MTNNigeria

Another reason you might not be able to make calls could be if NIN is not sucessfully linked on a line. ~Ighedoise

However, airtime might be one of the reasons you are not able to make calls and send sms. ~Ighedoise

The application to check the details on your line is currently not responding on my system. We might not be able to check the details on your line at the moment. Kindly...

Kindly share with me the error message you received while attempting to make calls and send sms, the details of your account balance is also needed for further advice. ~Ighedoise

Kindly read through the details that had been provided above, and let me know where you need further explanations so that I could go over the information again. ~Ighedoise

Second option is, we will assist you from here when you are able to provide the registration and usage details of your line You will be assisted with the puk if you are able...

To Retrieve the PUK via USSD Self Service, dial *123*7*3# or dial *123# (MTN’s self-service USSD dial) and follow the prompt of inputting ‘7’-Self-Service, then ‘3’-Get your PUK...