Database Users

Evo battery life trick read

For those of you having battery issues I found a way to DRAMATICALLY improve the battery life.
I tried this and I have seen a huge improvement.
First things first, go into Settings> About Phone> Battery> Battery Use> Cell Standby. Assuming your phone has been on, or off the charger for ~10 minutes, it should show Time Without Signal at around 50%.
Next thing, press HOME, and bring up the dialer. Dial *#*#4636#*#* (Do not press "Call"). After a second, it should bring up the "Testing" menu.
Go into Phone Information, press MENU, and tap "select radio band." You should experience a Force Close, don't panic, this was supposed to happen. Scrolling down shows that the preferred network type is GSM auto (prl).
What this means is that even though you are connected to a CDMA network, your phone is trying to find a GSM network, preventing the radio from sleeping, and causing excessive battery drain.
Remedy this by tapping GSM auto (prl), and changing it to CDMA auto (prl).
Now your done, your TWS should drop dramatically, and you should experience much better battery life!
Note: You need to do this every time you reboot.
I wish there was a way to make an application to toggle this thing on and off so you don't have to do it every time you reboot the phone.

Going to try this for tomorrow and see how my battery life is. Seems silly that with all the customization HTC did to the OS they missed this detail.

seems weird; has anyone confirmed if this works?
-m

Just checked mine and it was already CDMA(auto).

btw for what it's worth, my EVO has been off the charger for ~2 hours, and the cell standby details just shows "time on: 2h 19m". Mine is also defaulting to 'CDMA auto (PRL)'
Perhaps a recentl prl update fixed this?
-m

Nice find though - the battery history tab (especially the all time tab) is awesome..
For instance, I've been seeing my GPS turn on and stay on while indoors.. according to these stats, the 'movies' app is the one that was using it the most..
-m

I found mine in CDMA already too

Mine was GSM my son's was on cdma, we both did the prl updates and both of us did the sd card update as well.
I guess some phones were on cdma by default some weren't.
Maybe thats why some people are calling other crazy for the battery drain.

thanks...interesting find...mine was on gsm. everytime i reboot?! damn.

Mine was set to CDMA with Cell standby of 48%.

mines was on gsm also..but i rebooted and it stood on cdma..it didnt default back

There is an app in the market called "network" that is basically a shortcut to this menu.

diomark said:
Nice find though - the battery history tab (especially the all time tab) is awesome..
For instance, I've been seeing my GPS turn on and stay on while indoors.. according to these stats, the 'movies' app is the one that was using it the most..
-m
Click to expand...
Click to collapse
You could just use spare parts from the market place it shows you all of that

Mine was on GSM. I'll see if my battery life is any better tomorrow.

Mine was set to GSM. The phone came from Google I/O so maybe that was a bit different? I'm excited to see how this improves it! If it does...good find! If not...still probably a good thing to change!

Thank you so much for this, it seemed to fix my sporadic signal issue!!!!

just changed mine to CDMA thanks

spurnout said:
Mine was set to GSM. The phone came from Google I/O so maybe that was a bit different? I'm excited to see how this improves it! If it does...good find! If not...still probably a good thing to change!
Click to expand...
Click to collapse
Mine was set to CDMA

Thanks for the tip...Mine was set to GSM.

Mine was already set to CDMA auto (prl). I saw another option was for CDMA only. I wonder if there would be any difference with that selected?

[Q] Time without signal > 50%

This is an issue that a lot of Hero users had. I was fortunate enough to not experience it with the Hero, but my current time without signal is 52% on my Epic. If I remember correctly, it was a PRL problem, but it might also be the radio. It would be the cause of serious battery issues. I've attempted updating my profile and PRL to no avail. Is anyone else having time without signal issues?
To check, go to settings -> about phone -> battery use -> cell standby.
Sent from my SPH-D700 using XDA App

I thought it was just a reporting issue
Sent from my SPH-D700 using XDA App

No. I remember what it was now. It was that the Hero wasn't set to use CDMA towers and was searching for GSM towers for some reason. Something to do with the fact that the Hero was originally a GSM phone, which would make sense here. Someone in the thread that was created just a bit ago suggested it had something to do with the PRL update, which is possible, because I did it and that's when I started getting bad battery life and a high percentage of time without signal.
I've been having a hell of a time with my data connection today, which would explain my poor battery.

