I used to be on o2 on my iphone but didnt want to no longer, so i swapped sims and it wouldnt work so i got it unlocked.now i have this new sim in ive had it for a while now, im thinking of possibly swapping back, will it lock to my o2 sim after so i cant change without paying again? please help
>>> Unlcoked iphone from 02 to vodaphone, can i switch back?