I want my sim to be block, but I'm not in Nigeria now, my sim got missing and someone is using to be withdrawing money from my bank account, 08030944373
So sorry about your lost sim. This happened to me about 2 weeks ago, and below is the message from MTN Customer Care when I contacted them. They will also send you a sim swap...
My phone was stolen today in Houston Texas, USA. Kindly block and hold my SIM till I come back to Nigeria.
Below are my details
Name: Opara Pascal
SIM#: 08161554644