How to Switch Carriers & Keep Your Number (2026)

What you need before you start

A port request is matched against your old carrier's records. If any detail is wrong, the request is rejected — usually silently, leaving you to discover it a day later. Gather these first:

• Your account number with the current carrier — not your phone number. It's on the bill or in the account app.
• Your transfer PIN or port-out PIN. This is separate from your voicemail PIN and often has to be generated on request; it typically expires within days.
• The account holder's name and billing address exactly as the old carrier has them. A middle initial or an abbreviated street can fail a match.
• Your phone number, and confirmation the line is active and not suspended.
• The device's IMEI, if you're bringing your own phone. Dial *#06# to display it.

Step 1 — Confirm the phone will work on the new network

Compatibility is the single most common reason a switch disappoints rather than fails. A phone can activate successfully and still get materially worse coverage, because the low-band frequencies that carry signal indoors and at distance differ between networks. Run the new carrier's IMEI checker before you commit, and read the band detail rather than the pass/fail badge.

Step 2 — Check whether you owe anything on the phone

An unpaid device balance doesn't block a port, but it does become immediately due, and a device on an active installment plan generally can't be unlocked. If you're mid-contract on a financed phone, the exit cost is the remaining balance — factor it into the comparison rather than treating it as a surprise.

Step 3 — Buy the new plan but don't activate the eSIM yet

Order the SIM or purchase the eSIM plan and stop there. Most carriers let you complete the purchase and hold activation until you're ready, which means you can do the paperwork on a weekday when support is staffed rather than discovering a problem on a Sunday night.

Step 4 — Request the port during business hours

Start the transfer on a weekday morning. Wireless-to-wireless ports usually complete within a few minutes to a few hours, but when one stalls it needs a human at one or both carriers, and that's only available during business hours. Never begin a port on a Friday evening.

Step 5 — Test before you trust it

1. Place an outbound call and receive an inbound one from a different network.
2. Send and receive an SMS and an MMS with a photo attachment.
3. Turn Wi-Fi off entirely and load a page on cellular data.
4. Send a group message — group MMS is the feature most likely to break after a port.
5. Confirm two-factor codes arrive. Bank and authenticator SMS sometimes lags a port by a few hours.
6. Test at home, at work, and anywhere you regularly have marginal signal.

Step 6 — Only now, confirm the old account closed

The old line should terminate on its own. Verify it actually did, because a line that stays open keeps billing. Ask specifically whether a final prorated invoice is coming, and whether any device credits you had been receiving are now void.

Two things that surprise people afterward

First, autopay discounts on the new plan often take a full billing cycle to appear, so the first bill looks higher than advertised. Second, if you left a postpaid carrier mid-promotion, remaining bill credits stop immediately — that is usually the largest single cost of switching, and it's the reason to check the credit schedule before starting.