I notice that at times, mobile network type changes between HSDPA and UMTS. When I go into settings>status I can see this switching back and forth. I can be in a prefect location with great signal and in an area with HSPA and still switches back and forth. This doesn't do it all the time.
Sent from my GT-P7510 using XDA Premium App
it is my understanding that our phones fall back to UMTS (old skool 3g) when no data is being used. I think it is doing this to improve battery life.
kletiz said:
it is my understanding that our phones fall back to UMTS (old skool 3g) when no data is being used. I think it is doing this to improve battery life.
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Click to collapse
Correct. Stock unmodified ROMs lie and claim HSPA+/HSPA even when in vanilla UMTS mode. Some other ROMs accidentally claimed "UMTS" when in HSPA+ modes.
Reality is - UMTS (3G) when idle, HSPA/HSPA+ when active and transferring lots of data.
Perfect. Makes sense, this can be to the great battery life we are getting.
Thanks for the info and did test that when using data it does switch to the faster connection. Well at least that is what AT&T wants you to believe that they have 4G. . I only average around 2.5Mbps download in Southern California. Hopefully soon we at least can get around 5Mbps download.
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Related
I just updated to trigger 2.1 and now my data thing goes between 3G and H. What is H and what's the difference between them?
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http://www.differencebetween.net/technology/difference-between-3g-and-hsdpa/
alecjake said:
I just updated to trigger 2.1 and now my data thing goes between 3G and H. What is H and what's the difference between them?
Sent from my SGH-T959 using XDA App
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Click to collapse
http://en.wikipedia.org/wiki/Umts - when the icon shows 3G this is what it shows
http://en.wikipedia.org/wiki/HSPDA - when the icon shows H
HSPDA is able to provide faster speeds, but I believe it's highly dependent on how strong your signal is
Not sure myself, but if you're on Tmobile or ATT it pribably stands for HSDPA. 3G would mean WCDMA I believe.
Sent from my Vibrant using XDA App, Bionix-v 1.21
Long story short... it depends on how the ROM has been programmed to display what protocol your phone is using for data traffic.
3G just means regular UMTS 3G data
H means that it is is using HSPA, a faster protocol for UMTS 3G.
It doesn't mean that you're taking advantage of the faster speeds... that is dependent upon a slew of other factors.
Just to clear some things up. 3G is an all encompassing term, that INCLUDES the following technologies:
UMTS
HS(D/U)PA(+)
W-CDMA
EV-DO Rev 0/A/B
LTE
WiMax
As noted in the post immediately above me, the symbol it shows, depends on how the rom was customised to show each icon for the corresponding protocol.
If you don't believe me, that's cool, but go look at the ITU declinations on what is and is not 3g. There is no 4G CDMA technology. Pure CDMA is dead in the long run. All the current 3G GSM technologies, use the WCDMA or OFDMA air interface.
OFDM is not 3G
Tarzanman said:
OFDM is not 3G
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This is false. WiMax uses OFDM and LTE uses OFDMA (the same, but for multi-user as opposed to single). WiMax as 802.16e is NOT 4g. Neither is anything currently available and anything being deployed in the next 2-3 years.
I didn't say it was 4G. I said that OFDM was not 3G.
It isn't. Taking the broad view, its pretty clear to me that code div mult access is what differentiates 3G from its predecessors.
With 4G it will be orthogonal frequency
Here's a mathematical formula that pertains to all Vibrant ROMS that use an H and/or 3G
3G = H
The answer is, there is no difference except for the way they look. Both are really only using 3g.
The phone switches from hsdpa to umts back and forth all day according to how you use the internet. It automatically switches from hsdpa to umts when it is not browsing the web. That is-- if you live in an area with hsdpa. In which case it would stay on umts all day. Which would make your battery pretty happy. My battery hates hsdpa
Sent from my SGH-T959 using XDA app. If I helped, hit the thanks button!
treyvaporizer said:
The phone switches from hsdpa to umts back and forth all day according to how you use the internet. It automatically switches from hsdpa to umts when it is not browsing the web. That is-- if you live in an area with hsdpa. In which case it would stay on umts all day. Which would make your battery pretty happy. My battery hates hsdpa
Sent from my SGH-T959 using XDA app. If I helped, hit the thanks button!
Click to expand...
Click to collapse
This is false. Your phone jumps on the preferred network. Usually, unless you have specified, it sits on the fastest preferred network available. As such, battery consumption improves when you disable 3g (which is HSPA AND UMTS).
Tarzanman said:
I didn't say it was 4G. I said that OFDM was not 3G.
