Hello everyone i get a serious problem i will try to explain everything ok before i was with 3.1.2 on iphone i jailbreaked with blackra1n then after some days i get no signal it means like no sim (my phone 3gs was factory unlocked) ok then i thinked to restore them okay thruu itunes i restored afcourse with updates so is like 3.1.3 but when i trying to swith on my iphone i get message No sim card installed insert a valid sim with no pin lock to activate iphone...what i must do ? any solutions to fix this ? Thank you