To upgrade from your existing 2G to 3G services, write 3G and send to 666. The upgradation fee is Free and respective 3G package will be activated and notified through SMS.
3G -> 666
Ekush , Agami
Any 2G or 3G
Note: For example, if Bijoy 2G package subscribers want to upgrade from 2G to 3G, write 3G and send to 666 and Bijoy 3G will be activated.
How to downgrade 3G to 2G Service?
To downgrade from 3G to 2G, write 2G and send to 666 and respective package will be activated.
To migrate to Bijoy 2G/3G package, write bij, for Ekush 2G/3G package, write 21, for Shadheen 2G/3G package, write sha and send to 555.