I've got a very high time w/out signal as well... I'm surprised this hasnt gotten more attention. Its a huge battery drain.

...
I've got 50% time without signal on mine. It seems likely that the searching for GSM towers could be happening on this phone as well because of all the material that crossed over from the international versions. Is there a way to check and/or fix this problem and get the phone to only search for the CDMA towers?
Thanks,
-Rob

I've been trying to set the network mode to cdma auto using the network app i downloaded from the market. I dont think its fixing the issue though...

Strangely enough this is a similar issue I have seen with the Samsung Intercept. Especially having a hard time with keeping the data connection...
-CC

clockcycle said:
Strangely enough this is a similar issue I have seen with the Samsung Intercept. Especially having a hard time with keeping the data connection...
-CC
Click to expand...
Click to collapse
Haven't have this issue and I live in Puerto Rico. We have 5 carriers on this tiny island and Sprint is the only one with CDMA.

I think I figured it out. I set my network to cdma auto and my time without signal dropped to 3%. Battery drain seems improved in the short term...

Did you set yours up to WCDMA only? If I went WCDMA Preferred, I can see it was trying and failing to connect to GSM.

HeroHTC said:
Did you set yours up to WCDMA only? If I went WCDMA Preferred, I can see it was trying and failing to connect to GSM.
Click to expand...
Click to collapse
I set it to CDMA auto
I dont think WCDMA is available in the US.

...
Can you please elaborate a bit on how to change network preferences?
Thanks,
-Rob

TheRob44 said:
Can you please elaborate a bit on how to change network preferences?
Thanks,
-Rob
Click to expand...
Click to collapse
Go to the android market and search for an app called "Network"
Open up the app, you should see WCDMA Preferred in a drop down box near the bottom of the screen. Select that and change it to CDMA auto.
Exit the app.
Your Time without service should drop really low (mine went to 3%)
I've had the app behave strangely and revert my settings. I'm paranoid so i've been checking it pretty often. I'm not sure if there is a way to make this change permanent. I dont know if it reverts when the phone is rebooted.

The way that the problem was solved on the Hero was by accessing a system menu through a ##CODE## code and telling it to prefer CDMA towers. It was defaulted, for some, to GSM. Because I never had this issue, I don't know a whole lot about it. I know that ##CODE## codes are not available on this phone, though, so we might be out of luck until we can get into some kind of dev menu, I think. The app fix mentioned above sounds janky as hell to me, though, so I'll avoid it for now.
My phone has a hell of a time holding on to a data connection right now, but Juice Defender is really helping that not absolutely kill my battery. Aside from this one concern, my battery is actually lasting a surprisingly long time. I was expecting it to die nearly twice as fast as my Hero, but it is definitely giving it a run for its money. I'm very pleased with the Epic

...
I followed your directions. Got into Network, changed the dropdown box to CDMA Auto (PRL) and then hit the home button. Nothing changed, so I went back into the app to check if it stuck and it was back at WCDMA Preferred. Am I missing a step to make the change stick or something?
Thanks,
-Rob

TheRob44 said:
I followed your directions. Got into Network, changed the dropdown box to CDMA Auto (PRL) and then hit the home button. Nothing changed, so I went back into the app to check if it stuck and it was back at WCDMA Preferred. Am I missing a step to make the change stick or something?
Thanks,
-Rob
Click to expand...
Click to collapse
I just did it multiple times. =)

Mine is not sticking either...ah well..
Hero used to be
#*#*4636*#*#

I'm going to try the suggested fixes but we need a permanent solution. This drain is horrible, check out my battery usage from today in this pic. I really like this phone but I'm going to have to return it if this keeps up.

