When you disconnect your line from Mediacom Mobile, you can designate one of the additional lines as the new account owner. Once you leave, they take over the Mediacom Mobile account, managing all other lines.
If you disconnect your line without selecting a new account owner or if your account is disconnected due to non-payment, all lines on the account will be disconnected. For more assistance, contact the Mediacom Mobile Customer Care Team at 855-699-6655.