Many people stay with a carrier longer than they want to because switching feels complicated. In practice, moving to a new carrier in the US and keeping your phone number is usually straightforward. The key is to do things in the right order.

This guide explains the steps. It is written as of October 2026. Each carrier has its own process, so check the details on your current and new carrier's official websites.

What porting means

Moving your phone number from one carrier to another is called porting. In the US, you can generally keep your number when you switch carriers, as long as your account is active and you are moving within the same area. The new carrier handles the request with your old carrier.

The most important rule: do not cancel your old service first. If you cancel before the number has moved, you risk losing the number. The port request itself usually closes your old line once it is complete.

Step 1: check your phone

Before you switch, find out whether your current phone will work with the new carrier.

  • Is it unlocked? A locked phone only works with the carrier that sold it. You can usually check in your phone's settings or by asking your current carrier. See our guide to unlocked phones for more detail.
  • Is it compatible? Most modern phones work across major US networks, but it is worth checking. Many carriers have a compatibility checker on their website where you enter your phone's IMEI number.
  • Does it support eSIM? Many newer phones use eSIM, which can make switching quicker because you do not need a physical SIM card.

Step 2: check what you owe

Look at your current account for anything that could cost you money when you leave:

  • Phone balance. If you are still paying off a phone, the remaining balance may become due when you leave.
  • Bill credits. If your phone deal used bill credits, these usually stop when you leave, which can increase what you owe.
  • Early termination fees. Less common today, but check your agreement.
  • Final bill. You may receive a final bill for the current period.

Knowing these figures helps you decide whether now is the right time to switch. Your current carrier can confirm the exact amounts.

Step 3: get your transfer details

Your new carrier will ask for information to request the port. This usually includes:

  • Account number with your current carrier.
  • Transfer PIN or number transfer PIN. Many carriers now require you to generate this in their app or online account.
  • Account holder name and billing address, exactly as they appear on your current account.
  • The phone number you want to move.

Write these down carefully. Mismatched details are a common reason a port is delayed.

Step 4: choose your new plan

Pick your new plan before you start the transfer. Compare coverage, the real monthly cost and any conditions. Check the current price on the new carrier's website, including taxes, fees and autopay terms.

Step 5: start the switch with the new carrier

Sign up with your new carrier online, in an app or in a store, and choose the option to bring or transfer your number. Enter your transfer details when asked.

If you are using a physical SIM, insert the new SIM card when instructed. If you are using eSIM, follow the carrier's instructions to download and activate it.

Step 6: wait for the transfer to complete

Many transfers complete quickly, but some take longer, especially if details need to be checked. During this time, your old service may keep working until the transfer completes.

Once the transfer is done:

  • Make a test call and send a test text.
  • Check that mobile data works.
  • Check that your voicemail works, and set it up again if needed.

Step 7: tidy up

After your number is working with the new carrier:

  • Confirm with your old carrier that the line is closed, and watch for a final bill.
  • Pay any remaining balance you owe.
  • Return any equipment if your old carrier requires it, such as a leased device or a hotspot.
  • Update any accounts that use your phone for two factor authentication, if anything changed.

Protect yourself from scams

Number transfers can be targeted by fraudsters who try to move your number without your permission. To protect yourself:

  • Never share your transfer PIN with anyone who contacts you unexpectedly.
  • Set up an account PIN or passcode with your carrier.
  • Ask your carrier about number lock or port protection features, if they offer them.

Switching made simple

Switching carriers and keeping your number is mostly about order and preparation. Check your phone, understand what you owe, gather your transfer details and let the new carrier start the transfer before you close anything. With those steps done, most switches go smoothly.