Database Users

I9100 in China - Comparison (FW, battery life, carriers, stats, etc.)

Hi there,
I got an SGS2 GT-I9100 recently and I am still trying to tweak it to suit my needs.
I'd like to ask the people living in China about their stats and configuration since it seems many issues are usually location/carrier related.
My biggest problem so far is battery drain. I have noticed that whenever wifi is on, my battery goes down by around 1% every 15 minutes or so with phone in standby. When wifi is off I can lose about 1-2% every hour.
I mean, after seeing lt_ler battery stats even with stock FW, having wifi on (night usage), I think there must be something wrong with my settings or phone.
BetterBatteryStats reports no important wakelocks. CPUSpy reads what it seem to be normal Deep Sleep time.
I think it might have something to do with the wifi router. Mine is the one from China Unicom (中国联通) ZXV10 H108B (v. 2.0.0 BJ).
My phone carrier is China Mobile（中国移动）.
I am using Frankenstein KK5 firmware with Siyah 2.4.2. I will be trying uninstalling different apps and then changing kernel, modem or whatever I can think of if it doesn't work.
I also get a high percentage of "Cell standby" battery use in the stock battery usage monitor, reporting "100% time without signal", although I have signal all the time at 4 bars and have no trouble making or receiving calls/sms. I think this wasn't happening before installing Siyah.
So please, people, share your thoughts, stats, settings and ideas. It'll be much appreciated. Also, if some better Chinese reader than me can find some thread/post somewhere about this on some Chinese website, like gfan, please let me know and I'll try and decipher it myself. I just can't find it...
PS: I'll try to add some screenshots later.

hi bro,
im leaving in Suzhou China area and using china mobile service also.
i dont encountered the problem as u describe above.
im running MIUI galnet ICS version with Siyah 2.5.1GT. baseband XXKI4.
on single charge (using extended 2000mah here), can last me up to 2.5-3 days using my previous roaming malaysian SIM card (no data). refer to picture.
using china mobile simcard, yield nearly similar result. again with data-off.
i dont use any special configuration js default conf from MIUI's rom.
have u tried different ROM?

Thanks, mate. I might give MIUI a try, since it is Chinese after all, I just wanted to stay close to stock for now.
Do you use wifi?

no prob !
yeah did use wifi in hotel. but only ON when wanna use. if not i turn it off.
at night also i turned it off.
yeah, u should give MIUI a shot. pretty nice and neat. since used it dont wanna use standard TW's rom anymore. hehe
but prepare to have few disadvantage as below:
1. degrade camera quality
2. no HDMI out, TV out not sure
3. some kernel might give unsmooth experience when watching 1080p video

I'm afraid the problem here has to do with wifi. Because as I said, when turned off at night I get a reasonable performance. But during the day, when it is on because I need to have mail pushed, the battery fades quickly...

I'm in Beijing and have no issues with battery life on China Mobile. I always keep the device on with data, gps, wifi etc. Most of my usage at the hotel is via wifi and when I'm out is on edge. Can generally get 25-30 hours on a single charge. I'm using stock KK5 with siyah kernel v2.4.2 with KL1 modem.

Should close wifi and background data.U can enable them once per 30 min or an hour.Continuous usage on wifi,especially background data can cause u great battery drainage.
For me,if i close wifi and background data,it only drops 1 or 2 percent an hour,but it drops drastically if they are on.Sometimes 20 percent in one hour.It's just a Galaxy S2 issue.Try to flash different roms and kernels to have better battery life.
I am currently in china using china mobile.

[Q] Scree Awake

Hi guys...m using the Note 4 Model SM-910F....recently I flashed the lollipop firmware using Odin that has been released in Germany....after that m facing some issues...like My Screen is most of the time awake though it is turned off and there ls no data connection...also my WiFi is sometimes on though I use Mobile Data...also from battery stats I can see that Android OS, Cell Standby and Android System is eating out huge chunk of the battery which was not the case on Kitkat...I did a factory reset after flashing the lollipop rom...I also did a factory reset yesterday...but I think due to these my battery life has substantially decreased...can u guys help me out with this????

