Sign in to your T-Mobile account online or in the T-Mobile app
Contact T-Mobile customer care by calling 1-800-937-8997
Visit a T-Mobile store and request line cancellation
Ask the representative to cancel the specific line
Provide the account holder verification details
Confirm any remaining device payments, fees, or promotions tied to the line
Ask for written confirmation that the line has been canceled
Return any leased or required equipment if applicable