richse said:
I'm going to try the suggested fixes but we need a permanent solution. This drain is horrible, check out my battery usage from today in this pic. I really like this phone but I'm going to have to return it if this keeps up.
Click to expand...
Click to collapse
Yea, Thats what mine looked like until I fixed it with the Network app.
Yes, I have been playing lots of games/angry birds

I have been trying to use the Network app that people are suggesting but I am getting some weird issues. When I open the Network app it says I am on "WCDMA preferred" but then if I just let it sit for about 15-30 seconds it changes to "Unknown" without my pressing anything. I tried setting it to "CDMA only" and to "WCDMA only" but it doesn't save either setting. If I exit and reopen the program it goes back to "WCDMA preferred" and then changes itself to "Unknown" after a short duration. Anyone else have a problem like this? Any ideas?

[Q] Turning off "cell" radio NOT wireless 3G radio...

Hello everyone..
here is my problem....
I no longer have cellular service from sprint, lets say sprint disconnected it...
ok so i have my evo and a bunch of things i can still do with it.
but! why is it that i cant turn off just the "cellular" radio without it going into plane mode? keep in mind im not talking about "go into wireless mode and uncheck mobile" that only turns off 3g and leaves the phone COMPLETELY ON.
i mean, i dont have the service why do i still have to put it in airplane mode (and on evo's you cant use bluetooth while on that mode)
is there an apk that i can delete so the "phone" feature is gone and no longer shows my the strength bars without the need for airplane mode? its annoying to have to turn on my "PMP" and have to see the airplane on there.

you can use titanium backup to uninstall the phone, then keep mobile networks unchecked and your good to go
edit I think it may still search for signal

NewZJ said:
you can use titanium backup to uninstall the phone, then keep mobile networks unchecked and your good to go
edit I think it may still search for signal
Click to expand...
Click to collapse
do you know the apk's to uninstall?

edwinh2209 said:
do you know the apk's to uninstall?
Click to expand...
Click to collapse
installing them wouldn't solve your problem, now I'm thinking delete the prl and set it to roaming only but that would drain the battery fast, that's a toughy, lemme think about it a bit
edit it would be easy if you didn't need bluetooth

Nope, there's no real way to do it. You bought a phone, not an iPod. Live with Airplane mode or get service.

you could kill the radio process in os monitor, unsure of its exact name though
edit ill 2nd dr on this one, theres no good way

Get the app "Network" by Mangelow. It has a button to turn off just the radio.

kcrudup said:
Get the app "Network" by Mangelow. It has a button to turn off just the radio.
Click to expand...
Click to collapse
tested, works

thank you for all who helped.

drmacinyasha said:
Nope, there's no real way to do it. You bought a phone, not an iPod. Live with Airplane mode or get service.
Click to expand...
Click to collapse
Lol thank you for you useless and helpless post. I suggest if u don't have anything to contribute just read and stay off the thread?

kcrudup said:
Get the app "Network" by Mangelow. It has a button to turn off just the radio.
Click to expand...
Click to collapse
I was looking for something like this too. In an area with very little signal, having the radio on is just annoying because it never gets signal, so it drains battery forever, even more because it is constantly scanning. This is perfect for that.
Now if someone could make a widget for this switch...

How does the battery drain? If sprint disconnected your phone it won't keep searching for a network. I have my old phone that laid for over 5 days without charge when I hot my evo... that was both the moment and intercept
Sent from my PC36100 using Tapatalk

bgchz said:
How does the battery drain? If sprint disconnected your phone it won't keep searching for a network. I have my old phone that laid for over 5 days without charge when I hot my evo... that was both the moment and intercept
Sent from my PC36100 using Tapatalk
Click to expand...
Click to collapse
It will still actually be connected to the network, you just wont be able to make calls or get texts. This is required for all cell phones, so you can still call 911, or call the carrier to re-activate the phone if you ever want to.