LG G3 d851 7.1.1 Nougat battery drain issue - looking for Stable ROM

Experts, if thread is wrong placed or duplicated, please remove it.
I have the following situation. Bought in US LG G3 phone for a kid. Phone was stated 855 ( I live in Europe). Once I bricked him trying to revert from 5.0 to 4.4 due to huge bateery drain, it was found that actual MB model is 851 TMO.
The current situation is:
1. Phone bootloader unlocked, rooted, installed 7.1.1 Nougat, Lineage OS 14.1-20170108-UNOFFICIAL-d851 flashed with adb.
Modem is: MPSS/DI.2.0.1c1_13-00009-M89***
2. Recently purchased 4G SIM from virtual provider of Partner
3. Kid complaints on following:
- battery drains to 0 in 2 hours ( new brand battery, manufactured 8 months ago)
No applications installed - GApps pico, Chrome, Root Checker and Waze.
APN be default were set to Partner 3G portal.
I changed APN to fit virtual provider settings:
- slow surfing - I took the phone today and it indeed switches all the time between 3G and H. Talked to provider, looks like they sent me wrong SIM ( 3G flashed ).
I also see in battery usage - Mobile Strength signal - a lot of yellow lines inside green.
Network signal is HSDPA @ 7.2 Mbps
I made cross SIM test - took the SIM from a friend ( different provider and tested it with my phone) - H+ all time and Network signal is HSDPA @ 42.2 Mbps
My "blaming finger" is SIM, but Im not sure this is the main issue for battery drain.
So, I expected to get a new SIM from provider and will test it.
Q1: Am I suspicions or it can be SIM issue?
Q2: I need battery good life ROM. I'm new to LG ( mine is A0001), so I'm not sure either stay with original TMO ROM, go to AICP or else ( preferable Nougat, otherwise MM or Lollipop much better)? The most usage is surfing, WhatsApp, etc
Q3: How to set LTE correct settings? the "4636" code gives me only testing mode?
Any help will be appreciated.

Unstable signal drain your battery, just check the battery life without the sim.
I have the battery problem everytime i flash an AOSP; if i have full 100% battery and reboot the phone i got 4%-10% battery and the phone shoutdown cause no battery after a minute.
Btw try to calibrate the battery Apk

haget83 said:
Unstable signal drain your battery, just check the battery life without the sim.
I have the battery problem everytime i flash an AOSP; if i have full 100% battery and reboot the phone i got 4%-10% battery and the phone shoutdown cause no battery after a minute.
Btw try to calibrate the battery
Click to expand...
Click to collapse
Thanks mate, planned to do so. I remember that it was like 1 day standby with 4-5% battery lost only when no SIM was in there. will try again overnight.
Basically you say - go with Stock ROM? I'm a little scare since i can potentially loose ability to surf at all.
Tried wife SIM in there and no stable stable as well, when this SIM works well at her OnePlus. Still the result was better. Possible I have to clean all APN and stuff ( cache, so so so) before letting new SIM in.
or those are both bad SIM + bad ROM...

Terrible battery life using unlock G930U rom

Hi,
anyone here using the 930U firmware ,
i get only about 2-2,5 SOT.
Is it the problem with the U firmware,
Or nougat itself,
Thank you.
Edit: My battery drop 35% in six hours standby last night T.T.

I have the same issue. Not sure what causing the drain. I moved to hybrid rom by jkruse . That helps keeping the battery life good. https://forum.xda-developers.com/att-galaxy-s7/development/rom-t3637664

i have the verizon variant and i have the same issue, i'm returning to stock verizon rom

Same problem here, it started about 2 months ago. I have noticed that it doesnt happen when airplane mode is activated and only wifi is on, maybe radio is causing the problem (?). I'm going to try the hybrid rom mentioned before

Could someone solve the problem? I have the last update and the battery is drained and turned off with 40%

That's odd. I've been using the G930U on my G930A for some time now and I haven't had any problems with the battery life. Then again, I only have Wi-Fi on my S7, so maybe it is a radio issue?

I do not know, sometimes it goes off with 40% others with 19% and so it varies but never reaches 1% and it will be 2-3 hours of screen use that the battery lasts. I changed the battery but it remains the same

S8 Battery Drainage After Update !!

Hi everyone, I have S8 with the following configurations.
- Model Number: Sm-G950FD
- Android Version: 8.0.0
- Baseband Version: G950FXXU2CRF1
The battery drainage since the last 2 updates is absurd!.
I leave the phone on while sleeping (no wifi, mobile data or AOD) & it can lose up to 40%.
A 100% battery can make me go a few hours before it hits Zero if I'm using my phone.
I dont think this is normal at all.
P.S. I tried the following solutions with no use.
- Disable Chrome
- Format cache partition
- Factory Reset

I've noticed the same unfortunately.

Yes after june security update battery life is worst.. within 9 to 10 hours battery drains completely

I got july security update. Lets see if it helps to do it.

No clue how you all have those Problems. Im 25 hrs in and have 59% left... 2 hrs of SOT so far but 4 hrs of BT Streaming Podcasts, which drains too.
If I wanted I can do 3-4 days without charging, which is the best I had on any smartphone to date...