or region. This should reduce the phone scanning the cells too often. Using OpenSignal does indicate phone is not switching cells as much but still crap signal
Click to expand...
Click to collapse
Well this help me, thanks! I tried a different network having suffered cr*p signal for months, and found it was no better. Different phones were way better so I was just about to buy a new one when I tried un-selecting 4G. It has made all the difference, my phone is now perfect!

Related

Problems since BLG8?

So last night I updated my s3 to the latest UK firmware, XXBLG8, And I can't tell if my problems stem from the latest update!
After the update many apps wouldn't open and I'd have to do a battery pull to sort out each individual app that refused to load, everything's fine now, however, my data connectivity seems to have worsened considerably, even with full signal strength and HSPDA nothing will load, the browser shows errors that I'm not connected to the internet and apps such as the Play Store and Speedtest won't connect.
Anyone else experiencing this problem? Would I be able to flash back to an earlier firmware using ODIN? (I'm new to the s3 scene, just jumped ship from a Desire HD and haven't yet fully got my bearings.)
Thanks guys!
jrush4 said:
So last night I updated my s3 to the latest UK firmware, XXBLG8, And I can't tell if my problems stem from the latest update!
After the update many apps wouldn't open and I'd have to do a battery pull to sort out each individual app that refused to load, everything's fine now, however, my data connectivity seems to have worsened considerably, even with full signal strength and HSPDA nothing will load, the browser shows errors that I'm not connected to the internet and apps such as the Play Store and Speedtest won't connect.
Anyone else experiencing this problem? Would I be able to flash back to an earlier firmware using ODIN? (I'm new to the s3 scene, just jumped ship from a Desire HD and haven't yet fully got my bearings.)
Thanks guys!
Click to expand...
Click to collapse
only problem i have noticed is that speedtest does no longer work but everything else perfect. Infact my hsdpa connection is much better on this rom. you can easily downgrade your rom back if you wish just follow this excellent guide to flash via odin.
http://forum.xda-developers.com/showthread.php?t=1671969
dazbutler1 said:
only problem i have noticed is that speedtest does no longer work but everything else perfect. Infact my hsdpa connection is much better on this rom. you can easily downgrade your rom back if you wish just follow this excellent guide to flash via odin.
http://forum.xda-developers.com/showthread.php?t=1671969
Click to expand...
Click to collapse
Hmm, I suppose it could be the area I'm in, but it's usually fine where I am. I'll give it another couple of days and test it in other areas to see if the problem persists.
I've upgraded via ODIN before, just wasn't sure if there were restrictions on downgrading etc, I'll give the thread you linked to a good read now, thanks!
Try changing Modem BULF1 for starters .
I find the last two updates modems are very poor .
jje
dazbutler1 said:
only problem i have noticed is that speedtest does no longer work but everything else perfect. Infact my hsdpa connection is much better on this rom. you can easily downgrade your rom back if you wish just follow this excellent guide to flash via odin.
http://forum.xda-developers.com/showthread.php?t=1671969
Click to expand...
Click to collapse
I am also on the 8 firmware and so far it's good.
looks like speedtest.net have changed there site slightly if you goto site with mobile agent set on browser it redirects to the play store to the speedtest app, change browser to desktop as long as you have flash installed all is fine. I believe this has been done site to the up and coming removal of mobile flash
Sent from my GT-I9300 using Tapatalk 2
JJEgan said:
Try changing Modem BULF1 for starters .
I find the last two updates modems are very poor .
jje
Click to expand...
Click to collapse
Thanks, I'll give it a go!
So I decided to bust out my Desire HD, I remembered I still have a month left on my old contract before it gets terminated, checked the data connectivity on there and I seem to be having the same issues. Looks like it's a problem with 3 in general rather than it being my s3. Which is good news for my s3!
Must have been pure coincidence that I started having these issues right after upgrading, however, I tried a few new modems and have been getting better signal (no change with the data issues) so at least I've taken something away from the experience
Isn't there an issue with 3 UK branded ROMs experiencing network issues when you flash the unbranded ROM? I think you may need to flash a separate modem, Google it, I may be wrong.
I'm on 3uk running blg8 not had any problems making, receiving calls and texts and my network is fine on both wireless and 3g
Sent from my GT-I9300 using Tapatalk 2
It seems to be working pretty well this morning on both my s3 and DHD, and Frostfree I'll have to check that out, I've already flashed a few new modems and I'm getting better performance so that might very well be the case!
I'm in Folkestone (south east coast)
I am on BLG6 with Cyanogen Mod 10 latest rom and so far I have great speeds (4-5Mb) on speed test app.
Will try flashing BLG8 when i can find a download link. I just want the modem to flash not a whole rom cos i am loving JB on the SGS3.

