How can I retrieve my mtn number I lost it (08067400692)

I need to retrieve that line to re-register my WhatsApp account, as the code keeps going to that line during the registration process. Kindly assist please. Many thanks

My sim was lost and I want to retrieve it back but I didn’t have the sim...

I am in the United Kingdom. Recently, my mtn sim was lost.. I need to retrieve the sim. How can I retrieve the sim. Kindly, assist.