Puk code retrieve code how do I get it

How will I have my puk code

My sim blocked. How can I retrieve my PUK code? 08034611456

With an alternative phone number, Dial *123*7*3# or dial *123# (MTN’s self-service USSD dial) and follow the prompt of inputting ‘7’-Self-Service, then ‘3’-Get your PUK code to...