Please reach out to your current mobile carrier so they can advise on how you can unlock your phone.
You may need to provide some information like your account details, phone number, and a special number called IMEI (you can find the IMEI in your phone’s settings or by dialing *#06#). Follow the carrier’s instructions. They’ll tell you how to finish unlocking your phone, like entering a code or resetting it.
Once your phone is unlocked, you can use it with Mediacom Mobile.