How to check phone number on any network

Have you been in such a situation that you get confused not knowing exactly your phone numer especially for people like us who have more than a sim #winks

How to check phone number of your simcard

MTN:  Dial  *123#, then an option will come,select 1, then another option will 
popup, select 1 again and the number of that SIM will display 

AIRTEL: to check your AIRTEL number simply dial *121#,.then reply the message 
with 1, another message will come,reply it with 5 also, and the number 
will display 

GLO:  Dial *135*8# and the number will 
display instantly 

ETISALAT: dial *248# and the number will display immediately.