It seems that some users of the newly released Samsung Galaxy S2 are facing the battery drainage issue for no apparent reason from the Android OS (Gingerbread in SG2 case). If this is the case for you as well, then there is nice tip from XDA forum member kohiiou to fix the issue. His suggestion is to hard reset the phone to fix the issue.
Warning: It will delete all data and application so SG2 will boot like a new one.
Note: Rooting, Jailbreaking or customizing your device can be risky, and you may end-up bricking your device! Follow the instructions posted here at your own responsibility as InspiredGeek will not be responsible for any damage to your device.
So, here is the procedure:
1. Make sure phone is root first if you want root, and both SU and BUSYBOX installed
2. Shut down phone
3. Hold on the "UP" and "HOME" key, and press the "POWER" button for 2-3 seconds to turn on the phone (make sure to release the "POWER" key after the phone turns on, but continue holding "UP" and "HOME")
4. Select "wipe data/factory reset" and then "wipe cache partition" to remove both.
5. "Reboot system"
6. Once phone has rebooted, Root stays if properly installed, and phone starts off like new.
7. I have been using the phone since for 7 hours now, and seems better.
As you can see kohiiou has mentioned the root of device in Step 1. If you have not rooted your Samsung Galaxy S2 yet, then you might want to follow our step-by-step guide for that first before following the above procedure to fix the battery drainage issue.
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