Hi guys i have iphone 2g which is jailbreaked and unlocked.Actually i have very strange problem with my sim card.When i insert simcard in iphone with iphone poweroff but when i power on iphone with simcard inserted it donot boot it just show some white and black colour screen blinking.But when I power on iphone without simcard inserted it boot up normally.I have tried putting iphone in DFU mode many times but no luck.Can you please tell me what is the problem.