Transfer balance Airtel to Robi Describe here. Airtel and Robi are marge and get one company. We get awesome support from Robi Customer care and airtel. Transfer balance follows this step:
BTR Space XXXX (your PIN Code) Space 018XXXXXX(Receiver Phone Number) Space 50(Balance Amount this) and SEND 1000
Or you can just Dial *1212#
And Balance Transfer Charge 2.55 Taka.