Is this an Android feature or is there something wrong with my 3G?
What happens is that whenever I am using my browser and searching on Google and my data connection shows 3G, when I click something it switches to H. Then, after page load, it changes back to 3G.
It makes me wonder if something is wrong with my 3G, or it is some battery-optimizing done by the phone.
Am I missing something? I did not notice this with my HTC Desire, it stayed on 3G or H until connectivity became worse or better.
perfectly normal,as 3G just being the band you can be called on,but once you start browsing and download stuf,your conection turns into HSPDA(thus the H) this is the data conection integrated in 3G(its faster than actual 3G)
you can see it as a download mode.
H is just a download indicator if you ask me.
thus maybe your HTC was downloading constand or had a lower refresh rate?
the described action you present is pretty common on my nexus S
Yes this is normal behaviour in stock Android.
Great to hear, thanks
Yeah it was constant on my HTC Desire, either on H or 3G. Apps were the same, so I don't think Desire did some background work that Nexus isn't doing.
I like it, thanks!
Every phone I've had from the Nexus One would do this - usually stock roms don't show an "H," only 3G, so you can't tell that it's switching between.
My HTC desire would switch between 3g and h on Orange but if I roamed on to t mobile it would permanently show as H. I guess it can also depend on the network.
Sent from my Galaxy Nexus using Tapatalk
You don't want it to stay on H .. it uses heaps more battery. There's also limited capacity on the network to support H connections. If everyone connected in H they would run out. It's meant to be temporary while you need to download a webpage, etc.
Mine is doing this too
Sent from my Galaxy Nexus using Tapatalk
I think there's been a thread on this already, but just to reiterate:
This is just a feature of UMTS and HSPA. Using HSPA takes more battery than UMTS or EDGE, so you only want it on when you are actively downloading or uploading data. Otherwise, UMTS serves just fine for background data and syncing.
When you're reading a web page (your example), there's not a lot of data being transfered, and you're sitting on UMTS. As soon as you click a link, it switches to HSPA, pulls down the info, and switches back again.
To my knowledge, stock android shows the difference between 3G and H pretty accurately. Carrier and/or manufacturer customized ROMs often tend to lead towards leaving "H"/"H+"/"4G" in the status bar more than 3G. If you watch your "about phone" > "status" screen, you'll see your phone switches between UMTS and HSPA quite often, even if the interface is preferring to show you "H". I think its mostly a marketing tactic that also reduces customer confusion.
So bottom line, you should be happy it switches to save your battery!
I have this and trust me, it cains battery.
I have never seen H in my Nexus S.
So this is good
Sent from my Nexus S using XDA App
gogol said:
I have never seen H in my Nexus S.
So this is good
Sent from my Nexus S using XDA App
Click to expand...
Click to collapse
That's because the Nexus S is a 3G phone that doesn't have the hardware required to transmit HSPA+ signal.
matt2053 said:
That's because the Nexus S is a 3G phone that doesn't have the hardware required to transmit HSPA+ signal.
Click to expand...
Click to collapse
The Nexus S is HSPA capable. just not HSPA+.
Actually HSPA doesn't use _more_ battery when you're camping. It only uses more battery while transferring, but even thats debatable. Eg 10mb downloaded in 1 minute over HSPA vs 5 minutes on 3G - which uses more battery to complete the task?
What does use extra battery is IF it has to switch to another tower to get you HSPA. However the network is pretty smart at choosing the most efficient thing to do, although it is biased to move people to towers which allow the most number of subscribers to be on the network. For example, if you are in a built up area and there are 3 towers within range, one perhaps right next to you, you may be switched to one further away so that one can service a user on the edge of its signal area. Although this uses more of your battery, it allows both of you to use the network rather than just 1.
Booo. So I just upgraded from a mt4g (the old one) to a GN, and now when I stream Sirius, it cuts out as it switches between H & 3G. I used Wifi today because it was driving me crazy. I wish there was a switch to turn off 4G, not 3G also.
