Dial `*123#` from your BSNL mobile
Send an SMS with `BAL` to `123`
Use the BSNL Selfcare app
Log in to the BSNL website and check your account balance details
Call BSNL customer care at `1503` or `1800-180-1503` and ask for SMS balance details
Dial `*123#` from your BSNL mobile
Send an SMS with `BAL` to `123`
Use the BSNL Selfcare app
Log in to the BSNL website and check your account balance details
Call BSNL customer care at `1503` or `1800-180-1503` and ask for SMS balance details