It isn't. Taking the broad view, its pretty clear to me that code div mult access is what differentiates 3G from its predecessors.
With 4G it will be orthogonal frequency
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Click to collapse
If it's not 3g then what is it? OFDM is used on both current 3g and future 4g (LTE-Advanced) systems.
Paging Dr B said:
Here's a mathematical formula that pertains to all Vibrant ROMS that use an H and/or 3G
3G = H
The answer is, there is no difference except for the way they look. Both are really only using 3g.
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Click to collapse
hi there,
I believe what you say and if it is just a matter in which the ROM is programmed, why does my stupid S3 still switches from H+ to 3g?
I dont know and I cant tell if either of the two is faster than the other, but it is annyoing the constant switching
Thanks
Davide
banzayworld said:
hi there,
I believe what you say and if it is just a matter in which the ROM is programmed, why does my stupid S3 still switches from H+ to 3g?
I dont know and I cant tell if either of the two is faster than the other, but it is annyoing the constant switching
Thanks
Davide
Click to expand...
Click to collapse
H+ = HSPA+ = 3g. There are different names for the different 3g evolutions and technologies, but they are still 3g. It keeps hopping between the networks because you're unfortunately in an area with bad coverage for the faster network.
On the vibrant theres an option to run on I think what is called edge network, I could be wrong, does verizon have such a network to run off of my buddies vibrant's batteries life is unreal...well aolt better than mine.???
Thx
Sent from my SCH-I500 using XDA App
Edge is the 2g network, when you drop a 3g signal your phone gets stuck on Verizon's version of it... I guess it would improve battery life but don't try to any browsing on it...
Sent from my SCH-I500 using XDA App
Edge is a type of GSM network, Verizon uses CDMA, so no, you can't use EDGE.
The equivalent to EDGE in Verizon would be the 1X data connection, as opposed to the 3G (EVDO) connection. I know we can disable mobile data with Froyo, but I don't think there's any way (without some kind of hack) to force the phone to always use a 1X data connection.
Sent from XDA Premium on my Super Clean Fascinate
It's somewhere in the hidden menus.
GSM phones, in general, get much better battery life. It has to do with the network. Coverage vs Battery life it's a toss up
A small observation i have made thus far with running code's Kang
There seems to be alot of bouncing between 3G and H+. Im not sure what the implications are in terms of bat drain or issues, however just somthing i have observed that i do not running a similar OS on my Desire HD.
My area we are not yet H+ however i hold steady at h+ most all the time.
Drew
All 4G phones have H+ constant unless they fall on EDGE
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ngocdao said:
All 4G phones have H+ constant unless they fall on EDGE
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I understand this, however its bouncing between H+ and 3G constandly like once ever other min, which seems odd
Drew
drewdatrip said:
I understand this, however its bouncing between H+ and 3G constandly like once ever other min, which seems odd
Drew
Click to expand...
Click to collapse
I know devices typically switch if something is actively going on (an active data session). Are your data transmission arrows lighting up when showing H and nothing when showing 3G? If so, I think this is typical.
ngocdao said:
All 4G phones have H+ constant unless they fall on EDGE
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Click to collapse
Wrong. Phones only use HSPA when transferring data, they idle in vanilla UMTS.
AT&T mangles their frameworks to report everything as H+ even when it's not actually in HSDPA+ mode.
CM7 is just reporting the truth that AT&T's mangled framework hides from you.
Entropy512 said:
Wrong. Phones only use HSPA when transferring data, they idle in vanilla UMTS.
AT&T mangles their frameworks to report everything as H+ even when it's not actually in HSDPA+ mode.
CM7 is just reporting the truth that AT&T's mangled framework hides from you.
Click to expand...
Click to collapse
Its bouncing both in and outside of data consumption. I dont find this to be the case Running CM7 or MIUI on my Desire HD
Just an observation
Drew
Different RIL.
And our RIL might have the same minor issue that the Infuse RIL did in which HSPA+ was reported as only UMTS - so if you were in a non-+ HSPA mode it would be H, if you were in 3G it would be 3G, if you were in HSPA+ it would be 3G. This was a display error... Do you notice any significant differences in actual data speed performance between CM7 and stock firmware?
(Actually, you could still see slow data if the CM7 tree uses older TCP buffer size values.)
Mine GS3 is always connected the mobile networks with H - it will flick up to H+ is that is available. While the phone is dormant should it drop down to 3G to save power?
It doesn't, so I'm trying to work out it there is something syncing in the back ground keeping the H connection alive or if Fast Dormancy should be turned off.