Radio Needed For Cyanogen And Samsung Galaxy S2?

Hello, I've flashed the Cyanogen mod for my Samsung Galaxy S2? I've been using it, it works fine.
I'm wondering, do I need to flash a radio? If so, which one? I've seen the links of radios from the Wiki page of Cyanogen under Support Downloads, just don't known which one to use or if I'm supposed to.
Thanks for your help.
Radio is not changed by CyanogenMod.
If you have no call, sms or data issues then i dont think you need to change
-Grift- said:
If you have no call, sms or data issues then i dont think you need to change
Click to expand...
Click to collapse
OK, thanks for your help.
I have successfully installed this rom. I think it's the most amazing jelly bean rom for galaxy s2 at the moment. I like its smoothing and quick response. feel a bit warm at the back and the battery is losing 1% at every minute while wifi is on. Over all is great. Cheers!
Actually, I've been experiencing data connection problems. My phone works, but it won't connect to 2g/3g for internet.
Should I try switching radios?
If so, which one is recommended? Or do you just try them at random?
Thanks again
On first boot normally can't get mobile data to work because APN was not configured properly (or the list empty), after a reboot mobile data will work again. If it doesn't, then you have to key in the APN manually.
For radio/modem, since there are no changelog released and nobody know what are the differences among them, it is assumed that the latest one will be better.
HTCOrangeCat said:
Actually, I've been experiencing data connection problems. My phone works, but it won't connect to 2g/3g for internet.
Should I try switching radios?
If so, which one is recommended? Or do you just try them at random?
Thanks again
Click to expand...
Click to collapse
first and foremost asking or recomending which ROM/KERNEL/MODEM ,is against XDA rules, since all phones are different due to various reasons , hence if u have a an issue with ur modem u have to try a cpl of them on ur own and see the one suits u the best.
link for the same below.
Modem Collection
OK. I'll try a few different radios. I see a list of links in the Cyanogen Wiki page of under Support Downloads.
Thanks for the quick replies!
HTCOrangeCat said:
OK. I'll try a few different radios. I see a list of links in the Cyanogen Wiki page of under Support Downloads.
Thanks for the quick replies!
Click to expand...
Click to collapse
It sounds like your apn settings are messed up. Try to reboot twice and then try. If that doesn't work, you will have to find the settings and input them manually.
Sent from my GT-I9100 using xda premium
After trying over 30 radios I always end up on nelp3. Best signal best data thoroughput and best for battery life.
Sent from my resurrection remixed GT-I9100 using xda app-developers app
Thanks everyone! The radio did it!
I flashed this radio:
galaxys2.radio-XXKDH-signed
Now, the data, 3G, works great.
I've been experiencing an issue and have read several post about RADIOS on the SGS2.
I flashed my mobile with the nightly 10.2 CM and after that it started to ask me for "SIM network UNLOCK" Which I can't unlocked, thought it was the version issue so I dl a the newest one and same issue, I tried the ICS stable 9.1 and same issue.
I've read something like radios on the CM support part. Which I dunno where is it yet . If I need to flash it and u guys can help me out to pick up the correct one I'll appreciate it. my model of SGS2 is the i777 from AT&T.
May I install NELP on my CM 9.1? how? where can I get the files to do it?
I777 modem collection
http://forum.xda-developers.com/showthread.php?t=1361393
Sent from my GT-N7105 using xda app-developers app
Issues
Hello everyone. I tried many modems (XXLS8, NELP4, XXKI4, BVLP7 etc.) but each of them had some different issue. First was loosing network, with second the front speaker stopped working... Just noone worked fine :\ I don't know what to do yet! Any advices?
ac.dc.76 said:
Hello everyone. I tried many modems (XXLS8, NELP4, XXKI4, BVLP7 etc.) but each of them had some different issue. First was loosing network, with second the front speaker stopped working... Just noone worked fine :\ I don't know what to do yet! Any advices?
Click to expand...
Click to collapse
What phone do you have? This is the thread for the i777 S2 variant, and at least one of the modems you mentioned are for the i9100 variant (don't recognize the others you list).
You can only use modems designed for your device, so if you have an i777 see the link directly above your post.
SteveMurphy said:
What phone do you have? This is the thread for the i777 S2 variant, and at least one of the modems you mentioned are for the i9100 variant (don't recognize the others you list).
You can only use modems designed for your device, so if you have an i777 see the link directly above your post.
Click to expand...
Click to collapse
Sorry, wrong thread. Hadn't time to ask for delete my post :\

