Every SIM card has a PIN code, however there are only 3 valid attempts SIM 3 wrong pins, card gets locked and ask PUK code PUK code is on the smart card. USSD in mobile a simple messaging service between mobile phones and an application server in the network, but data is transferred in real time as a session faster than SMS and interactive service supported by all mobiles. Before using SIM always remember that Phone number must be on customer’s Name, SIM should be active before Ported In, Customer CNIC, Biometric Verification and Once a number is ported in it cannot be ported out before the 60 days. Below are some important mobile SIM codes for all networks in Pakistan.
