So here is a question, I reside in a city that is not even on the list of getting LTE in next couple of years. So my question is that if I change the setting under Network Mode to CDMA only vs. CDMA/LTE would that save me some battery (since it's not constantly scanning for LTE)?
And are there any side effect to CDMA only when it comes to data quality?
Thanks in advance
I switched mine to CDMA only within a few minutes of turning it on. I haven't had any problems with data. Couldn't say about battery savings, though, as I have no reference point.
Yeah it should save some battery since it's not searching for available lte.
sent from my L9HUNDRED
It increased my battery considerably. I was in a fringe area for lte last weekend and turning off LTE gave me considerably more battery.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
Curious if its worth saving battery life to just keep the network on CDMA only during the day ?
I came from Sprint and they had the 4G toggle on most Android devices, I never used it, maybe 05% of the time, WiMax was such a battery hog, and so spotty to ever a hold a solid connection anyways, just seemed like a waste. But Sprints 3G really sucked too, like 1xEdge speeds.
Does keeping the Nexus on LTE cause signal issues ? Meaning does it jump back and forth between 3G and 4G causing dropped calls if you on the phone and move into a non LTE area ?
Thanks
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I only bother to switch mine off when I am on my days off from work. I get great 4g signal at work but none at home. I haven't payed close enough attention to battery usage to notice a difference though.
As far as battery life goes, I've found there isn't much difference at all if LTE is on/off. It's the screen that kills the battery. That being the case I don't bother switching it off anymore.
I leave LTE on all day and my battery lasts all day. As long as that's the case I don't pay any attention to battery life. I also never leave 4G coverage though.
I am new to Verizon. Live in the Chicago area, I would assume a big market like this has solid LTE coverage ?
I just know from Sprint, keeping the phone on 4G was a fast battery kill. If left on WiMax you were lucky to get 4 hours on a full charge.
Hopefully LTE is better than WiMax on the battery, I know for sure it way better network coverage.
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Zorachus said:
I am new to Verizon. Live in the Chicago area, I would assume a big market like this has solid LTE coverage ?
I just know from Sprint, keeping the phone on 4G was a fast battery kill. If left on WiMax you were lucky to get 4 hours on a full charge.
Hopefully LTE is better than WiMax on the battery, I know for sure it way better network coverage.
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Yeah better coverage and probably easier to find a signal due to frequency differences.
I use ihtfp69's LTE toggle to turn off LTE/CDMA to just CDMA when I leave work. I live in a pretty poor 3g signal area, so leaving LTE on just drains my battery unnecessarily. I turn it on when I get into the LTE area, works great since it's a widget.
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Usually the issue, IMO, is if you are moving between an LTE area and a non-LTE area or if you're at the edge of LTE coverage, so your phone loses its LTE connection, searches, reconnects, etc.
If you've got a solid LTE connection and it's uninterrupted you won't drain battery as fast.
As to whether LTE usage drains your battery faster than 3G usage... I can't say.
I usually leave my lte on unless I know I have to push my battery... coming from sprint evo then photon which are complete battery hogs on 4g due to the joke they call 4g coverage...
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The key issue is whether you have a weak or non-existent LTE signal. I find that in some areas such as these if the phone is on LTE I do not get 3G service, or the service goes on and off. If I switch to CDMA only 3G will work much better. I've only used the phone for limited times in areas with strong 4G so I couldn't compare batter life when set for 4G.
I toggle lte off when home, no 4g signal does drain my battery. At work with great 4g signal I toggle it back on. Gives me an excuse to look at the beautiful battery draining screen.
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I have the Verizon LTE Nexus. Curious about battery drain between CDMA only vs LTE/CDMA ?
Let's say phone is sitting on my desk, in 3G only it shows half bars, then switch to 4G it shows full bars.
If phone just sits there, screen off, does the battery drain more on 4G ? Or it doesn't matter at idle when not touching/using the phone ?
Obviously if you are in a poor 4G area battery will drain higher due to it looking for the LTE network right ? But in Chicago and burbs, LTE seems pretty solid, especially at my office area, full bars on 4G.
Opinions ?
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i think the phone will use more power at 4G idle even with full bars, simply because LTE chipsets are still far too new and not yet mature. CDMA has been tweaked for years and is more power efficient.
give LTE a few years for chipsets to get smaller, and more power efficient.
