how can i unlock my samsung s400i so i can use any sim for free?

Answer 1

you can have your mobile unlocked to take any sim card,you can take it down the high road cost about £10. to £15.the phone will then exsept most sim cards,but you still have to have a active sim card wether time plan,or pay as you go,

Answer 2

take it to a phone unlocking shop, generally the little phone companys do it

Answer 3

most areas have phones shops where they will do this. my local market has a stall where they do this for £10.