How to check own number in sim

Here is a list of Bangladesh Mobile Company : Teletalk, GrameenPhone, Robi, Citycell, Airtel Airtel: Check my sim Number( Airtel Bangladesh ): *121*6*3# BanglaLink: Check my sim Number ( BanglaLink ) : *511# GrameenPhone: Check my sim Number in Grameenphone: *2# Teletalk: Check my sim Number in Teletalk : In SMS, Type tar and send to 222 (per sms Tk 1.15/-) Robi: Check my sim Number in Robi : *140*2*4#