SIM card replacement: getting a new SIM, and doing it safely

What does a SIM card replacement involve?

A SIM card replacement is your carrier putting your existing number and plan onto a new card, or onto an eSIM, and switching the old one off. Your number doesn't live on the plastic. It lives on the account, which is why a replacement is a request to the carrier, not something a phone shop can conjure from a spare card.

That also tells you who can ask. AT&T says that, for your security, only the account owner or a retail authorised user can activate a new SIM. Verizon requires the account owner or account manager, with valid government-issued photo ID, to collect one in store. Annoying if you're the second name on a family plan. Reassuring when you think about who else might try.

We read AT&T's, Verizon's and Apple's help pages and the FCC's rules on 9 November 2026. T-Mobile's support pages refused our reader, so we don't cite them. Other carriers will differ in the detail.

Is the SIM really damaged, or just dirty?

Check before you order anything. A good share of "damaged SIM card" problems are a card that's slipped in its tray or picked up grime.

Google's Pixel help suggests wiping a dirty SIM with a microfibre cloth and reseating it; Samsung says the same with a dry cloth, for the card and the tray. Then try the SIM in another phone. If it fails there too, the card is the problem. If it works, it's the phone. Apple's last step before "you might need to replace your SIM card" is asking a carrier store to test with another SIM, which is a free diagnosis worth taking.

A card that's bent, cracked or snapped across the gold contacts is a replacement, no question.

How do I get a new SIM card?

The routes are similar at the two big US carriers whose pages we read.

AT&T. Buy a SIM kit in a store, on att.com or from another retailer; each kit includes three SIM sizes, though AT&T suggests checking your phone's size first. Then activate it by calling 800.331.0500 or in a store. Prepaid customers pick up a replacement SIM or eSIM activation card at an AT&T store or a national retailer.

Verizon. Order a new or replacement SIM in My Verizon, or walk into a Verizon store, which does same-day replacement. Authorised retailers supply SIMs within three days.

Neither page we read lists a fee. So "how much is a new SIM card" doesn't have a published answer from these two; ask before you pay, and be suspicious of a large one.

If you need to get the old card out first, our guide to removing a SIM card from an iPhone covers the tray, and the US iPhones that no longer have one.

Replace the SIM with an eSIM instead

This is our first choice if your phone supports it. Verizon's FAQ says it directly: before getting a new SIM card, check whether your device has an eSIM you can use instead.

AT&T lets you reissue an eSIM yourself: sign in to your wireless account in a browser, then Device options > Manage your SIM > Get a new eSIM > Get started. That only appears if your line already uses an eSIM, though. AT&T also gives a quick compatibility test: dial \*#06#, and if an EID number appears, the phone supports eSIM. Pixel 8 and later can convert a physical SIM to eSIM from Settings > Network & internet > SIMs, after which the old card stops working.

The long version is on convert SIM to eSIM, and moving a line to a new handset is in how to transfer an eSIM.

SIM-swap fraud: the replacement you didn't ask for

Everything above is the legitimate version. SIM-swap fraud is the same process run by someone else: they persuade your carrier to move your number to a SIM they control, then catch the text-message codes your bank and email send.

The FCC adopted rules in November 2023 requiring US wireless providers to use secure methods of authenticating a customer before moving a number to a new device or provider, and to notify customers immediately whenever a SIM change or port-out request is made on their account. Take those notifications seriously. A "your SIM has been changed" text you didn't trigger is an emergency, not spam.

What we'd do, on any carrier:

• Set an account PIN or passcode with your carrier, separate from your SIM PIN.
• Switch your important logins away from SMS codes to an authenticator app where the service allows it.
• Turn on a SIM PIN. Verizon describes the PUK as protection against SIM theft; on an iPhone it's under Settings > Cellular > SIM PIN. Apple warns never to guess a PIN or PUK, because a wrong guess can lock the card for good.
• Treat sudden "No service" in a place that normally has signal as a reason to call your carrier from another phone.

Lost your SIM abroad?

This is the awkward case, and the carrier pages don't help much. Neither AT&T's nor Verizon's page we read mentions shipping a replacement SIM overseas. Assume a new physical card waits until you're home.

You have two realistic routes.

Reissue your home line as an eSIM. If your line already uses an eSIM and your carrier lets you reissue it online, as AT&T's account page does, you may be able to restore your own number from a hotel Wi-Fi connection. That gets back the thing you'll miss most: text-message codes from your bank.

Use a local SIM or travel eSIM as a stopgap. For data, maps and messaging apps, you don't need your home SIM at all. A travel eSIM installs over Wi-Fi in minutes; a local SIM means a counter and, in most countries, a passport. Our where to buy a SIM card in Spain, Mexico, Canada and India guides cover the counters and the ID rules, and cheapest eSIM ranks the eSIM option by price per gigabyte. Messaging apps tied to your number generally keep working on the same phone over any data connection; the trouble starts only if they ask to re-verify by SMS.

If the phone went too, call your carrier first and suspend the line. A stolen SIM in someone else's hands is the SIM-swap problem with the hard part already done.