Switching Carriers Without Losing Your Number or Getting Hit With Fees

Pull up your most recent bill or log into your carrier account and look for two things: the end date of your billing cycle and any early termination fee (ETF) or remaining device installment balance. Month-to-month plans typically carry no ETF. Older annual contracts may still apply one. If you're mid-installment on a financed device, that balance doesn't disappear when you leave — it's billed separately.

Timing your switch to land just after your billing cycle ends can help you avoid paying for days of service you won't use on the old plan.

A carrier-locked phone can only connect to its original carrier's network. Most U.S. carriers are required to unlock devices once they meet eligibility criteria — typically that the phone is fully paid off and the account is in good standing. Check your carrier's unlock policy, then submit an unlock request through their app, website, or customer service line.

Once unlocked, test the phone by inserting a SIM from a different carrier if one is available to you. If you have a newer device, review how eSIM activation differs from a physical SIM swap to understand your options.

Number porting — the transfer of your existing phone number to the new carrier — requires your current carrier's account number and your account PIN or transfer PIN. These are not the same as your phone's lock screen PIN. Find them on your bill, in your carrier app, or by calling customer service. Write them down exactly; even a single digit error will delay the port.

You'll also need your phone's IMEI number and your billing zip code. Dial *#06# to display the IMEI on most devices.

Complete the new carrier's sign-up process and, when prompted, choose to transfer your existing number rather than receive a new one. Enter your old account number, PIN, and billing zip code accurately. The new carrier will submit a port request to your old carrier on your behalf.

Under FCC rules, your old carrier cannot block or unreasonably delay a valid port request. The process typically completes within a few hours for wireless-to-wireless transfers, though it can occasionally take up to one business day.

Once the new carrier confirms your account is ready, insert the new SIM card or scan the eSIM QR code they provided. Follow the on-screen activation steps. Calls, texts, and data should begin routing through the new carrier's network as soon as the port is complete.

Test all three: make a call, send a text, and load a webpage over mobile data (with Wi-Fi turned off). If something doesn't work, restart the device before contacting support — most activation issues resolve with a reboot.

After the port completes, your old carrier should automatically close your account. Verify this within a day or two by logging into your old account or calling customer service. Confirm no additional charges are pending beyond your prorated final bill or installment balance. Save or screenshot your final statement for your records.