When you buy a new BSNL prepaid SIM card and activated it, By default International Calling (ISD call) and Internet Data will be in deactivated status.
To activate International call in BSNL prepaid SIM, send an SMS ACT ISD to 53733 from your BSNL mobile number
Immediately you will receive an SMS that your ISD facility request is received. Wait for confirmation.
Once you receive confirmation sms regarding Activation of ISD from BSNL, then try to call any ISD number with appropriate ISD code.
For example, if you want to call USA, start with +1 , or 01.
If you want to deactivate ISD calling, then send an SMS DEACT ISD to 53733
To activate International call in BSNL prepaid SIM, send an SMS ACT ISD to 53733 from your BSNL mobile number
Immediately you will receive an SMS that your ISD facility request is received. Wait for confirmation.
Once you receive confirmation sms regarding Activation of ISD from BSNL, then try to call any ISD number with appropriate ISD code.
For example, if you want to call USA, start with +1 , or 01.
If you want to deactivate ISD calling, then send an SMS DEACT ISD to 53733