Related
Hi all,
I"m new here, with a quick question based on my usage today on both the Bell and Rogers network.
I unlocked my HTC Desire Z this afternoon, and I tried it out on Rogers to see what the speeds were like. It has been an odd experience. Here's the background, and my question is below.
Background:
- Aside from being unlocked, it is as originally shipped from Bell (e.g. no root access, ROM hasn't been flashed etc.)
- APN settings were taken from Rogers' own website (e.g. using rogers-core-appl1.apn).
- Speeds tested in downtown Toronto.
Experience so far:
Bell
I get a solid HSDPA indicator all the time (save elevators etc., when there is no connection). I can remember seeing a 3G connection icon perhaps once on Bell since I got it last week. Speeds are very good, four to five bars most of the time
Rogers
I get a solid 3G icon almost all of the time, except when I'm using data, in which case it seems to switch over to the HSDPA icon. Literally, it will show a 3G, and then if I try to browse the web, the icon will immediately switch to an H from a 3G and the web page will load quite quickly.
I was concerned that it was dropping the HSDPA connection frequently, and using 3G instead -- changing towers constantly. So I tried speedtesting it. The results were completely opposite what I expected.
Speedtest Results:
Using the Speedtest.net app (from Ookla) testing against the same Oakville, ON server from Toronto, I'm getting speeds dramatically faster on Rogers. I did three speedtests for each network.
Bell:
Fastest Down: 3411 kbps Fastest Up: 1633 kbps
Slowest Down: 1969 kbps Slowest Up: 1331 kbps
Rogers:
Fastest Down: 5740 kbps Fastest Up: 3766 kbps
Slowest Down: 5405 kbps Slowest Up: 1551 kbps
Ping latency was generally slightly higher on Rogers than Bell.
Question
Does anyone understand why, on Rogers, the Desire Z would be showing a 3G until data is requested, at which time it swaps over to show an H icon (e.g. HSDPA), whereas on Bell, it shows a constant HSDPA connection?
I would have thought that it would be slower on Rogers since it was showing 3G and then the icon switches to H, but I'm guessing that the icon switch isn't really reflecting what's going on, since the speeds are faster when this icon switch occurs. Any ideas?
Many thanks in advance!
TF
Its not just the Desire Z but also most smartphones on rogers. i had a samsung galaxy and it did the same thing. However, (correct me out there, if im wrong) But i remember reading the HSDPA was inbetween 3g and 3.5g?...i dont remmeber but to me i know that Rogers is faster, my brother has a Bell phone and my speeds were always faster.
heres a bit of help i found
HSDPA is actually one of the 3G protocols.
In everyday language HSDPA is often referred to as much faster than (basic) 3G so I would call it much faster as well.
Click to expand...
Click to collapse
jark99 said:
Its not just the Desire Z but also most smartphones on rogers. i had a samsung galaxy and it did the same thing. However, (correct me out there, if im wrong) But i remember reading the HSDPA was inbetween 3g and 3.5g?...i dont remmeber but to me i know that Rogers is faster, my brother has a Bell phone and my speeds were always faster.
Click to expand...
Click to collapse
Not sure there really is a 3.5G as such, but if there is, then HSDPA is it. It provides faster speeds than the standard 3G (UMTS) protocols. There's also HSPA+ coming out, which is even faster. HSPA+ isn't 4G, although confusingly some carriers in the US (T-Mobile I think ?) are referring to it as such.
On O2 in the UK, I get the same effect, holds at 3G then switches to HSDPA when in use. There doesn't seem to be any latency when switching and if it can't achieve HSDPA it remains at 3G. Speedtest returns about 1.5-2 Mbit which is normal.
I can only imagine its a power saving feature as from experience with the Touch Diamond 2 / Touch Pro 2, having HSDPA enabled sucked battery life significantly. I don't remember this happening on those phones either. Seems like a good idea, but would be nice to choose (always on, auto, always off)
I actually used to disable HSDPA and use 3G exclusively and consistently got 2-3 days out of both phones with moderate use. I never missed it.
