[Q] How to take my SGS2 completely to stock ICS

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I upgraded my stock rooted GB SGS2 to ICS with Kies on the 12th. Battery life has been awful compared to what I got on stock GB (15-18 hours with normal use) I'm now losing about 10% an hour just sitting idle. If I use my phone at all it won't last 8 hours before the battery is at about 10%.

I did a factory reset and re rooted two days ago and I made it about about the same amount of time before the battery was almost dead again. Last night, I did a factory reset and flashed T989UVLE1_T989TMBLE1_T989UVLE1_HOME.tar with odin then rooted and still about 8 hours after I took it off the charger it's at 20% and I've barely even touched it today. I do not have any apps or widgets installed that I didn't before on GB. I didn't restore the apps with Titanium Backup, I manually downloaded each one from the Play Store. I've wiped the cache and fixed permissions in an attempt to get S-Voice to stop crashing.

Another problem I have is issues with bluetooth routing calls through my cars bluetooth. When it is paired my notifications skip and sputter when they go off.

To the best of my knowledge when I Odin'd back to stock ICS that wiped everything out but since I had an issue with my old Vibrant having remnants left over when flashing ROMs I'm wondering if this could be a similar issue. I usually flash with CWM and not Odin Is there something I should be doing to completely wipe everything out and go to stock ICS? Most all comments I've seen say battery life is even better than GB. Mine has gone the opposite way. Help?

Download TDJ's superwipe (theres a thread for it in the dev section) and run it, THEN Odin the stock tar file.

Thank you!

I notice it says after doing to the super wipe to stay in recovery and flash the ROM. Should I find a flashable zip of ICS or is it ok to use Odin after?

I flashed the zip and went ahead and went into download mode and odin'd stock ICS. Google is actually restoring my apps this time...it didn't the first three times so, so far so good. Thanks for the help.

10 hours with very little use and battery us at 25%

Sent from my SGH-T989 using XDA

D2H, Question for you... You're rooted, have you tried calibrating your battery yet? The only reason I ask is because I was stock unrooted when I upgraded to ICS and my battery life too sucks BIG TIME. Maybe 5hrs, 6 definately tops. I even tried factory reset (which is questionable), removed the battery, let it drain completely and then pulled the battery again and full charged. Still on pace for 15%+ /hr. with light usage.

When I rooted my Sensation I used a battery calibration app and that improved my battery life by leaps and bounds.

I was thinking of rooting my SGS2 just for this.

No, I've not tried that. I used to do it with my Vibrant and never really saw a big difference. I also saw a post here somewhere on here stating that calibrating the battery was a myth.

I may as well try it though. Otherwise I'm going back to GB as this battery life is unacceptable.

Originally Posted by Dammit2Hell

No, I've not tried that. I used to do it with my Vibrant and never really saw a big difference. I also saw a post here somewhere on here stating that calibrating the battery was a myth.

I may as well try it though. Otherwise I'm going back to GB as this battery life is unacceptable.

D2H, so whats the status?

Myself I finally bit the bullet and rooted (OMG SO SIMPLE compared to HTC). After rooting I downloaded "BatteryCalibration" from google play (Same app used on my Sensation). After a full charge yesterday, I calibrated...to TRY to drain my battery down completely for the next charge I turned on BT and GPS. This all happened around 8pm last night... Well its 5:08pm next day now and my battery (with BT and GPS still on) is only at 68% now and that's after some surfing, video watching, games.

I have to say give this a try before going back to GB.

Come to find out there was a beta release of HD Widgets that downloaded when all of my apps restored. That was the culprit. I'm back to 16 hours of battery life.

Cool! It's going on 10:30 pm here and my bt and gps are still on and I'm at 29%... This includes more Internet browsing, games, phone calls and Txt msgs. No charging since yesterday. I won't be surprised if it's still on tomorrow morning.