How to check balance in GP, Banglalink, Airtel, Robi,Teletalk,

How to check balance in GP, Banglalink, Airtel, Robi,Teletalk, 

To check the account balance press Dial:

For GrameenPhone Press *566#

For Banglalink Press *124#

For Airtel Press *778#

For Robi Press *222#

For Teletalk Press *152#