Do you want to check balance of MTNL Delhi sim card then you are on right place. MTNL(Mahanagar Telephone Nigam Limited) is a telecommunication company providing service in Mumbai and New Delhi metro cities of India.
Following are USSD(Unstructured Supplementary Service Data) code and IVR(Interactive Voice Response) for MTNL mumbai and delhi, to check account balance.
MTNL account balance Check :
USSD code: *444#
IVR code: 444
If you are in home/roaming network then, you can just dial 9869556677 to know the balance and validity.
*445# to know plan voucher expiry and
*446# to know free promotions balance and expiry.