i am from india staying in seoul, southkorea for 2 months , i have bought gs2 used and unlocked version , i have 2 issues please help
1. when i connect it to my laptop with kies in it , it automatically asked for firmware upgrade ... can i do it and will my phone get locked after upgrade and i do not know the unlock codes. what should i do for upgrade
2.i want to use the phone in india and the shopkeeper was very confident it works, i have searched the internet and found india spectrum band gsm 900 and 1800 and umts or 3g -2100 , it is the same in korea i think, please help me.
3. is there anyway to unlock this korean phone ,if i had to do it in india.