yes be carefull now GT is very strict so he man ban without any explanation...bud pls call cus care they can help...As i feel ur card hadbeed expired...it's not the fault of mobitel.itz happen because of security resons...so pls contact call centre and ask wat to do..they will do the need full.if they ignor it pls ask agent name .. and PM me with Call time and called mobile number call date and agent name..I can help you...