Can i bring my lines for CUG?

This is a voice service that allows employees of corporate organizations make unlimited mobile calls, free of charge to co-employees at a flat monthly rate.
All employees with MTN SIMs registered in a particular corporate organization’s CUG will enjoy free voice calls to each other during pre-specified time periods.
To start, you need at least (10) participants.
You should also have a certificate of incorporation to be eligible.