You can Check your TNEB Bill Status Online / Mobile by the following method.

To know your bill status on Web 

GO to TNEB Bill Status and enter Select your Region Code and enter your Consumer Number.

for example 121 5 5 has to be entered as 121 005 5

Check TNEB Bill On Mobile:

As of now there is no SMS support available to Check the Bill Status on mobile.

You can register your mobile number in this Link for get bill details.

TANGEDCO Mobile APP

Recently TNEB has launched a Mobile APP for Bill payment.

You can download the TANGEDCO Mobile App from Google play store.