Isn't fast dormancy detrimental to users who use data on the go frequently? I mean, if I'm on my phone quite regularly, constantly using data, locking, unlocking and using data some more, wouldn't the change from 3G to H+ drain more battery than it saves?
rickytenzer said:
Isn't fast dormancy detrimental to users who use data on the go frequently? I mean, if I'm on my phone quite regularly, constantly using data, locking, unlocking and using data some more, wouldn't the change from 3G to H+ drain more battery than it saves?
Click to expand...
Click to collapse
Basically, FD (fast dormacy) enabled, means that your internet connection will be at max speed, of course depending on your carrier speed.
Some ppl say when FD disabled, you get better battery life, but from my experience, nothing changes, you only get a super slow internet connection.
So if you use your internet connection more frequently, just leave it as it is.
Cheers.
I thought it referred to the switch between 3G and H+ to save battery. Can you link me to a proper description?
rickytenzer said:
I thought it referred to the switch between 3G and H+ to save battery. Can you link me to a proper description?
Click to expand...
Click to collapse
Search the forum it is there.
Theoretically it saves power by using slower data connection ( if your carrier supports it), but then again if you have wakelocks and they use data connection or you use data connection every action will take you double the time since connection is slow, do the math.
Not all networks use FD .
jje
Absolutely, and I'd really like to know if any Indian carrier supports it or not?
Sent from GT-I9100
Related
Hi all.
I have had my N1 for a little over a week now, and the battery life i guess is normal for a pda with this power etc, but i read over on modaco that by changing over the settings from CDMA preferred to CDMA only, actually increased the battery life loads! So I tested this and indeed it does nearly double my battery life..
I have also now read from an add for the new HD2 that the battery life is again increased by swithching over to GSM only! Look at the battery details quoted for the HD2 below.
Talk Time –
Up to 320 minutes for WCDMA
Up to 380 minutes for GSM
Standby Time –
Up to 390 hours for WCDMA
Up to 490 hours for GSM
I am now testing GSM only, and guess that the battery life is going to increase yet again, awesome..
this looks promising but T-Mobile has lots of 3G dead spots scattered around even a major city like NYC, meaning if I would set the phone to WCDMA only and put it in my pocket, I would not receive any calls or data when not in a 3G area.
gadjet said:
Hi all.
I have had my N1 for a little over a week now, and the battery life i guess is normal for a pda with this power etc, but i read over on modaco that by changing over the settings from CDMA preferred to CDMA only, actually increased the battery life loads! So I tested this and indeed it does nearly double my battery life..
I have also now read from an add for the new HD2 that the battery life is again increased by swithching over to GSM only! Look at the battery details quoted for the HD2 below.
Talk Time –
Up to 320 minutes for WCDMA
Up to 380 minutes for GSM
Standby Time –
Up to 390 hours for WCDMA
Up to 490 hours for GSM
I am now testing GSM only, and guess that the battery life is going to increase yet again, awesome..
Click to expand...
Click to collapse
u do know that with WCDMA you will get far better speeds than just plain old gsm right?
Setting it to WCDMA only will actually drain your battery faster if you are in an area with poor 3G. So only use it when you have optimal 3G conditions.
Amon_RA said:
Setting it to WCDMA only will actually drain your battery faster if you are in an area with poor 3G. So only use it when you have optimal 3G conditions.
Click to expand...
Click to collapse
Faster yes. But noway worth the hassle of toggling it on or off. Unless you don't like to charge your phone each night then its not a prob. I use 3G/wifi,music,games and my battery easily survives a day or two.
Cheers..
Amon_RA said:
Setting it to WCDMA only will actually drain your battery faster if you are in an area with poor 3G. So only use it when you have optimal 3G conditions.
Click to expand...
Click to collapse
Thanks for that Amon_RA, and a personel thanks for for RA-nexus-v1.5.3
I guess my phone usage is split 50/50, i.e 50% at work with a max 3G signal, and 50% at home with a weak 3G signal. I definately saw a massive increase in my battery life when on WCDMA only, so changing to GSM should benefit me even more. I live in the UK and am on the Orange network, overall the 3G coverage is not to bad.
I will report back after a couple of days testing.
Good news for me: there is basically no 3G coverage here so guess I'll be GSM all the time. Getting my N1 this afternoon.
