Related
hi. I just found out that cellular radio is taking up most of my battery on the NST. its strange, considering the fact that nook does not have telephoning capabilities. I went a bit deeper and found out that a process named DemoModeService is present, as all as WaveFormDownloaderService and DeviceManagerService, all of which are bn services. I wonder if they have a role in battery drainage and if anything will happen if I stop them.
I would start with switching nook completely off and on again. Solved all my battery drain issues in the past.
cceerrtt said:
I would start with switching nook completely off and on again. Solved all my battery drain issues in the past.
Click to expand...
Click to collapse
Is yours unregistered as well?
Increased battery drain on unregistered devices is a known issue and most likely caused by B&N services that, in lack of a better description, "wont settle down" due to the device not being registered and logged on to B&N
Stopping those services might be worth a try, and I doubt doing so will cause any major problems.
I'm not sure what causes the battery drain, but i'm betting it has to do with the Google apps.
I rooted my nook with both the methods listed here and my battery life was awful.
I restored to stock manual rooted with out adding any Google apps just manually installed what i wanted and my battery life is awesome.
The other methods might be easier but they install way too much junk that causes battery life issue.
persichini said:
I'm not sure what causes the battery drain, but i'm betting it has to do with the Google apps.
I rooted my nook with both the methods listed here and my battery life was awful.
I restored to stock manual rooted with out adding any Google apps just manually installed what i wanted and my battery life is awesome.
The other methods might be easier but they install way too much junk that causes battery life issue.
Click to expand...
Click to collapse
You're off topic
This is a topic about increased battery drain on devices that are not registered with B&N. (i.o.w., the user skipped the registration process)
I don't think gapps have to do with anything. they do get automatically installed even when the device is registered and rooted they don't cause any major problems then. they do take up a lot of battery , but its not as much as unregistered and rooted NSTs. I am sure this has to do with those bn services.
I don't want to reroot it and go through all that nonsense again. just tell me if stopping those useless services would cause any problems, and if anyone has tried it. I am not too enterprising, and would be glad if some ambitious developer did it first.
ros87 said:
You're off topic
This is a topic about increased battery drain on devices that are not registered with B&N. (i.o.w., the user skipped the registration process)
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Click to collapse
by the way, thanks @ros87 for your help the other day. I reached the technical team and the only thing they'd say was to use their bloody chat room that's always offline in my time zone, or to call them on their international number. they are not very helpful. so, I just bypassed the registeration.
ros87 said:
You're off topic
This is a topic about increased battery drain on devices that are not registered with B&N. (i.o.w., the user skipped the registration process)
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Click to collapse
Actually, is there a way to find out which app drains CPU?
Same Q I asked already: how to convince ps to display cumulated CPU time
ros87 said:
Is yours unregistered as well?
Increased battery drain on unregistered devices is a known issue and most likely caused by B&N services that, in lack of a better description, "wont settle down" due to the device not being registered and logged on to B&N
Stopping those services might be worth a try, and I doubt doing so will cause any major problems.
Click to expand...
Click to collapse
How do you stop the B&N services?
I uninstall system apk
Phone.apk & TelephonyProvider.apk
and after that my nst works fine
look at http://forum.xda-developers.com/showthread.php?t=887957
Thanks for that latuk. I think I'm one step ahead of myself here. Presumably in order to do these things the NST needs to be rooted. I now need to investigate how to root the NST.
My wife and I have each got an NST Glow. I operated them both unregistered. We both experienced battery drain of about 6% overnight (10 hours) in screen saver mode. I was about to embark on the rooting/apk removal solution as discussed above.
Before I started that process I thought I might as well try registering one of the NSTG's as a test. The result was conclusive.
Again overnight in screen saver mode the unregistered NSTG experienced 6% battery drain, the registered NSTG experienced zero battery drain.
I can only conclude that B&N have got built in processes that use a great deal of battery power if the nook is unregistered.
So it appears to me that for simpletons like myself the easy answer is to register. They simply require your email address and name, no credit card details. So registering isn't so bad.
Unfortunately, the time has come where B&N have taken their e-store and their registration servers offline. Even if your device isn't rooted, rom'd or otherwise customised, it is now an absolute necessity to know how to bypass the registration screen, the Out Of Box Experience*.
1. Turn on your NOOK.
2. At the welcome screen hold down the button on the top right (page turn button) and at the same time slide your finger across the top of the screen from left to right.
