In order to start using MobiFlexi you need to do the following
STEP 1
Send the SMS message SUBM or SUBL to 54626(MTNL Delhi),SUBE,SUBPC,SUBP to 54626 (MTNL Mumbai).
STEP 2
Delhi MTNL Users Visit the Delhi MTNL portal, Mumbai MTNL Users Visit the Mumbai MTNL portal and then click on new user link
Create a user loginid for using the service or You may also create userid by
sending a message like 'User userid licenskey' e.g User ramesh MF-IN-12345555555 to 54626
This is a one time step. After you have created a userid for yourself you would not be required to do this step.
STEP 4 (Only For Music, Photo Printing and Phone Backup)
Send message “install” to 54626 to install the service on the Cell Phone. You may install directly also from the URL (for Delhi Users)
http://cell.MobiFlexi.com/mtnld, (for Mumbai Users)
http://mum.MobiFlexi.com/mtnld from your Cell Phone This step is mandatory to use Music or Phone Backup & Retrieval options of the service on your Cell Phone.