How much will it cost to cancel Family Plan on T-Mobile?

[Demos V]

There's 3 lines on the plan. I was wondering what the exact amount would be to leave T-Mobile. I'm planning to switch my family to ATT and get iPhones.

[justNangel]

I assume you have a contract? if that's the case the cost to leave will depend on how long you have left til the end of the contract you can cancel at anytime but they have the right to charge you for the remainder of your contract in this case i would say it is best to see the contract out rather than pay for a service you are not having and still have to pay for a new service provider