battery tip,

Here is a battery tip
Disable Data on ur phone, If ur not surfing the web (turn on data when u need it )
Calls and Text still go thru
Hold down power and the menu will come up then click on deactivate network
OR
This also can be done in extended controls Or Quick Settings
MAKES A BIG DIFFERENCE !
so far i got
14h 44m unpluged and i have 46% Left on Axura 2.2.5.9 ( i knoe 2.2.6 is out i just find 2.2.5.9 better)

Wow. You're a genius! Haha. This has been known for awhile due to obvious reasons. In fact there are apps that will turn your data off/on whenever your screen is sleeping/awake.

joe.kerwin said:
Wow. You're a genius! Haha. This has been known for awhile due to obvious reasons. In fact there are apps that will turn your data off/on whenever your screen is sleeping/awake.
Click to expand...
Click to collapse
i knoe but do u really need data when u make a call ?

No, just turn it off manually. Those automatic apps are pretty pointless imo. You don't use data every time the screen is on, they just use more battery by constantly switching and giving the user no freedom.

Kevinmac2049 said:
i knoe but do u really need data when u make a call ?
Click to expand...
Click to collapse
dunno about anyone else but when I push send to make a call my data icon turns off and disappears until I hang up.

I don't think GSM supports simultaneous data and voice.

I think powering off the phone when not making calls will save even more battery.
Seriously, I use my phone for a lot of things that require background data. Seems silly to me to turn off something critical for me using my phone just to save some battery.

so far on nero 5 i havent even reconditioned ( im going to do it anyways later) , but its given me over 16 hours of battery, and thats all i need, i just need 10 hours max, from the time i wake up to the time i go to sleep, if it can give me that im good.

donalgodon said:
I don't think GSM supports simultaneous data and voice.
Click to expand...
Click to collapse
yea it does. Only if you have 3g or H. if your on edge then no so . Try it make a call and open the browser it WILL WORK(or your money back ) O! and CDMA is the ones that wont let you use data and talk at the same time

T.C.P said:
yea it does. Only if you have 3g or H. if your on edge then no so . Try it make a call and open the browser it WILL WORK(or your money back ) O! and CDMA is the ones that wont let you use data and talk at the same time
Click to expand...
Click to collapse
Yup, I will be one the phone while looking up information on the browser.

Hey if u deactivate ur phone it will save your battery life.
Seriously though I am using juice defender on my evo and it basically turns data off while ur screen is off. It has worked pretty well. It was off the charger from 730am yesterday till 11pm last night and I still had 55 percent. Of course I worked all day and my phone saw very little use yesterday.
Sent from my PC36100 using XDA App

Using Mate 8 in the USA on AT&T....shows I have 4G, but will not connect/load

I can't connect to or load anything, even though the status bar says I'm on 4g. Any ideas?

brian85 said:
I can't connect to or load anything, even though the status bar says I'm on 4g. Any ideas?
Click to expand...
Click to collapse
You may have to call your provider, the IMEI number that the phone has, may not be in their directory.
I'm on Straight talk, using an "at&t" sim card and it works fine.
Maybe the at&t store might have a number that will work.

So strange? Any screenshots?

AT & T - 4G - Mate 8
brian85 said:
I can't connect to or load anything, even though the status bar says I'm on 4g. Any ideas?
Click to expand...
Click to collapse
a) Please check the APN settings - screenshots attached - it should be exactly as shown in the picture.
b) Go to settings - mobile data - networked apps - see if the app you are trying to use is checked in that list.
if both these options fail, check with ATT if they have same IMEI as the one you are using. If all these options are exactly like it should be, then you can try getting your sim card replaced and see if that makes difference.
I am using ATT too & experiencing battery drain when the phone is idle especially in doze. This started from this January ever since 2g services were shutdown. Are you experiencing the same? Any one else have this problem? phone idle drain is like 2% per hour overnight. I tried wipe cache and factory reset but the problem persists.

I found the issue. In the phone settings, I had to click on "more" under the network park and check "use mobile data". For some reason that was not turned on.