Go to the Multimedia Media Message & Connections settings and input following information:
Connection Name : Airtel MMS
Data Bearer : GPRS
Access Point Name (APN) : mms
Access Point Alias (for some handset) : Airtel MMS
Proxy address : 10.128.5.6
URL : http://bd.airtel.com/
Connection Security : Non-secure
Tags:
Manual Internet Settings