Since I needed this information quite often – I believe many others will need it too. Here is how you may know your own number from various mobile phone operators:
GrameenPhone: *2#
BanglaLink: *511#
Robi: *140*2*4#
Airtel: *121*6*3#
Teletalk: *551#
Citycell: Type MDN & send it to 7678