The last LTE phone I had was the bionic and in the Chicago area where LTE is plentiful I had no problems leaving it on all the time. Your mileage may vary of course but by Wrigley I didn't notice too much drain
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Not sure if this was posted already but looking through the menus I found how to easily disable LTE. It's not around here and I read having it enabled eats battery. My HSPA speeds are 5-10 megs which is more than enough for what I do.
Anyway:
Settings
Connections Tab
More Networks
Mobile Networks
Network Mode
Choose GSM/WCDMA (auto connect). 2nd one from the top.
It seems this device sucks up battery at twice the rate of my former Note 2. Maybe this will help.
MisterEdF said:
Not sure if this was posted already but looking through the menus I found how to easily disable LTE. It's not around here and I read having it enabled eats battery. My HSPA speeds are 5-10 megs which is more than enough for what I do.
Anyway:
Settings
Connections Tab
More Networks
Mobile Networks
Network Mode
Choose GSM/WCDMA (auto connect). 2nd one from the top.
I've seems this device sucks up battery at twice the rate of my former Note 2. Maybe this will help.
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Thanks! this will help alot for sure!
My battery has been pretty decent for the past two days, but I'll try this n see if it gets better. BTW, anyone can show me a pic of their home screen that has the 4G lte icon?
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yes , and also can disable the data connection to save it.
4G
MMakoto said:
My battery has been pretty decent for the past two days, but I'll try this n see if it gets better. BTW, anyone can show me a pic of their home screen that has the 4G lte icon?
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It just says 4G when you have LTE on the Galaxy S4. At least for Sprint anyway. I use Cyanogenmod so mine does say LTE. For AT&T I know for a fact that it says LTE on the top right of the 4G icon.
Just and observation on LTE and battery life if you are in an area that has been refarmed to get LTE but may not have the strongest signal for it yet.
I get constant LTE signal wherever I go in Baltimore. Download speeds are great. But the signal isn't super strong yet. So my phone does a lot of pinging the towers to stay connected. That is the yellow signal in my battery graph. This causes a decent amount of battery drain while the phone is asleep.
But 3G signal is great. That is the green line in the battery graph. You can see that when I switched to 3g (or HSPA as it really is) the battery drain while idle reduced dramatically.
So if you are in an area like this and you really need the battery to last longer, put it on 3G and it should help a lot. At least until T Mobile increases the LTE coverage, which I am sure they will.
And for when you need the LTE speed, I have an LTE button on my quick settings panel to activate it so I still get the speed when I need it, but not the battery drain when I don't. (Note, I'm using cm10.1 rom. I am not sure if the TW roms have that quick setting button available. But it can be done in settings.)
This option is not for everyone. But if you are not a heavy data user like me it might be great for you.
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Skipjacks said:
Just and observation on LTE and battery life if you are in an area that has been refarmed to get LTE but may not have the strongest signal for it yet.
I get constant LTE signal wherever I go in Baltimore. Download speeds are great. But the signal isn't super strong yet. So my phone does a lot of pinging the towers to stay connected. That is the yellow signal in my battery graph. This causes a decent amount of battery drain while the phone is asleep.
But 3G signal is great. That is the green line in the battery graph. You can see that when I switched to 3g (or HSPA as it really is) the battery drain while idle reduced dramatically.
So if you are in an area like this and you really need the battery to last longer, put it on 3G and it should help a lot. At least until T Mobile increases the LTE coverage, which I am sure they will.
And for when you need the LTE speed, I have an LTE button on my quick settings panel to activate it so I still get the speed when I need it, but not the battery drain when I don't. (Note, I'm using cm10.1 rom. I am not sure if the TW roms have that quick setting button available. But it can be done in settings.)
This option is not for everyone. But if you are not a heavy data user like me it might be great for you.
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How do I put it in 4gHSPA +
Awesome advice
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thetbg said:
How do I put it in 4gHSPA +
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There are many apps in the Play Store that allow you to do that.
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Never thought to have data go to 3g and lower.. I've always used tasker to disable... no off screen email but I go in and manually check it anyways so it works for me. I get 2.5 hours out of 1 percent when my device sleeps.