[Q] Modem Help

I have a Samsung Galaxy SII, the i777. I have rooted it and loaded ShoStock3. I love the ROM except I'm having trouble downloading apps from Google Play. The research I have done suggests that I need a better modem. I have downloaded and flashed six different modems. Each one just as slow as the last. I'm in Salt Lake City, Utah. I know that the location can have something to do with the modem as well. Does anyone have a suggestion on which modem would work the best? Also, if you happen to know that there is a separate problem and that it's not the modem, will you please let me know? Everything else seems to load fine, it's just trying to load apps from the market that I'm really noticing it is really slow. Thank you everyone in advance.
overlordofplanetawesome said:
I have a Samsung Galaxy SII, the i777. I have rooted it and loaded ShoStock3. I love the ROM except I'm having trouble downloading apps from Google Play. The research I have done suggests that I need a better modem. I have downloaded and flashed six different modems. Each one just as slow as the last. I'm in Salt Lake City, Utah. I know that the location can have something to do with the modem as well. Does anyone have a suggestion on which modem would work the best? Also, if you happen to know that there is a separate problem and that it's not the modem, will you please let me know? Everything else seems to load fine, it's just trying to load apps from the market that I'm really noticing it is really slow. Thank you everyone in advance.
Click to expand...
Click to collapse
Modems are good in different places. What's good for me might be awful for you. Have you done a speed test?
Sent from my SGH-I777 using xda app-developers app
You've already flashed 6 different modems, you should know by now which one is the best for you out of those 6.
If you don't like them all, try some more and pick out the best.
Have you tried KH7 or LL6?
Side note: why can't you use Wifi for Google Play?
You are I assume flashing modems for this device right? I only ask because obviously the i9100 modems wouldn't work for us. (And I'm pretty sure calls don't work with them) also, if you are flashing all these modems and they ARE for our device, and NONE are working properly, I would look at a fresh flash of the rom of your choice wiping everything again or going back to stock to eliminate hardware error possibility.
I did verify that they were all for my model and network. None of the six were any better than any other. I also noticed none of them worked on the 4G network. I tried to download an app to do a speed test but after 30ish minutes waiting for it to download on each modem so I could test it, I gave up.
Shoman94 changed to UCLL6 modem on his latest build. Are you using this one now?
Or you can select all the modems from here:
http://forum.xda-developers.com/showthread.php?t=1336958
They seem to be working OK, at least for me. I have tried at least half of them although I am still running ICS (CM9.1), not JB like you.
overlordofplanetawesome said:
I did verify that they were all for my model and network. None of the six were any better than any other. I also noticed none of them worked on the 4G network. I tried to download an app to do a speed test but after 30ish minutes waiting for it to download on each modem so I could test it, I gave up.
Click to expand...
Click to collapse
In the Settings of ur phone, since u r runnin SHOstock 3, do u have the Mobile data box checked under Data usage ? And do u have the "Set mobile data limit" box checked under Data usage (this could hinder u) ?? And under More settings/Mobile networks is the Network mode set to something Other than the "GSM/WCDMA (Auto mode)" (this could also be the problem)??
Sent from my SAMSUNG-SGH-I747 using xda premium
So, I un-rooted my phone but from what I understand, even doing that won't re-set my modem. It's still working slowly. My biggest fault here was not doing speed tests from the beginning and not noting down what my phone came with. If I could find what modem my phone came with, I would root and load it back on.
I really appreciate everyone's help and suggestions.
Is there anyone in Utah on the 4G version of the SII that could tell me what their modem is?
overlordofplanetawesome said:
So, I un-rooted my phone but from what I understand, even doing that won't re-set my modem. It's still working slowly. My biggest fault here was not doing speed tests from the beginning and not noting down what my phone came with. If I could find what modem my phone came with, I would root and load it back on.
I really appreciate everyone's help and suggestions.
Is there anyone in Utah on the 4G version of the SII that could tell me what their modem is?
Click to expand...
Click to collapse
Check your APN settings, that can cause plenty of issus for data.
I777(S2)
Captivating M3
UCLE5
AJK 1.49

[Q] Can I change modem im my AT&T Note?

