As my uncle is using Samsung galaxy s3 since 1 year 2 months and they have found many problems in the phones such as sometimes Phone reboots automatically and one of the worst problem is Battery drain faster.And the most worst issue faced by me and many of samsung galaxy s3 users is screen goes black but we can hear the sound of touch.
If thiz problem happens then take your phone and throw it to the dustbin coz in this problem you have to change your display.And new display charge rs 5000 in that huge amount we can buy some other smartphones .And that also in 5000. Rs you will not get orignal display you will get some duplicate display.So with my worst experience I recommend users not to buy Samsung galaxy s3.