Craig
craiglay said:
I can only imagine its a power saving feature as from experience with the Touch Diamond 2 / Touch Pro 2, having HSDPA enabled sucked battery life significantly. I don't remember this happening on those phones either. Seems like a good idea, but would be nice to choose (always on, auto, always off)
Click to expand...
Click to collapse
That must be it -- interestingly, I went into the About Phone > Network > Signal Strength menu to check it out. When the icon is showing 3G, the "Mobile network type" is UTMS. When data is being transmitted, the icon immediately switches to H and the "Mobile network type" reports HSDPA.
Very cool -- I'm going to see if this -- by itself -- extends my battery life tomorrow. Thanks for the feedback!
TF
Just FYI -- there has been a dramatic improvement in my battery life on Rogers, compared to what I was experiencing on Bell. Typically, I would be at about 40% battery life left at this point in the day (presumably because I was constantly connected to HSDPA with Bell). Whereas I'm at 80% battery life left with the Rogers 3G connection, and I've still been connected to Wi-Fi for the past five hours and browsing reasonably heavily.
Thanks for your help in sorting this out everybody.
TF
Interesting, as Bell has rolled out several HSPA+ areas, Toronto being one of them, and Rogers still only has HSPA.
What I found odd on my DZ (still on Bells network) is that my Network Mode is GSM / WCDMA auto (never seen this on any other handset I've hand that's been HSDPA) and I understand that the HSDPA networks here are CDMA with a GSM overlay (ie, the need for a SIM card, etc) and I frequently see my icon changing from 3G to H (again, this is only on my DZ), but Bell only has a CDMA EVDO 3G network and the HSPA "3G+" network, there's not really a GSM enabled 3G network.
I'm confused, as on my Telus Milestone, it's constantly H, never once seen 3G appear on it, and Telus and Bell share their network.
Maybe I'm just horribly misinformed.
I donno if it is just me but I seem to be getting ridiculously slow 3G speeds here on my unlocked Desire Z using Rogers. I go to school in Hamilton at McMaster and most of the times the 3G is nigh on unusable because of its speeds. I don't know if it is an app or anything that has caused it because it was never slow when I first got the phone.
I am running the virtuous rom 0.72 atm. I do have half a mind to just factory reset the device adn see if that fixes the issues however I really don't want to lose all of my contacts and other settings that I have on this device.
TravelFiend said:
Rogers
I get a solid 3G icon almost all of the time, except when I'm using data, in which case it seems to switch over to the HSDPA icon. Literally, it will show a 3G, and then if I try to browse the web, the icon will immediately switch to an H from a 3G and the web page will load quite quickly.
Click to expand...
Click to collapse
The same thing happening to me with Galaxy S,and this started a few days ago.
I unlocked my phone and I am using it on Telenor Serbia a and past two weeks it was just H all the time,now it's 3g all the time and when I start browsing it switch to H again and it work well,but why do that,should I be concern?
VladaP85 said:
The same thing happening to me with Galaxy S,and this started a few days ago.
I unlocked my phone and I am using it on Telenor Serbia a and past two weeks it was just H all the time,now it's 3g all the time and when I start browsing it switch to H again and it work well,but why do that,should I be concern?
Click to expand...
Click to collapse
For me on O2 UK, it depends on the area.. Sometimes its solid 3G, sometimes solid H and sometimes 3G when idle, H when in use.. I guess its the base station software / hardware..
Craig
HAK Devil said:
I do have half a mind to just factory reset the device adn see if that fixes the issues however I really don't want to lose all of my contacts and other settings that I have on this device.
Click to expand...
Click to collapse
If you've snyced with google then your contacts will just sync back. And I go to school at Mac as well and usually the speeds are really slow inside any buildings... If i don't have full bars then the speed will be crap, otherwise they are fine. But I am on Fido, not Bell.