HI everyone... I have a question:
I have an at&t sgh i717 with a virgin sim (Im outside of the us), and I need to choose a new modem (I think) because currently I have this t989 uvle1 for tmobile that I had to use to unlock my phone. I'm getting three bars in the signal so my question is or are: do I really need to change the modem? Does the signal have to show more bars so that one can be sure that the modem fits the phone? And, a modem has to be chosen depending on your phone and on your location (since I'm in southamerica)? does having a 2.6.3 kernel affect any of this, should I upgrade it?
I hope I'm not asking too much, sorry,
thanks
Wrong forum, belongs here. I've asked mods to move your post, sit tight.
Edit - You mean i777, right ? (I717 is the AT&T Note).
MistahBungle said:
Wrong forum, belongs here. I've asked mods to move your thread, sit tight.
Edit - You mean i777, right ? (I717 is the AT&T Note).
Click to expand...
Click to collapse
Oops sorry, it's i717 AT&T note, so It must be either deleted or moved, I thought I could post my question here, sorry again
...
malybru said:
Hi,
Just open a thread HERE
PM me ,and I will delete these posts.
Click to expand...
Click to collapse
errr... oops, sorry mate, moved posts literally 20 secs after you posted this
Thanks for placing this in the proper section
Since you have an i717, normally you would probably want to flash back to an AT&T based modem. However, since you're probably not on AT&T's network, your best bet is to try several modems and see which one works best with the provider in your area. My recommendation is to at least base your tests on signal strength and speed tests.
jman315 said:
Since you have an i717, normally you would probably want to flash back to an AT&T based modem. However, since you're probably not on AT&T's network, your best bet is to try several modems and see which one works best with the provider in your area. My recommendation is to at least base your tests on signal strength and speed tests.
Click to expand...
Click to collapse
OK, I'm going to try several because just yesterday I found out that my gps didn't work and I think that's related to not having a suitable modem.
Additionally, I performed a speed test and whereas I get 12 mbps for download in my laptop I got 10 mbps in my phone, not much of a deal though.
Regarding signal, I get from three to four bars which isn't that bad and I've made a couple of calls and everything seems to be fine.
Since the gps thing is a real setback I'll flash another modem but I'm also thinking on upgrading to ics because right know I'm on gingerbread 2.3.6 with 2.6.3 kernel so I wanted to know if It's better to flash the modem before or after upgrading.
Thank you for your answers
You will probably have better luck if you upgrade to an ICS or jelly bean based rom.
Sent from my SAMSUNG-SGH-I717 using xda app-developers app
The gps not working isn't always antenna issues. You can try to update the gps data file. Go to the market and get a gps fix app. You're looking for an app that will replace your gps configuration file with an updated file.
rangercaptain said:
The gps not working isn't always antenna issues. You can try to update the gps data file. Go to the market and get a gps fix app. You're looking for an app that will replace your gps configuration file with an updated file.
Click to expand...
Click to collapse
Thanks, good to know that.. it's just that when I received the phone it was working and based on that and some comments on internet I attributed this error to the switch in modem/baseband/radio...
Anyways, I'm installing a rooted ics rom and I'll come back to comment, hopefully positive things

Mediapad X1 Signal issues getting worse over time..

