I cannot make call on my mtn sim but I can receive calls why?

I need to been receiving calls

Why can't I make or receive calls with My Nigeria Mtn here in...

Sim can’t receive call or call out even I can’t receive messages or send messages please help me and I can’t be able to go mtn office because am disable 08141977719

Why can't i receive or make calls with my Nigerian Mtn sim card here in the UAE? I have tried to reconnect my MTN Nigeria and is not coming up. I also enter the number in MTN...