Also, I thought that Bell didn't have a 2G GSM network? If that is the case then that could be why only H would be appearing...
craiglay said:
For me on O2 UK, it depends on the area.. Sometimes its solid 3G, sometimes solid H and sometimes 3G when idle, H when in use.. I guess its the base station software / hardware..
Craig
Click to expand...
Click to collapse
But why this start to happen two day ago and not before... Should I call my operator or it's up to my phone. Maybe to do factory reset of change rom...
VladaP85 said:
But why this start to happen two day ago and not before... Should I call my operator or it's up to my phone. Maybe to do factory reset of change rom...
Click to expand...
Click to collapse
It could be anything to be honest.. Your operator could have updated the base station.
It seems the phone is designed to do this probably to save power, HSDPA is battery intensive so having the phone in 3G while in standby probably saves quite a bit of power..
You could try emailing HTC with the question before your operator.
Regards
Craig
TravelFiend said:
Just FYI -- there has been a dramatic improvement in my battery life on Rogers, compared to what I was experiencing on Bell. Typically, I would be at about 40% battery life left at this point in the day (presumably because I was constantly connected to HSDPA with Bell). Whereas I'm at 80% battery life left with the Rogers 3G connection, and I've still been connected to Wi-Fi for the past five hours and browsing reasonably heavily.
Thanks for your help in sorting this out everybody.
TF
Click to expand...
Click to collapse
Have you switched your phone to stay in umts only to get this dramatic battery gain?
craiglay said:
It could be anything to be honest.. Your operator could have updated the base station.
It seems the phone is designed to do this probably to save power, HSDPA is battery intensive so having the phone in 3G while in standby probably saves quite a bit of power..
You could try emailing HTC with the question before your operator.
Regards
Craig
Click to expand...
Click to collapse
My phone is Samsung I9000 Galaxy S So maybe I will email Samsung...
Thanks,
Regards
From my understanding
GSM = 1G
GPRS= 2G = G
EDGE = 2.5G = E
UMTS = 3G = 3G
HSDPA/HSDUPA/HSPA+=3.5G = H
Since Rogers has all the above mentioned transceiver systems you will see that mostly on the Rogers network Android phones tend to stay on UMTS=3G switching to H only when more data throughput is required.
The battery life is much better on UMTS vs HSDPA hence you will get a better battery life on Rogers vs Bell.
Bell only has a HSDPA/HSPA+ network hence you will only see H
I am not claiming to be a 100% on this
Just my 2 cents by putting together 1 and 1
xdjneo said:
GSM = 1G
GPRS= 2G = G
EDGE = 2.5G = E
UMTS = 3G = 3G
HSDPA/HSDUPA/HSPA+=3.5G = H
Since Rogers has all the above mentioned transceiver systems you will see that mostly on the Rogers network Android phones tend to stay on UMTS=3G switching to H only when more data throughput is required.
The battery life is much better on UMTS vs HSDPA hence you will get a better battery life on Rogers vs Bell.
Bell only has a HSDPA/HSPA+ network hence you will only see H
I am not claiming to be a 100% on this
Just my 2 cents by putting together 1 and 1
Click to expand...
Click to collapse
Nearly there (source Wikipedia),
GSM is 2G
GPRS is 2.5G
EDGE is 2.75G
UTMS is 3G
HSxPA is 3.5G
I would put HSPA+ as 3.75G as its slightly different to HSxPA but would settle for 3.5G
Broadly speaking battery life reduces the higher the generation but I think UTMS can be more efficient than 2.xG sometimes. (NOT HS... which is generally terrible all over hence the behaviour between 3G and H)
I always used to disable HSxPA because of the battery life, its just not easy on this phone. It requires root and editing a prop file..
Craig
As you may know desire has a built in feature that monitors when you do need 3g connection and when not, so when you do not need it it automaticly switches to 2g. I have also read somewhere that this feature consumes less battery then being always on 2g. Is that true? I still heard a lot of people that are most of the time on 2g while they do not browse the internet, reporting decent battery lives.
So, as the title says, which is better?