Thanks
I'm on T-Mobile (UK)
Idle (fast dormancy) is a HSPA tech and thus does not drop out of Hspa - at least according to the graph; in reality the connection is cut.
Sent from my GT-I9300 using xda premium
d4fseeker said:
Idle (fast dormancy) is a HSPA tech and thus does not drop out of Hspa - at least according to the graph; in reality the connection is cut.
Sent from my GT-I9300 using xda premium
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So this means it stays on H, but with no connection, it reconnects when it needs to?
Thanks
I am on T-Mobile uk and am using the newest JB leak. Mine fluctuates between H and H+ when using data and shows 3g when data not being used.
bigr1979 said:
I am on T-Mobile uk and am using the newest JB leak. Mine fluctuates between H and H+ when using data and shows 3g when data not being used.
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Click to collapse
See this is what I thought should happen. Mine is just sitting here on H, doing nothing. I'm not too concerned, because battery is great, but I'd like to resolve it if I can!
thanks
It just depends on your network & towers.
For years at home my Samsung phones (S1, S2 & now S3) have been on 3g when idle but over the last month it stays on H. This is due to a tower upgrade.
At a friends place it idles at H+ and at my parent's house it idles on 3g. So nothing to worry about.
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rowlers said:
See this is what I thought should happen. Mine is just sitting here on H, doing nothing. I'm not too concerned, because battery is great, but I'd like to resolve it if I can!
thanks
Click to expand...
Click to collapse
slighlty off topic, but what speeds do you get whilst on H+, i get between 2 and 4 Mbps
Regards
Jack
JSale said:
slighlty off topic, but what speeds do you get whilst on H+, i get between 2 and 4 Mbps
Regards
Jack
Click to expand...
Click to collapse
I normally can get 3 Mbps max, the upload is shocking though normally 400kbps max
I'm in a decent LTE area (DFW). Why can I have crappy 4G data and can't load anything. Then I dial *#*#4636#*#* and change to LTE ONLY and it loads LTE and extremely fast, but obviously can't accept calls. Why does the LTE/GSM not just stick on LTE instead of going 4G -_-
Sent from my HTC One using XDA Premium 4 mobile app
Do you have the Google edition one?
Sent from my HTC One using Tapatalk
Yes, more info about the device please.
dotson817 said:
I'm in a decent LTE area (DFW). Why can I have crappy 4G data and can't load anything. Then I dial *#*#4636#*#* and change to LTE ONLY and it loads LTE and extremely fast, but obviously can't accept calls. Why does the LTE/GSM not just stick on LTE instead of going 4G -_-
Sent from my HTC One using XDA Premium 4 mobile app
Click to expand...
Click to collapse
No I have the official T-Mobile version, it is running the latest firmware and radio as of last week. Running AOSP ROM AICP.
I mean it could possibly be due to them working on towers but it still seems weird that the phone wouldn't try to connect to LTE when ever it is possibly available. It might be a placaebo effect, but it just seems like the phone has been having way more delays loading things, even if the ping is low in Speed Test.
dotson817 said:
I'm in a decent LTE area (DFW). Why can I have crappy 4G data and can't load anything. Then I dial *#*#4636#*#* and change to LTE ONLY and it loads LTE and extremely fast, but obviously can't accept calls. Why does the LTE/GSM not just stick on LTE instead of going 4G -_-
Sent from my HTC One using XDA Premium 4 mobile app
Click to expand...
Click to collapse
When the phone is set to LTE/GSM it will monitor signal thresholds to try and keep you from having a poor experience on LTE at the fringe. So that if it detects your LTE signal is low it will move over to 4G or even 2G to try and provide you a better experience. When you set it to LTE only then it stays on LTE as long as you have usable signal.
T-Mobile probably has the threshold set too conservative, but that doesn't explain your poor experience on 4g (HSPA). I live in DFW and my HSPA service is fast.
Im in Dallas. Main travel area is old east dallas and north central / north east dallas..
I can tell you that im happy with both HSDPA+ and LTE with them.
on the rare occasion i have had a reception / speed issue i find that power cycling my phone fixed it. Also make sure if you do that you have FastBoot disabled.
Thats under power settings, make sure its not checked.
IAmSixNine said:
Also make sure if you do that you have FastBoot disabled.
Thats under power settings, make sure its not checked.
Click to expand...
Click to collapse
What's wrong with using Fast Boot?
it doesnt shut down apps properly..
its similar to hibernation.
Good to know, thanks.