my uncle brought iPhone 12/7S from china.i am from india.i inserted micro-sim its unable to detect sim its showing no service.what may be the problem.i am struggling to sort this problem reply:you can dial *#06# to check if the imei number valid,if not,you can show us the phone some picture and version,we will try to help you. reply:i dialed *06# it shows 355656226562525.how can i know whether its valid or not phone android version:2131167137 model no:i6 device serial no:7gxa14dp0n modem firmware 05.15.68 iccid 8986 0111 6754 0196 0455 reply:ask the seller give support,we not sell this version....