2g uses less battery than 3g. Use 2g when not using data for the best battery life.
Whoever said that 2g and sometimes 3g uses less battery that 2g only needs to go back to school, its mathematically impossible if 3g uses more battery.
Sent from my HTC Desire using XDA App
lvnatic said:
As you may know desire has a built in feature that monitors when you do need 3g connection and when not, so when you do not need it it automaticly switches to 2g.
Click to expand...
Click to collapse
are you completely sure about that? my phone seems to be always in 3G as long as it is available and switchs to 2G if it cant get a 3g connection.
anyway, 2G is the best option battery wise.
there is a video from google i/o 2k9 talking about this. I think it's this one : http://developer.android.com/videos/index.html#v=OUemfrKe65c
I have used both modes for some weeks, but i didn't see any difference.
http://forum.xda-developers.com/showthread.php?t=688492
How about this? Does it apply to desire as well? I am curently using gsm only when im not browsing the net.
2g only will use the least battery.
Auto is great but the issue is that it will preferentially seek 3g. To seek 3g more power is required. (Now this is a negligible amount on its own). However if comparing the battery use in only a 2g area the 2g phone will last longer.
Sent from my HTC Desire using Tapatalk
if you have signal i recommend to use 3g. the cells needs more power to have/transmitt fast data connections like hdspa and in that case the cellphone need less battery to connect to it. in Romania the network it's kinda new hardware, because we use cellphones later than anyone else and the tech was envolved when we first install the network, but remember if your cellphone go from 2g to 3g often, this will consume a lot of power.
Robert A said:
if you have signal i recommend to use 3g. the cells needs more power to have/transmitt fast data connections like hdspa and in that case the cellphone need less battery to connect to it. in Romania the network it's kinda new hardware, because we use cellphones later than anyone else and the tech was envolved when we first install the network, but remember if your cellphone go from 2g to 3g often, this will consume a lot of power.
Click to expand...
Click to collapse
So you recommend wcdma only? Even when I don't use the internet? Its true that I have signal most of the time, but I am on "gsm only" all the time, switching to wcdma only when I browse the net.
I would recommend GSM auto (PRL) from the testing menu ( *#*#4636#*#* ) then in phone information. Your phone will still use 3G but only when the signal is strong. Otherwise it will prefer 2G.
WCDMA preferred will try to force 3G even when the signal is weak. Consuming more battery.
Sent from my Desire HD using XDA App
2G only uses the least power.
3G only uses moar power.
Constant switching uses the most, it peaks at 600mA battery drain in the process.
3G only will only give you signal outages, therefore I would not recommend it. It is not widespread as GSM signal is.
Oh I finally know how to acces PRL options, thanks. But regarding this, I found this thread on the nexus one section, which says wcdma prl is better. Any of you know how accurate that is?
Edit:
sheek360 said:
He mentioned that gsm auto prl will save the user a bit more power because it wont force the phone to continuasly hunt for a stronger signal. Typically this option gives our n1's a weaker signal and slower data speed. But he said it depends on our network in our city.
Click to expand...
Click to collapse
Nvm, it wasn't battery related anyway. And I found what I needed. Thanks a lot.
Im back to gsm only, gsm auto prl didn't seem to be better in terms of battery saving.
Anybody got a Galaxy Nexus on T-Mo USA with the H icon switching to the 3G icon back & fourth on a daily basis? Seems like a software bug to me or could this be normal? I'm in a solid 4G area, never seen this before.
Thanks.
Sent from my GN
Its normal and exactly what its intended to do.
Your phone connected to umts which is 3g and will only change to hspa "4g" when pulling data.
Sent from my Galaxy Nexus using xda premium
This is just what the phone is supposed to do. UTMS (3G) uses less power then HSPA (H), so the phone switches when there's data to be transferred, but otherwise stays at UTMS when there's nothing going on. Most ROMs just don't have a different icon for HSPA and UTMS, because HSPA hasn't always been "4G," so there's been no reason to notify the user that anything is different when it switches.