3. You should now see a Factory link on the top left of the screen, press this link.
4. On the factory screen hold down the same button (top right) and at the same time tap the bottom right of the screen.
5. You should now see a Skip Oobe link on the bottom right, press this link.
So it is still really a good idea to know how to work around the battery drain, as it is still an issue with this custom ROM I'm presently using, retired in 2015 [NST/NSTG][ROM] Tweaked Modded ROM Final
With Superuser installed, I used this ROM's Clean Master app to remove
com.adome.air.apk
com.benhirashima.nookcolorsettings.apk
com.android.email.apk
com.bndeviceregistrator.apk
com.bn.nook.affiledownloadservice.apk
com.bn.nook.cloud.service.apk
com.bn.nook.community.apk
com.bn.nook.shop.apk
Will report back if battery drain fixed.
This is the second time I tried to fix battery drain on a custom ROM, last time was using the 1337 ROM that came out in 2014. It was preloaded with too many utilities imho and I removed too many apks that I broke the dictionary app while fixing the battery drain.
*Uech! Out of Box. Experience. Remember when an experience was something worthwhile, like the first time you heard The Jimi Hendrix Experience or how much practice you've had in your profession.
Anne-d'Royd said:
Unfortunately, the time has come where B&N have taken their e-store and their registration servers offline. Even if your device isn't rooted, rom'd or otherwise customised, it is now an absolute necessity to know how to bypass the registration screen, the Out Of Box Experience*.
Click to expand...
Click to collapse
Maybe. If you update the firmware to 1.2.2 everything will work as before--assuming you have a US ROM. If not, you can change ROMs to a US version and then update the firmware. Either way, you don't need to skip oobe unless you want to for some reason.
I tried it recently on a second NST I got to experiment with. I thought I was doing really well, just keeping enough to allow the Reader/Library/Dictionary to function. Then I had occasion to look at a logcat to track down a problem. There was an endless string of system wails over this and that which could not be found or not be contacted. I could hardly find what I was actually looking for. In the end I decided it was better to update to 1.2.2, register, and just ignore the B&N stuff (except for the Reader/Library/Dictionary)--oh, all except for the NookCommunity app. That I did disable because it constantly nags you in the notification area.
OK, now having said that, I am still using my original NST which is running FW 1.2.1 (and is rooted and much modified). I've had no issues with it despite the dire warnings from B&N about June 29, although I did turn off the automatic update a few weeks before because attempts to update OTA were causing reboots.
But I've never bought any books from them, so I've not done anything that needs intentional connection to their servers since the change.
Hi, I live in the UK and I recently bought a Nook ST for cheap on eBay, planning to use it bypassing the registration. Little did I know about the battery drain and processes of the stock unregistered ROM. Mine runs under 1.2.1 I firmly believe UK version as I tried to reset and register but only got errors, forcing me to use the bypass sequence of buttons. Obviously I didn't even register any WiFi spot and the module is always off.
Based on your experiences, what is the best way and quickest to solve this battery drain? I'd use the Nook just as a e-reader, so I'm not interested about added functionality - if anything I'd like it as simple and little distracting as possible.
Is the US firmware a good fix for the problem? I wouldn't mind using stock US firmware as long as you confirm it still lets you register... Do you need root? Is there any particular procedure to switch to a different firmware? Is the ROM available on the internet?
If that doesn't even require rooting, I'd probably go for it... Otherwise what are the best things to do to fix the issue in a rooted UK device?
EmaTheMirror said:
Based on your experiences, what is the best way and quickest to solve this battery drain? I'd use the Nook just as a e-reader, so I'm not interested about added functionality - if anything I'd like it as simple and little distracting as possible.
Is the US firmware a good fix for the problem? I wouldn't mind using stock US firmware as long as you confirm it still lets you register... Do you need root? Is there any particular procedure to switch to a different firmware? Is the ROM available on the internet?
If that doesn't even require rooting, I'd probably go for it... Otherwise what are the best things to do to fix the issue in a rooted UK device?
Click to expand...
Click to collapse
You can reset the device to factory and then flash the US firmware. This will allow you to register and avoid the power drain issue which, to my knowledge, has never been fully resolved. Actually, you probably don't even need to reset the device, just flash the US firmware. That will put you at 1.2.1. (US firmware flash: https://sites.google.com/site/xcdguides/nook/nookregion)
As you may know, there is a new firmware, version 1.2.2 which incorporates updated TLS standards--but only for B&N transactions. However, even if you don't transact any business with B&N, a registered device will be constantly nagged until it is updated, and rooting will disable updating, but not the nagging. For that reason I recommend that after you flash the US firmware (but before rooting) you do the 1.2.2 update manually and get it over with. (update download and instructions: https://help.barnesandnoble.com/app...tware-updates-for-tls-1.2-compliance#ManualDL scroll waaaaay down.....)