Is it just me or am I not seeing a 200% increase? 20% maybe.
how do i actually choose which band to use? been trying and didnt see any options.
in your dialer dial *#*#4636#*#* then go to phone information > set it to WCDMA only (3G only). Default is WCDMA preferred.
thanks! guessed i learned something new today
Hi again everyone..
Well one day into testing GSM only, what a difference in the battery life..
This is my default setting definately when on holiday to save on power, and when I am not using data roaming. But the speed difference is bummer, i.e GSM only gives me GPRS slow-ish speed, and not fast speeds that 3G gives you, if you are in a 3G area that is.
I have now found an easier way to switch bands, well at least between CDMA preferred and GSM only mode's, and you don't have to switch off your N1 or even put it into flight mode anymore.
1-Swap your band to GSM only mode via phone keypad.
2-When you need 3G speed if available just go to settings/wireless & network settings/mobile network settings, and untick box to use only 2G networks.This re activates the CDMA preffered mode.
3-When you want to go back to GSM only mode, re tick 2G box as detailed in 2 above.
If you use GSM, and by extension GPRS, most if not all of your calls will go to voicemail. 2G only means your phone can do either voice OR data at a particular time - eg If you're browsing or reading messages or syncing you wont get calls. Conversely if you're talking on the phone you can't browse the web. This is why 3g is so much better - you can do both simultaneously.
You may already be aware of this but I thought I'd mention it just in case you weren't.
SC
ScaredyCat said:
If you use GSM, and by extension GPRS, most if not all of your calls will go to voicemail. 2G only means your phone can do either voice OR data at a particular time - eg If you're browsing or reading messages or syncing you wont get calls. Conversely if you're talking on the phone you can't browse the web. This is why 3g is so much better - you can do both simultaneously.
You may already be aware of this but I thought I'd mention it just in case you weren't.
SC
Click to expand...
Click to collapse
actually when android receives or makes a call on EDGE / GPRS it automatically turns off data to allow the call to get through.
This is a must solution if you are on AT&T, with the phone only being gsm capable for me it has increased my battery life by I say 20-30% and going into settings also and switching to only use 2g networks works amazing.
I wonder if there will ever be an AT&T nexus AT&T thats what all my family use..
-Charlie
melterx12 said:
actually when android receives or makes a call on EDGE / GPRS it automatically turns off data to allow the call to get through.
Click to expand...
Click to collapse
AT&T doesn't support this (or didn't a year ago when I last looked into it) for incoming calls, so be careful if you're using AT&T (of course, if you're on AT&T there's no other option).
T-Mobile supports this, so it'll work fine.
melterx12 said:
in your dialer dial *#*#4636#*#* then go to phone information > set it to WCDMA only (3G only). Default is WCDMA preferred.
Click to expand...
Click to collapse
thanks alot for this code it helped
I dont know why everyone is treating this GSM vs 3G battery life stuff as if its something new..
Those who remember, the iPhone 3G suffered from the very same issue...
wooo hooo!
Poll in..
Finished testing..
GSM only mode is a definate winner as far as battery life goes, but the down side side is the slow data speed side, and the fact that you can't recieve calls when say surfing, or when data is being downloaded in back ground, it just goes to voice mail... Try it.. change to GSM mode, phone yourself via a land line while surfing etc and see your calls go to voice mail.
The easy switching via the 2G mode does help, and you can swap as and when required, but as alot of my current N1 apps connect to the web for updates etc (beautiful widgets for weather updates, e-mail checking etc) I will stick to CDMA only mode for now, and just use GSM mode when I go on me hols abroad when I don't use data at all.
gadjet said:
Finished testing..
GSM only mode is a definate winner as far as battery life goes, but the down side side is the slow data speed side, and the fact that you can't recieve calls when say surfing, or when data is being downloaded in back ground, it just goes to voice mail... Try it.. change to GSM mode, phone yourself via a land line while surfing etc and see your calls go to voice mail.
The easy switching via the 2G mode does help, and you can swap as and when required, but as alot of my current N1 apps connect to the web for updates etc (beautiful widgets for weather updates, e-mail checking etc) I will stick to CDMA only mode for now, and just use GSM mode when I go on me hols abroad when I don't use data at all.