OK appreciate the information
Sent from my GN
hello, I was just wondering if there was any app that will allow me to turn off hspa+ on my GSM galaxy nexus? I prefer using 3G only
thank you
anyone?
10 char
haven't seen this anywhere except on original samsung galaxy S, where dialling in a code allowed you to change the data connection speed.
http://forum.xda-developers.com/showthread.php?t=837716
seems you can only choose either 2G or 3G/HSDPA data but not specify one.
Hspa+ is 3G.
Sent from my Nexus in Texas.
@rbiter said:
Hspa+ is 3G.
Sent from my Nexus in Texas.
Click to expand...
Click to collapse
HSPA+ is 3.5G
Lol. I know that but for all intents and purposes, who is going to weed out UMTS and hspa and hspa+ just so you can have UMTS only? It's 3G no matter how you slice and dice it.
Sent from my Nexus in Texas.
in an area of low signal, you're going to spend more power trying to have a stable "H" connection rather than "3G". Back in the SGS1 days i remember it did actually have a little but noticeable effect on battery.
if you watch careful, when you have a low "H" signal it will once in a while drop back to 3G...3G is way better than Edge or GPRS but not as fast as HSDPA which goes to 20+ mbps, whereas 3G AFAIK hovers around 700-800kbps.
zerozoneice said:
in an area of low signal, you're going to spend more power trying to have a stable "H" connection rather than "3G". Back in the SGS1 days i remember it did actually have a little but noticeable effect on battery.
if you watch careful, when you have a low "H" signal it will once in a while drop back to 3G...3G is way better than Edge or GPRS but not as fast as HSDPA which goes to 20+ mbps, whereas 3G AFAIK hovers around 700-800kbps.
Click to expand...
Click to collapse
3g / umts limit is 384 kbps. I'm having a hard time seeing tgere would be any difference in power drain in terms of low signal seeing as its the same exact air interface (wcdma) for all of them.
Its like saying wifi b drains less power than wifi g in low signal. If its true someone would have to explain cause i dont understand how it could be...
RogerPodacter said:
3g / umts limit is 384 kbps. I'm having a hard time seeing tgere would be any difference in power drain in terms of low signal seeing as its the same exact air interface (wcdma) for all of them.
Its like saying wifi b drains less power than wifi g in low signal. If its true someone would have to explain cause i dont understand how it could be...
Click to expand...
Click to collapse
yea 384kbps.
dunno the exact reason but i know it had results at least on stock SGS roms...couple of %, not much...but something.
probably radio uses more power to keep a good (faster H) connection in a low signal area before giving up and falling back on 3G.
Hi,
I have had my One x since this Monday, constantly using mobile data because i didnt have WiFi at hand. I noticed my battery dropping super fast for no real reason. What i also noticed was the icon all the time switching back and forth between 3g and H ... I dont really know why this is happening, does anyone have an idea? Now that im using WiFi my battery seems to drop a lit less quickly..
Offtopic question about the battery: when i got the phone i didnt let it charge before i started using it, i just let it drop from the 20 % to 0 and then charged it... Did this maybe mess things up?
Thanks a lot
Sent from my HTC One X using XDA
Same here. I'm having the same issue. I'm using mine on AT&T.
I have seen my signal go 3G to H+ a lot but my battery is no worse than my GNex. I am also on ATT.
Sent from my HTC One X using XDA
Generally speaking, my Android phones have shown a 3G symbol when not using data, and will switch to H when starting to transfer data. This is when you have 3G network coverage.
A bigger battery drain is normally when you have poor signal, and the phone is always trying to search for a signal, or when it is constantly going between 2G and 3G/H.
Being on wifi is definitely easiest on the battery though.
Sent from my HTC One X using xda premium
Mmm thats weird never seen that happen with my previous phones... I always thought the arrows on the side indicated wether or not they were using data or not... The arrows beside the 3g flash as well when using data...
