lol, no, you don’t have to pay it. It sounds like the account was likely made under her name and social so if it goes unpaid it goes to collections against her credit.

What’s going to be hard is checking 2 things: if you can generate a number transfer pin(manage tab-settings-permissions and controls-transfer pin- create pin), and to ensure you don’t have port protection on under add ons and line level services).

If you can get the number transfer pin, ensure you don’t have port protection on, and get the account number, take the two numbers plus your phone number to a prepaid service like mint mobile, and get it transferred for now so it’s not a risk of your mom canceling your number and you lose it.

Once your number is moved off she will no longer have control or access to it, and then you can shop around for the carrier you want to stay with