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Click to collapse
Receiving calls during 2D data transfer is a feature that needs to be supported by your mobile network. Your mobile operator probably needs to implement a Gs interface and change the Network Operation Mode. That way your phone can be paged during 2G data transfer and you'll be able to receive the call.
guys, I've been struggling with you all that my SGS2 is jumping from 3G <-> H <-> H+ and I don't know if it costs extra battery, but I'm kinda tired with the 1-2 seconds lag whenever I wanna use the data (like browsing).
I would like to know if there's a way to use ONLY HSPA but not the 3G? I know there is a way to disable HSPA leave only 3G, but I want it vice versa, at the end of the day it's an expensive device and I want to use fast connection on it. my old HTC Desire stayed connected to H at all time and I felt good about it.
well, any idea?
If I'm not wrong, I think it's a good thing that it keeps switching between HSPA and 3G. If it needs to download/upload large amount is data, it'll use HSPA and it'll switch back to 3G for normal usage which I think save battery in long term.
Sent from my GT-I9100 using XDA App
WCDMA
Have you tried using WCDMA only mode? This still lags?
For your question, dial *#301279#, change HSPA revision and release 5(HSDPA only). To return to previous setting, release 6.
HSDPA drains the battery a lot. 3g helps when in standby.
washburn111 said:
HSDPA drains the battery a lot. 3g helps when in standby.
Click to expand...
Click to collapse
This is what I believe as well. The phone should switch to 3G when sleeping / stand-by to save battery... but for some reason, each time I wake my phone up, I can see 'H' on the Data Connection instead of '3G'. If I unlock my screen and wait 5-10 secs, Data then switches to 3G. But if I lock it and unlock again, it's back to 'H'. This has been draining my battery more than when I have WiFi connected.
I've searched for this issue on google, this whole forum but just can't find a post discussing about this issue. Maybe I didn't use the right keywords... I've been searching: "samsung galaxy s2 sleep 3g hsdpa" , something along those lines. Of course I tried combinations like just sleep 3g or sleep hsdpa etc.
If there is a discussion regarding this, could you point me to it please or suggest keywords to search for.
Fast Dormancy
ShadowFlare said:
This is what I believe as well. The phone should switch to 3G when sleeping / stand-by to save battery... but for some reason, each time I wake my phone up, I can see 'H' on the Data Connection instead of '3G'. If I unlock my screen and wait 5-10 secs, Data then switches to 3G. But if I lock it and unlock again, it's back to 'H'. This has been draining my battery more than when I have WiFi connected.
I've searched for this issue on google, this whole forum but just can't find a post discussing about this issue. Maybe I didn't use the right keywords... I've been searching: "samsung galaxy s2 sleep 3g hsdpa" , something along those lines. Of course I tried combinations like just sleep 3g or sleep hsdpa etc.
If there is a discussion regarding this, could you point me to it please or suggest keywords to search for.
Click to expand...
Click to collapse
Are you talking about fast dormancy?
When Hspa is turned on when you unlock your phone, maybe there is an app or a widget that calls out for an internet connection? Those widgets that refresh in a couple of minutes maybe? Because in my experience H is only called when data is needed.
I'm aware of Fast Dormancy and the way it works, but definitely not what causing it to stay idle in H mode. I've switched it off before and still the phone wakes up to H signal.
One app I know to use the Data connection every hour is Beautiful Weather widget. I've disabled refresh-on-wake so it will only update hourly.
I'm confirmed that my hometowm support the 21M hspa+ network,but why my gs3 can't lock the hspa+ network.When I open the data,H+ just showed at a very short time,and then it turns to H.
And I moddified the build.prop hsxpa=2,and flash the modem.but it just can't lock:crying:who can help me. thanks
I'm pretty sure that phones will only go to H+ if they actually need it. Hence you'll find that if you start requesting data, it will switch over to H+ again, and then revert to basic H when it's done. Probably not an issue.
anthropolyte said:
I'm pretty sure that phones will only go to H+ if they actually need it. Hence you'll find that if you start requesting data, it will switch over to H+ again, and then revert to basic H when it's done. Probably not an issue.
Click to expand...
Click to collapse
thanks,I know what you said,but I want to ask is that even it starts requesting data,it just stay at H,not H+.It just show at a very short time ,then it turns to H and alaways to be H.
