Try to open this site directly with following setting:

http://m.facebook.com.flyproxy.com

Manual gprs setting for uninor-
Apn-Uninor
Proxy/ip-10.58.10.58
port-8080
home page-wap.uninor.in

if it not work then use below trick working 100% in Handler Software...{AIRTELTRICKZ.MOBIE.IN}
Opmin4.2Labs Handler