goto settings:about device
repeatedly tap on 'build number' until developer options are unlocked
goto settings:developer options and set/verify the following options
1. USB debugging = OFF
2. USB configuration = RNDIS, note that rebooting device will reset this to default MTP......
Also, I always set device to 'airplane mode' to turn off internal radios....
S2 will run perfect!
Really dislike when an Apple fan boy or any other fanboy starts a thread with such a biased and untrue statement. Ok, to say you are having problems but a flat out statement like that as a title is too much.
artheck should go to the site admin to have the title changed.
The S2 has a better display for half the price of the Apple product.