what happened when my MTN SIM is showing no signal and not working what should I do?

I bought MTN 4G router which the sim has been activated with free 50gb. I inserted the sim card in my phone but hasn't been browsing, showing "no Internet connection" what...

Please help me restore my sim to its working condition. I recently cannot make calls with it .The sim pot keep showing MTN communication unknown number and sometimes emergency...

help me my line is not activeand i've been using it for 13 years...

My name is ODIH Abraham Smith, am currently in Mali, my mobile phone number is 09034790242, I tried to use this Sim card this morning, and it showing me Sim card registration...