If you want to root the device after updating, I recommend Nook Manager, but you need to make a minor change to the files on the SD card before you use it with 1.2.2. This is described here: https://forum.xda-developers.com/nook-touch/general/nst-nstg-fw-1-2-2-update-t3785566
Hi, thanks for the reply, I solved the solved the problem changing the firmware to US following this simple guide:
https://sites.google.com/site/xcdguides/nook/nookregion
Then updated to the latest firmware manually, which solves the connectivity issues among others, with these official instructions:
https://help.barnesandnoble.com/app...evice-software-updates-for-tls-1.2-compliance
Otherwise it wouldn't even connect. I didn't know at first and registered a new account via browser, signing in from nook later - then it connected just to register the device, don't ask me why - but it's always best to have the firmware up to date anyways.
The battery seems now fine, so far.
Just for the lulz, I tried to link a card to the shop but can only have US addresses for billing... Lol, eBook DRMs have always amazed me. Luckily, you can easily download Google Play purchases and sideload them (among others) via Calibre.
Thanks anyway, hopefully this post will be useful for future reference.
Hi there,
Been around for a while and rooted some devices over the past few years. Just tried rooting my company S5, as it is terribly slow and I wanted to shut down some bloatware; not even starting custom roms.
I did everything according to the rules, phone boots, but then... BLACK screen and no progress!
It seems to happen due to the fact that my phone's internal memory is 'coded' (compny security policy) I get to the level where I have to fill out my code/password, but after that - BAM - black screen and no progress. Next to the fact that I need my company phone to work, there is also some data there which I need. Didn't do a extra backup as I use MEGA as a backup. Just found out that this didn't sync for a while, leaving me with too big a gap to even reset it just like that unfortunately.
Hope you can help and shed your light on this with your knowledge. I have a SMG900F and I used Odin v3.09. Thank you very much in advance!
For those of us that were dumb enough to take the NK1 OTA without researching, damning us to an eternity without root, could we potentially worsen the possibility that a root exploit be found by taking the Lollipop OTA as well?
I'd say that if you took the 4.4.4. Update go ahead and upgrade to Lollipop because the chances of someone finding a exploit for 4.4.4 now is slim to none, because if a developer does still have this phone they're gonna be working on Lollipop.
ChevyNexus said:
I'd say that if you took the 4.4.4. Update go ahead and upgrade to Lollipop because the chances of someone finding a exploit for 4.4.4 now is slim to none, because if a developer does still have this phone they're gonna be working on Lollipop.
Click to expand...
Click to collapse
+1
OneClickRoot
Okay, doing some research... I am not going to try and update my Note 3 to Lollipop and damn myself to a pit of rootless use... Would someone please test the theory that OneClickRoot will work for rooting the Verizon Galaxy Note 3 as they claim to be able to do Here.
Just curious... what about being unrooted makes a phone useless? I am just wondering.. i always root mine but thinking bout it, i don't really use anything that HAS to have root?
Icetech3 said:
Just curious... what about being unrooted makes a phone useless? I am just wondering.. i always root mine but thinking bout it, i don't really use anything that HAS to have root?
Click to expand...
Click to collapse
It all depends on what you're trying to do with your phone. It's never going to make it "useless" as a phone. If you have a specific functionality that you're trying to accomplish that requires root and plan to use it all the time, then perhaps the phone could become somewhat useless to you.
To most people it tends to mean that they aren't going to be able to use their native tethering app without having to use some third party software like FoxFi. Rooting your phone means nothing more than giving it's user the ability to grant root (administrative god) privileges to the device. Click happy people will grant root access to anything that asks for it, therefore making it a security disaster to be left available by default. The advanced user can not only be more cautious as to granting root permission, but also maintain what is and is not allowed root at any given time. If done well a user can even maintain a more secure device with root by having access to everything.
Personally I have several different applications and functionalities that require root that I wasn't trying to use when I mistakenly took the 4.4.4 OTA update. They are permanently lost to me as long as I own this device now until a new exploit is found. However, the phone is still not at all useless. It works great as a phone, text messaging device, internet browser, camera, etc... I just miss the availability of control that I no longer have after losing the option to root.
