Airtel Offer : 1Tk use 1Tk back, Registration and details.

For registration : 
Type StartB and sms to 42222
OR
Recharge BDT 26 exactly.
 
Conditions / Informations:
Eligible for call rate over 30paisa/min
Maximum bonus per day is TK 5.
Instant Cash back will be suspend for this customer.
Bonus can be usable for the call rate above 36paisa/min
Bonus validity is only the days of getting bonus.
Check bonus balance USSD : *778*30# (free)