hi all firstly apologies if i have posted in the wrong place only just joined. i purchased a galaxy s2 a week ago (supposedly brand new) and for the last 3 days the phone has suddenly shut down even with 37% battery life remaining, if i take out the battery and put it back again it works fine. can anyone shed any light on this as i love the phone and i'm going to have a struggle to get my money back as i bought from e bay ( i know probably a stupid move) the phone came with everything ,protective stickers etc and looks brand new, has anyone had a similar problem ? any help greatly appreciated. cheers