How to check My Phone Number in GP, Banglalink, Airtel, Robi,Teletalk,

How to check My Phone Number in GP, Banglalink, Airtel, Robi,Teletalk, 

To check the Phone Number  press Dial:

For GrameenPhone Press *2#

For Banglalink Press *511#

For Airtel Press *121*6*3#

For Robi Press *140*2*4#

For Teletalk Press *551#