Fwiw, I actually recommend not rooting your device unless you have specific reasoning for it and intend to be extremely cautious granting root access.
Also, if anyone wonders, I did go ahead and take the Lollipop OTA. It performs amazingly and is very aesthetically pleasing!
JeSsEiCp said:
It all depends on what you're trying to do with your phone. It's never going to make it "useless" as a phone. If you have a specific functionality that you're trying to accomplish that requires root and plan to use it all the time, then perhaps the phone could become somewhat useless to you.
To most people it tends to mean that they aren't going to be able to use their native tethering app without having to use some third party software like FoxFi. Rooting your phone means nothing more than giving it's user the ability to grant root (administrative god) privileges to the device. Click happy people will grant root access to anything that asks for it, therefore making it a security disaster to be left available by default. The advanced user can not only be more cautious as to granting root permission, but also maintain what is and is not allowed root at any given time. If done well a user can even maintain a more secure device with root by having access to everything.
Personally I have several different applications and functionalities that require root that I wasn't trying to use when I mistakenly took the 4.4.4 OTA update. They are permanently lost to me as long as I own this device now until a new exploit is found. However, the phone is still not at all useless. It works great as a phone, text messaging device, internet browser, camera, etc... I just miss the availability of control that I no longer have after losing the option to root.
Fwiw, I actually recommend not rooting your device unless you have specific reasoning for it and intend to be extremely cautious granting root access.
Also, if anyone wonders, I did go ahead and take the Lollipop OTA. It performs amazingly and is very aesthetically pleasing!
Click to expand...
Click to collapse
Very well stated. I agree with you about the uses of rooting as well as how the OTA 5.0 is performing. If you're already unrootable on 4.4.4, then you might as well upgrade to 5.0.
Icetech3 said:
Just curious... what about being unrooted makes a phone useless? I am just wondering.. i always root mine but thinking bout it, i don't really use anything that HAS to have root?
Click to expand...
Click to collapse
It unlocks an array of possiblities that would not normally be alloud llike clean up bloatware, runing certain apps that you dont have permission to, tweaking your phone for performance, fixing bugs that were missed in recent update, xposed function for example, installing different roms, customizing the look and feel of your phone, hacking, development, security testing, just to name a few which start with root and if you have a unlocked bootloader endless possiblities especially on divice like this.
JeSsEiCp said:
It all depends on what you're trying to do with your phone. It's never going to make it "useless" as a phone. If you have a specific functionality that you're trying to accomplish that requires root and plan to use it all the time, then perhaps the phone could become somewhat useless to you.
To most people it tends to mean that they aren't going to be able to use their native tethering app without having to use some third party software like FoxFi. Rooting your phone means nothing more than giving it's user the ability to grant root (administrative god) privileges to the device. Click happy people will grant root access to anything that asks for it, therefore making it a security disaster to be left available by default. The advanced user can not only be more cautious as to granting root permission, but also maintain what is and is not allowed root at any given time. If done well a user can even maintain a more secure device with root by having access to everything.
Personally I have several different applications and functionalities that require root that I wasn't trying to use when I mistakenly took the 4.4.4 OTA update. They are permanently lost to me as long as I own this device now until a new exploit is found. However, the phone is still not at all useless. It works great as a phone, text messaging device, internet browser, camera, etc... I just miss the availability of control that I no longer have after losing the option to root.
Fwiw, I actually recommend not rooting your device unless you have specific reasoning for it and intend to be extremely cautious granting root access.
Also, if anyone wonders, I did go ahead and take the Lollipop OTA. It performs amazingly and is very aesthetically pleasing!
Click to expand...
Click to collapse
Is there any change in the strength of the signal. When i first got the device i had service everywhere along the way like many other people on here i be having issues with connection any improvement in the latest update or is it just more bloatware and beefed up security.
Sammguy said:
Is there any change in the strength of the signal. When i first got the device i had service everywhere along the way like many other people on here i be having issues with connection any improvement in the latest update or is it just more bloatware and beefed up security.
Click to expand...
Click to collapse
I've been keeping an eye on my signal strength over the past few days. While I still have stable connectivity mostly everywhere I go, I have noticed a minor loss in signal strength. At home, my signal strength has dropped 1.5 bars on average as well as having a more difficult holding 4G (will switch to stronger 3G) in locations where 4G strength struggles.
I also noticed it switch to 3G once at my home and then switch back to 4G on it's own after 5-10 minutes and I live 1/4 mile from a cell site where I usually maintained "all bars" before Lollipop.
