The phone should be able to load the settings itself when you recieve the message from Reliance. If the phone is not able to read the settings, it means that you got the wrong settings.
Got these settings from India Broadband forum:
APN - rcomwap
Use proxy Yes...
Proxy server 10.239.221.5
Proxy Port 8080
Homepage - wap.rworld.co.in
*broadbandforum.in/reliance-gsm/40270-reliance-gsm-gprs-settings/