In which case it's a problem with either your network provider or your phone. I'd suspect your provider primarily; give them a call and see if they can help.
anthropolyte said:
In which case it's a problem with either your network provider or your phone. I'd suspect your provider primarily; give them a call and see if they can help.
Click to expand...
Click to collapse
thanks,but gs2 can lockI'll call them tommorow
anthropolyte said:
In which case it's a problem with either your network provider or your phone. I'd suspect your provider primarily; give them a call and see if they can help.
Click to expand...
Click to collapse
and I have tried my white one and the blue one,it all can't,may be I should connect the network engineer
To expand to what anthropolyte said, the GS3 has a Fast Dormancy mode, where it'll connect to H+ network when is truly needed (heavy surfing/streaming, etc), and when the phone is mainly idle or doing light/periodical syncing, it'll switch back down to H or even 3G to conserve battery. As far as I know, Fast Dormancy must be supported by your carrier (which it does in your case) and must have a compatible phone to toggle between different network mode (GSM/HSPDA/UMTS, etc) to increase battery life.
lude219 said:
To expand to what anthropolyte said, the GS3 has a Fast Dormancy mode, where it'll connect to H+ network when is truly needed (heavy surfing/streaming, etc), and when the phone is mainly idle or doing light/periodical syncing, it'll switch back down to H or even 3G to conserve battery. As far as I know, Fast Dormancy must be supported by your carrier (which it does in your case) and must have a compatible phone to toggle between different network mode (GSM/HSPDA/UMTS, etc) to increase battery life.
Click to expand...
Click to collapse
but I have tried a lot of network things to do,such as online video,downloading sth,and etc.I saw there is nothing can even use the hspa+ network.I'll connect the network engineer and I think this is their problem.btw thanks a lot,and I'm a chinese user
mine alternates between 3g and H+ too. It bumps it up to H+ when I start using apps. The slight lag before it kicks in is not a bad trade off for better battery life.
anthropolyte said:
In which case it's a problem with either your network provider or your phone. I'd suspect your provider primarily; give them a call and see if they can help.
Click to expand...
Click to collapse
I called them,they told me nothing about how to deal with it or they didn't want to amdit this problem,and they told me to ask samsung for help.....
when I was in their business hall,I tested a i9100 and my 9300 white and blue,when i9100 requests data,9100 change to H+,but all of my 9300 can't change to H+,just stay at H,my god.....:crying:
HTCHD2ireland said:
mine alternates between 3g and H+ too. It bumps it up to H+ when I start using apps. The slight lag before it kicks in is not a bad trade off for better battery life.
Click to expand...
Click to collapse
Same here. 3G <---> H <---> H+ but when I start using apps like Youtube, H+ kicks in and everything is ok...
I am using SG S II I9100 running on ICS 4.0.4 for a while and am not happy abt the standby time my phone gives. I have changed the battery, serviced it, changed charger, Switch to GSM network, nothing seem to work.
My doubt is can Battery drain because of SIM card ?? coz mine is a relatively old one. Are there any other complications?
I have read threads here at the forum but nothing seem to help me coz most of it are regarding rooting the phone
Can anyone please help me with my problem??
Search "better battery stats" aplication here. Find out what application which drain your battery and disable it
anang1979 said:
Search "better battery stats" aplication here. Find out what application which drain your battery and disable it
Click to expand...
Click to collapse
Ok i ve installed it n used it for a few days n i don seem to notice the difference..
My suspicion in on the sim card.. coz mine in pretty old..
does it affect the battery by any means??
Try this : GSAM Battery Monitor from the play store
SIM doesn't do anything to the battery.
How is the signal reception in your area?
Switch off Fast Dormancy.
Switch to GSM only mode if you do not use 3G data.
alwaysshri said:
Try this : GSAM Battery Monitor from he play store
SIM doesn't do anything to the battery.
How is the signal reception in your area?
Switch off Fast Dormancy.
Switch to GSM only mode if you do not use 3G data.
Click to expand...
Click to collapse
now that u have mentioned it I live in an area of minimum cross section
sometime the network is too hard to catch..
Fast Dormancy?? what is that??