When I got the Mediapad X1 (503L) a couple months back it came with 4.2.2. and the wifi and cell signal were pretty weak and inconsistent. They were workable however...
I upgraded to 4.4.2 (B007) and it seemed to be a little better for a month or so, however lately in the last week or so it had seemed to take a downward spiral. The Wifi is connected but no data gets transferred at all. I have to put it in airplane mode to get the wifi to "reset"
Any one else notice this? This phone is great, but the wifi and 3G/4G stuff just seems to stall and hang way too much.
I'm located in the US on AT&T.
In my experience B006 was best for gsm signal. At the price of no 5GHz wifi.
2.4GHz works fine in both versions for me. But then I am in Europe................ .........
mru55 said:
In my experience B006 was best for gsm signal. At the price of no 5GHz wifi.
2.4GHz works fine in both versions for me. But then I am in Europe................ .........
Click to expand...
Click to collapse
I can understand issues with 3G and 4G in USA as the phone is made and tested in China with different frequency needs,
But Wifi is the same everywhere isn't it?
No it isn't.
Until a few years ago you had to select USA, europe, or Japan when setting up a wifi network. This process is automated now based on network parameters "spied" by the modem.
Huawei implements this poorly or not at all on their chinese market devices, including the international 501L not intended for the US market.
The good news is: it isn't like it won't work at all. Sometimes it just helps changing the channel. The wifi analyzer app is a great tool...... .. .. ... ....
Otherwise one would have to extract the modem apk of a dedicated us provider from the rom.
Great information!
I'm using a 503L, Wifi in the US is very hit or miss. (Which makes sense now reading your post)
How do I get the phone to use a certain channel? That's up to the Wifi access point isn't it?
omniphil said:
Great information!
I'm using a 503L, Wifi in the US is very hit or miss. (Which makes sense now reading your post)
How do I get the phone to use a certain channel? That's up to the Wifi access point isn't it?
Click to expand...
Click to collapse
I used the app wifi analyzer to see which channel is the best.
And yes, then you change it in the router.
Phone is really getting bad now with signal, several times a day now The Wifi is connected but won't actually transfer any data, the same with 3G/4G. Sometimes even putting it into airplane mode doesn't fix it and I have to do a full reboot.
The other big problem is app being shut off automatically in the background. I use Google Hangouts and Line to chat with people and after a while those processes get closed and won't give me notifications until I manually open the app which seems to restart it.
I really hope there is a fix in the works (I'm on the B010 update)
The 4.2.2 seemed to be more reliable for signal issues and never closed apps in the background, however the performance of 4.2.2 was terrible...
Just a warning for any folks in the USA that are considering this phone.
Have clicked those apps in "power saving /protected apps"?
I don't know what to tell you about your comm issues. Wifi AND phone does not point to an antenna issue. Maybe a factory reset or loading the firmware once more?
mru55 said:
Have clicked those apps in "power saving /protected apps"?
I don't know what to tell you about your comm issues. Wifi AND phone does not point to an antenna issue. Maybe a factory reset or loading the firmware once more?
Click to expand...
Click to collapse
Yes, they are setup as "Protected" still doesn't keep them from stopping.
I'm hoping we see another update from Huawei so I can start from scratch with the version instead of wiping what I already have.
Yeah, waiting is notva bad choice.
I am doing the same, waiting for a standalone B008 for my 503L. If that is no good I'll go back to B006.
mru55 said:
Yeah, waiting is notva bad choice.
I am doing the same, waiting for a standalone B008 for my 503L. If that is no good I'll go back to B006.
Click to expand...
Click to collapse
The 503L is up to B010, not sure they will do a B008?
Forgot to mention that as long as 4.4.2 forces the dpi to 400, I ain't changing.
mru55 said:
Forgot to mention that as long as 4.4.2 forces the dpi to 400, I ain't changing.
Click to expand...
Click to collapse
Yeah, that really needs to be fixed too. I am sort of getting used to the larger DPI, but the issue is app compatibility, so many apps won't install from the Google Play store with the 400DPI
Has anyone tried that Custom Recovery for the 503L? I sure which I could take a backup of the whole rom, i'd Probably got back to 4.2.2 as everything seemed to work better just performance was laggy.
@omniphil you could try the cwm at my thread. I got it from the German and Russian forums which in turn got it feom the Chinese forums.
Sent from my SM-N9005 using Tapatalk
joytest said:
@omniphil you could try the cwm at my thread. I got it from the German and Russian forums which in turn got it feom the Chinese forums.
Sent from my SM-N9005 using Tapatalk
Click to expand...
Click to collapse
I saw that thread, but after reading, it seemed like it only worked on the 501.
You could give it a shot. At worst you reflash your stock recovery. Use Flashify, incredibly easy.
Sent from my SM-N9005 using Tapatalk

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