Samsung Galaxy S2 — My battery on the Galaxy S2 is draining badly, help!

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Sep 24, 2013 7:27:17 PM via App

I have a galaxy s2 SGH-I777 at&t. And the battery is draining like hell. 10% battery drains out just in an avaerage of 20 mins.. Please help me out its too frustating.

And also please guide me about how to use 3g rather than 4g or 2g in s2. There is no option for selecting NETWORK MODE in settings, though *#*#4636#*#*<mobile information< gives many option, but only gsm only(2g) and 4G works for me.

Country m using this phone in: India

Thanks :)

— modified on Sep 25, 2013 1:17:56 PM by moderator