I always use Auto network selection mode switching between 3G n 2G..is that ok??
Shrinivas13Parthasarathy said:
now that u have mentioned it I live in an area of minimum cross section
sometime the network is too hard to catch..
Fast Dormancy?? what is that??
Click to expand...
Click to collapse
Fast Dormancy: A Samsung specific feature (?) for faster state transitions to DCH.
Most probably this wont be supported by network operators.
To disable:
Type *#9900# from numpad.
In the menu that pops up, check current state of fast dormancy.
If enabled, click to toggle it.
Shrinivas13Parthasarathy said:
I always use Auto network selection mode switching between 3G n 2G..is that ok??
Click to expand...
Click to collapse
Again, this causes the phone radio to scan both 2G and 3G frequencies.
If you don't use 3G data plans, force the phone to be in 2G always. Its more battery efficient.
If can turn flight mode on at nights when you go to sleep. If don't get good signal, it's a drainer to have it constantly searching for more bars.
Betterbatterystats show what's going on with your battery, it doesn't improve it per se.
Sent from the little guy
alwaysshri said:
Fast Dormancy: A Samsung specific feature (?) for faster state transitions to DCH.
Most probably this wont be supported by network operators.
To disable:
Type *#9900# from numpad.
In the menu that pops up, check current state of fast dormany.
If enabled, click to toggle it.
Again, this causes the phone radio to scan both 2G and 3G frequencies.
If you don't use 3G data plans, force the phone to be in 2G always. Its more battery efficient.
Click to expand...
Click to collapse
thnx man... that was really helpful..
another question though..
in less than 2 hrs the battery power shrinks by 10% or more..
do u think its the same problem as u said about the tower issue u pointed out?
Maybe is all I can say. Can you try out and check if it helps?
Sent from my GT-I9100
any one knows how can i disable 3.5G/3.7G/ HSDPA /HSUPA/ HSPA data connection , i want only Normal 3G data connectoin
because i already have poor internet connection due to network operator policie , and my subsecribed bandwidth , so my phone just, use HSPA but no speed is needed , so no battery drain is needed .
so i can save battery when i am surfing the internet
-------------
my phone
ray st18i
stock .13
rooted + supercharged
You won't save any battery by that.
And I seriously doubt you wish to use 3G only. 3G is very slow, compared to HSPA speeds. I do not think any of the operators actually limits the speed to 3G speed (384 Kbit/s, for comparison, HSDPA is 14 Mbit/s).
i know that
Someguyfromhell said:
You won't save any battery by that.
And I seriously doubt you wish to use 3G only. 3G is very slow, compared to HSPA speeds. I do not think any of the operators actually limits the speed to 3G speed (384 Kbit/s, for comparison, HSDPA is 14 Mbit/s).
Click to expand...
Click to collapse
i know that ,but, my network operator already have very poor connection , no more than 512Kbit/s , i use it only for chat on mobile data ,
Someguyfromhell said:
You won't save any battery by that.
And I seriously doubt you wish to use 3G only. 3G is very slow, compared to HSPA speeds. I do not think any of the operators actually limits the speed to 3G speed (384 Kbit/s, for comparison, HSDPA is 14 Mbit/s).
Click to expand...
Click to collapse
btw, i have a question...: does ''use only 2g networks'' saves some battery?? b'cuz i activate that if iam over my limt, bcuz my provider reduce my surfspeed to 64kbits/s and i thought, that didnt affect my surf speed and saves battery?? right or not?
thanks in advance
Using 2G does save battery in some cases. In city areas, it is not noticeable. From my own experience, I can say, that if I use 2G, the signal is strong all the time (operator's 2G antenna radius is larger than 3G), however with 3G, it goes up and down at my home. If signal is strong all the time, phone has to use less battery to keep connected. If signal is weak, phone needs to use more battery to keep the connection.
Long story short - Yes, it can save battery, however in city conditions, it is hard to notice.
bejunk said:
btw, i have a question...: does ''use only 2g networks'' saves some battery?? b'cuz i activate that if iam over my limt, bcuz my provider reduce my surfspeed to 64kbits/s and i thought, that didnt affect my surf speed and saves battery?? right or not?
thanks in advance
Click to expand...
Click to collapse
yeah you are right.. 2G network consumes very less battery than 3G