The federal government through the Nigerian Communication Commission (NCC) has ordered telecommunication operators in Nigeria to disconnect 9.2 million SIM cards without proper registration.
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In a recent report which was sent by the Nigerian Communication Commission (NCC) to the new Nigeria Minister of Communication Isa Pantami, it was disclosed that there are 9 million, 200 thousand SIM cards in the country that are not properly registered in accordance with the standard procedure.

Now all the four major telecommunication operators in Nigeria have released codes to confirm if your SIM is properly registered or not.C

For MTN users - dial *789*1#
For Airtel users - dial *746#
For 9mobile users - dial 746 or 200
For Glo users - text REG to 746 or 3456

Davash222:
Other networks are using Dial code to check but our Glo is using ‘Text’.

Glo and their ‘I too know’.