Call Block
Call block/Incoming Call Screening Service: 

If you're having trouble with unwanted or prank calls and want to avoid those calls & block them permanently then just dial 1515 from your mobile number and press 8.  

Short Code 1515
Monthly Subscription Tk. 10.00/month

15% VAT, 15% Supplementary Duty & 1% Surcharge applicable on above tariff.