To cancel a line on T-Mobile, the single most important rule is this: if you want to keep your phone number, never cancel the line yourself. Instead, transfer (port) your number to your new carrier first, and the T-Mobile line will cancel automatically once the port completes.
Before you cancel a line on T-Mobile: port your number out first
If you intend to keep your phone number when switching carriers, do not call T-Mobile to cancel your line. Initiating a cancellation yourself can cause you to lose your number or experience service interruption. Instead, begin the port-out process with your new carrier. This transfer automatically cancels the T-Mobile line once it is completed. When porting a number, you will need your T-Mobile account number, account PIN or passcode, and a Temporary Port Out PIN. Gather these before contacting your new provider to ensure a smooth transfer.
Understand the financial impact of canceling a line
Canceling a line on T-Mobile affects your bill in several specific ways, and knowing them upfront prevents surprises. T-Mobile no longer prorates your final bill. If you cancel in the middle of your billing cycle, you are responsible for paying for the entire current billing cycle. Cancellations are future-dated and typically take effect at the end of your current billing cycle, so you remain responsible for all charges and usage through that date.
Any remaining Equipment Installment Plan (EIP) balances for devices tied to the canceled line will continue to bill monthly if other lines remain active on your account. If the entire account is canceled, any remaining device balances become due on your final bill. Additionally, canceling a line may impact promotional credits tied to that specific line, causing them to end. Canceling lines can also affect multi-line discounts or rate plans that require a certain number of active lines, potentially requiring a plan change or increasing the cost of remaining lines.
Contact T-Mobile customer service to cancel
When you are ready to cancel a line outright (and you are not porting your number), you must contact T-Mobile by phone. T-Mobile does not provide the option to cancel a line online through the website or app. Call 611 from your T-Mobile phone or 1-800-937-8997. Before calling, have your account information ready, including the phone number of the line you want to cancel and your account PIN or passcode. A representative will guide you through the cancellation process and confirm the financial impact.
Return devices and settle your final bill
After canceling a line, you must return any leased or financed devices associated with it. Follow T-Mobile's instructions for returning equipment, which may involve shipping the device back or visiting a retail location. For T-Mobile Home Internet lines, the gateway and any mesh Wi-Fi extender must be returned within 14 days of cancellation to avoid a non-return fee of up to $370 plus tax. This process of canceling mobile orders and carrier service requires careful attention to deadlines. Finally, review your final bill and settle all outstanding charges, including any usage fees, EIP payments, or other balances, to close the account cleanly.
Special cases: prepaid and home internet cancellations
For prepaid accounts, the process differs. For prepaid accounts, you must contact T-Mobile to cancel a line, or it may automatically cancel after 120 days in "Not Paid" status if funds run out and AutoPay is off. Do not assume a prepaid line cancels immediately when you stop paying. For Home Internet lines, the cancellation process follows the same phone-based procedure, but the key difference is the strict device return policy: the gateway and any mesh extender must be returned within 14 days to avoid the non-return fee.
Frequently Asked Questions
Can I cancel a T-Mobile line online?
No. T-Mobile does not allow you to cancel a line through its website or app. You must call customer service at 611 or 1-800-937-8997 to cancel a line.
What happens to my phone number after I cancel?
If you cancel the line yourself without porting, your phone number will be released and may become available for use by another carrier. To keep your number, always port it to your new carrier before canceling.
Will I be charged an early termination fee?
T-Mobile may charge an early termination fee if you cancel a line before the end of your contract term. Additionally, you will owe any remaining device payments and are responsible for the full current billing cycle since T-Mobile no longer prorates final bills.
What if I only want to pause or suspend my line instead of canceling?
T-Mobile offers options to suspend service for specific situations, such as military deployment or travel. Contact customer service to discuss suspension options, which may avoid the permanent effects of cancellation on your number and device payments.
