Checking MTNL broadband usage has become possible for both prepaid and postpaid users. This customer service, allows the customers to track their monthly download and usage. But for this, the Dolphin or Trump mobile number has to be first registered in their broadband account. Here are the steps that needs to be followed. STEP 1 – To Check MTNL broadband Usage you need to Register your MTNL mobile online at MTNL Mumbai - Broadband Web Self Care using your username and password and then click on the link given there to ‘update your cell number’. If you are a MTNL Triband user, who is currently using mtnl broadband services and have a ‘@a‘ suffix with username, You need to update your profile after registering. STEP 2 – You can Start sending SMS to receive usage updates of your mtnl broadband account. Here is the how to of same. Lets take a small example demo to explain how to send an SMS to check usage , If your username is ’99009900′. Simply type ‘BBUSAGE 99009900‘ and send it to 58708. mtnl Triband users (with ‘@a’ suffix) : With same username just suffix ‘@’ at end of username number. Here is a how to for same. Type ‘BBUSAGE 99009900@a‘ and send it to 58708. Kindly note that the MTNL username mentioned above for sms is just an example for your understanding.