I don’t know my alternative number

I have a SIM card that I don't know it's phone number again and the SIM is barred, what do I do to get the number? Here is how the sim serial ends: 40115307

My name is Felix I want to work as and agent in the network but I don't know how to get started my phone number is 09068110059

Mtn mifi I need an answer to

I want to know the year year that my MTN line was activated from another line if possible or directly from online if I don't have chance to visit the MTN centre