I haven't suffered any usage issues or bandwidth losses from this yet, but I figured I would answer your question and chime in that I have notice a minor overall signal strength loss.
Thanks dor your reply.
Forgive me, I've been out of this community for a while, so I'm a bit out of touch. I have an SM-G930A (AT&T S7) running the EngBoot (PH1 -- thanks princecomsy and ChainFire!) and I installed the v15 fixes. I have a grandfathered unlimited plan. I don't do much with root aside from pretty much enabling the tethering option and killing off some bloatware. My main two complaints with this setup are that the phone randomly gets hot and/or sluggish and my battery life is VERY sporadic from day to day. Some days I can go all day and have 80% left, then some days I can't make it through lunch without it being down to 30%. There's no difference in usage between the two days.
Is there a firmware available that would allow me to tether still (root or not, doesn't matter), that isn't a complete suck on the battery and enables Android Pay? I wouldn't mind being able to continue using Titanium (root), but, I could live without it if I get tether and Android Pay.
I have backups and yadda yadda, so I'm ready to do this, I just see a lot of mixed messages in the different threads and am hesitating moving forward...
Thanks!
harmgsn said:
Forgive me, I've been out of this community for a while, so I'm a bit out of touch. I have an SM-G930A (AT&T S7) running the EngBoot (PH1 -- thanks princecomsy and ChainFire!) and I installed the v15 fixes. I have a grandfathered unlimited plan. I don't do much with root aside from pretty much enabling the tethering option and killing off some bloatware. My main two complaints with this setup are that the phone randomly gets hot and/or sluggish and my battery life is VERY sporadic from day to day. Some days I can go all day and have 80% left, then some days I can't make it through lunch without it being down to 30%. There's no difference in usage between the two days.
Is there a firmware available that would allow me to tether still (root or not, doesn't matter), that isn't a complete suck on the battery and enables Android Pay? I wouldn't mind being able to continue using Titanium (root), but, I could live without it if I get tether and Android Pay.
I have backups and yadda yadda, so I'm ready to do this, I just see a lot of mixed messages in the different threads and am hesitating moving forward...
Thanks!
Click to expand...
Click to collapse
From what i understand is that if your rooted, android pay or Samsung pay will not work. The phone is sluggish and gets hot do to the engineering kernel even with the V15 fixes. The only way around it that I've found is to flash the Stang5.0litre rom from the Verizon thread (including his fixes in the OP that are strictly for his rom, don't use the v15 fixes.zip if you flash his rom as it'll mess you up). You'll just have to use WiFi to setup the phone afterwards enter in your APN and use titanium to freeze "setup wizard" to get rid of the "this is not a Verizon sim" message. As far as teathering, you can update to the latest AT&T firmware (APK1) and still root the phone and use xposed for the teather bypass. However, if you update and root then install the Stang5.0litre rom, teather bypass is activated by default on his rom i believe.
Well, let me approach/ask this a different way... if I use the engineering kernel/root is there a way I can modify the phone to enable tether then go back to the standard kernel/image? It's painful to deal with the sluggishness and heating up. It takes way too long just to unlock the phone. The *ONLY* thing I use root for is tethering right now, that's it.
Again, thanks for the responses! I sincerely appreciate it!
harmgsn said:
Well, let me approach/ask this a different way... if I use the engineering kernel/root is there a way I can modify the phone to enable tether then go back to the standard kernel/image? It's painful to deal with the sluggishness and heating up. It takes way too long just to unlock the phone. The *ONLY* thing I use root for is tethering right now, that's it.
Again, thanks for the responses! I sincerely appreciate it!
Click to expand...
Click to collapse
I don't know if you can or not. I have a teather plan so I'm not sure what would need to be changed.
harmgsn said:
Well, let me approach/ask this a different way... if I use the engineering kernel/root is there a way I can modify the phone to enable tether then go back to the standard kernel/image? It's painful to deal with the sluggishness and heating up. It takes way too long just to unlock the phone. The *ONLY* thing I use root for is tethering right now, that's it.
Click to expand...
Click to collapse
Unfortunately you can only have root on the phone if you are running the engboot kernel, and you can't go back to full stock and keep your data/settings. KNOX, SELinux, and dm-verity lock things down so much on Samsung devices, it's incredibly difficult to get root by more traditional means. Because the engboot kernel is actually from Samsung (leaked), it's allowed to be installed on the device. If you try to patch with anything non-standard, you run the risk of tripping the KNOX flag and crippling the phone.
