[headhair]

Please try manual settings.

Browse for file
hiddenmenu.exe
(Hidden file)
\windows\ folder.
Run that file

You will be prompted to enter spc.
Enter 000000 (six Zeros)

Select Service prg
Change
MDN=<Your Reliance Mobile Number-10 digits>
MIN=<Your Reliance Mobile Number-10 digits>
HomeSID=14655

Select more
change
Mcc=404

CDMA homeSid/Nid as below
index=0
sid=14655
Nid=65535

Save. Phone itself will restart. Wait

After restarting try your registration. & reply.

Actually I didnot have this type of hurdles.