I hope the update comes soon. Because i dont really like the battery life atm
Sent from my HTC One X using XDA
.26 firmware has major batt issues... You guys are not alone...I'm getting more pissed by day...
mr.boonet said:
Mmm thats weird never seen that happen with my previous phones... I always thought the arrows on the side indicated wether or not they were using data or not... The arrows beside the 3g flash as well when using data...
I hope the update comes soon. Because i dont really like the battery life atm
Sent from my HTC One X using XDA
Click to expand...
Click to collapse
See if you get the arrows beside the 3G symbol. I'm pretty sure on mine, as soon as the arrows come along, it switches to an H.
Sent from my HTC One X using Tapatalk
You are completely right about the arrows thing. I just can't imagine the switching being better for the battery or whatever... Seems to me that just keeping it on H would be less hard on the battery than constantly switching between 2 radio's.
Or is it 1 and the same radio?
mr.boonet said:
You are completely right about the arrows thing. I just can't imagine the switching being better for the battery or whatever... Seems to me that just keeping it on H would be less hard on the battery than constantly switching between 2 radio's.
Or is it 1 and the same radio?
Click to expand...
Click to collapse
Am pretty sure 3G and H are the same thing, so it won't affect battery drain. It's not like switching between 2G and 3G, which I think causes more battery drain because your phone is searching and switching. I'm sure there's some expert here that can clear it up.
Sent from my HTC One X using Tapatalk
Mm ok indeed, but i guess when the engineers at htc/google do it like that, and it's not only happening on my device, there should be quite a good reason for it
Sent from my HTC One X using XDA
I think some confusion is present here.
3G data and HSDPA data are both 3G technologies on the same frequency bands. However HSDPA uses MORE power because it bonds on multiple channels to get the bandwidth up. When the phone is doing very low amounts of data, or no data, it will revert to 3G only to save power. It will ONLY go to HSDPA when it is obvious there is much data to be transferred! This behaviour is correct and appropriate.
Just thought I would add there is only one mobile network radio in our phone so there will never be any radio switching issues.
M.
Sent from my HTC One X using xda premium
jonstatt said:
I think some confusion is present here.
3G data and HSDPA data are both 3G technologies on the same frequency bands. However HSDPA uses MORE power because it bonds on multiple channels to get the bandwidth up. When the phone is doing very low amounts of data, or no data, it will revert to 3G only to save power. It will ONLY go to HSDPA when it is obvious there is much data to be transferred! This behaviour is correct and appropriate.
Click to expand...
Click to collapse
That makes absolute sense. Except that what tends to happen (with me at least) is that it switches multiple times while I am trying to load something which interrupts the transfer again and again. Sometimes I get 'Connection error' messages while trying to download apps from Google Play. If I keep trying, it will download successfuly after a few tries, when it can stabilise long enough on either 3G or H. And it isn't a situation where I'm on the edge of either because this happens no matter where I am. Any insight on this?
jonstatt said:
I think some confusion is present here.
3G data and HSDPA data are both 3G technologies on the same frequency bands. However HSDPA uses MORE power because it bonds on multiple channels to get the bandwidth up. When the phone is doing very low amounts of data, or no data, it will revert to 3G only to save power. It will ONLY go to HSDPA when it is obvious there is much data to be transferred! This behaviour is correct and appropriate.
Click to expand...
Click to collapse
It's called "fast dormancy," do a search on XDA or Google. It saves battery provided the carrier you're using supports fast dormancy. It's erratic when they don't and should be turned off. AT&T supports fast dormancy so that shouldn't be the cause for anyone on their network to have abnormally high battery usage. I’ve used an i9100 for a year all over AT&T’s network and never had an issue with fast dormancy active. And it works exactly like described above. In certain parts of the country (EG: Louisiana) my battery drains 25-50% faster but that's due to signal not fast dormancy.
you guys also have to calibrate your battery in order to get a decent battery life
Fast dormancy can be disabled by going to service menu by typing *#*#9900#*#*
Worked with most of my devices. Donno it will work with this device as i dont have one now.