Hello All
Kindly prefix country code i.e. 91 with your 10 digit phone number and provide password of the Bill payment it should work.
It worked for me
URL : http://mms.relianceinfo.com/mms/do/login
Login ID (for example, 16505551212) : 91xxxxxxxxxx (xxxxxxxxxx=10 digit mobile Number)
Password : Bill Password
Regards
Mehul