How To Port to MTN Ghana.

Mobile Number Portability is a service that enables you to retain your mobile number when changing from one mobile service provider to another.
To Start this Service:
Send your phone (with SIM) to any MTN Service Centre near you. The Service Centre Representative will verify your ownership of the number and give you a Porting Request Form to fill to initiate the porting process.

The Service Centre Representative will then issue you with an MTN SIM Card which will be activated with your number from your old network once the port request is approved by your old network. Remember to take along a valid Identity Card (Driver’s License, Voter’s ID, Passport, NHIS Card or National Identification Card).

source: MTNGHANA