I have my AT&T V20 since launch. When is working fine, I love it. BUT, at times it gets hot and slow with no apparent reason. If it was slower, it would be considered frozen (as in not respoding at all). When it does that I hate the phone and I want to make it a 1000 pieces.
I tried new battery, factory reset, removing apps and the thermal paste mod which gave a temporary improvement. I also stopped using the sd card in suspicion that had something to do with it.
Now, I am just patient until the Pixel 4 comes out which looks to be one of my top up coming alternatives. Definitely my next phone will not be LG. My previous phone was the Nexus 5 and I am moving on from LG. I am hoping to get a phone that is not carrier branded and has vowifi and volte on AT&T.
In the meantime, any tips for things I can do or apps that can help will be appreciated.
Sent from my LG-H910 using Tapatalk
Hi I came on here today to start my own thread about my issue but your problem seems to be similar so I'll join in here If you don't mind.
I have a vs995 but I'm using H910 (at&t) firmware so I could have FM radio. Everything was going great really great untill I finally started using it was my daily driver.
So yes my device is certainty getting hot and suddenly cold like your device. I listen to a lot of online radio or music and I noticed my device is so hot I could feel the heat from it in my pocket which is just a no go. I get rapid battery drain as well not surprisingly when you feel heat.
My device is a new refurb. I did the cpu throttling test and I got very good results, hardly any red, so I decided not to do the thermal mod and won't do it untill I fix this problem. I did change the thermal-config file which I need to revert to stock to see if that is causing it but I don't thing it is.
I have frozen a lot of AT&T apps using Titanium backup. I had installed Greenify, Naptime and Servicely but I've now disabled those for the moment while I have this problem.
I used an app called SystemPanal2 which shows and monitors running processes with battery drain. It a bit of a complex app and didn't really learn anything from it. One thing though is that the app had a high battery drain for "Unknown Processes" so I don't know what that could be, it might be the cause of the problem. I get high ratings for the expected things like Display, Android System, SystemUI and something called "Call Services".
One thing I did is put my sim into another fone and set up a hopspot for my V20. Using the V20 for streaming apps on wifi the phone did not get anywhere near as hot for the short time I did this.
I suspect a few things. It could be something to do with the AT&T bloat apps specifically related to Call Management. It could be that flashing H910 on my VS995 comes with negative side effects that I can't fix. It could be a problem with the custom kernel I flashed which was working almost as fluid and Lineage 16 when I tested that.
I don't think it's the battery. I have a perfine 4100 on the way but I think it's software. If I can't resolve this soon I'm going to have to reflash original VS995 firmware and start again from scratch which I really don't want to do, but it's not in a state I can use as a daily driver as it is.
One last thing, in troubleshooting this issue I went into Hidden Menu *#lgmenu#*910#. Field_Test>Modem_Settings>....most of the options you'd expect to find there are missing including select bands etc. Can someone tell me if this is normal for the H910? I'm concerned I may have debloated some at&t stuff that caused this.
@Eezony feel free to join. Mine is not rooted, stock H910 with the latest update. Since I am not rooted, I have even less access to the running processes.
Now you mentioned it, the phone tends to behave more normal when I am traveling overseas using another device as a hotspot to the V20 and the V20 on airplane mode (and using WiFi Calling and other apps).
In the modem settings I have Engineering Mode and PDP setting.
Thanks @haris163. As I said I'm highly suspect the issue has something to do with AT&T specific settings/bloatware/services etc. In which case it would affect my rooted and your non-rooted device in the same way.
Now since I posted I disabled some further background at&t process (physically deleted the apk's in system/priv-app ) that I had disabled but were showing up as a running idle process strangely. I'm running my fone beside me at home with earbuds plugged with streaming music app on and so far the device is not hot in the same way it was in my pocket. Hopefully I've found something but too early to tell. One of the process was called something like at&t_remote_service.
Well, I have since reverted back to US996 by flashing KDZ.
As I was saying the reason I flashed H910 at&t on my device was for the FM radio capability. Unfortunately the at&t version introduced some hoops to go through to get wifi and signal working properly which I didn't fully remedy. All these issue were resolved by reverting to US996 which is carrier bloatware and modifications free.
But that one has no fm radio so I ported the fm radio app to the US996.
The result is now I'm fully satisfied with my software setup without troubling issues.
You don't have to be rooted to flash US996, just use lgup patched version.