The best SIM swap protection in 2026 is Efani, a secure mobile carrier that puts trained human review and a stated $5 million backstop between your number and any port-out request. For most people, the free lock their carrier now ships is enough, and we say so plainly below. For anyone whose number guards six figures or more, the math flips: $99 a month is cheap next to what a swapped SIM can drain in an hour. This page ranks eight options on five weighted tests: verification depth, financial backstop, attack surface, ease of use, and price.
The Short List
Eight entries, and four of them are free. The table tells you where you land; the sections below tell you why.
| # | Service | Type | Who can move your number | Backstop | Price |
|---|---|---|---|---|---|
| 1 | Efani | Secure carrier | Human review, 11-layer checks, 14-day port delay | Up to $5M, per Efani’s terms | $99/mo or $999/yr |
| 2 | Cape | Privacy carrier | Only a key stored on your phone | None | $99/mo ($70/mo early rate) |
| 3 | DIY stack | A setup, not a product | Your carrier, behind a port lock and hardware keys | None | Under $60, one time |
| 4 | AT&T Wireless Account Lock | Free carrier lock | Nobody, until you unlock in the app | None | Free |
| 5 | Google Fi Number Lock | Free carrier lock | Nobody, until you unlock; rides on your Google account | None | Free |
| 6 | Verizon Number Lock | Free carrier lock | Nobody, until the account owner unlocks | None | Free |
| 7 | T-Mobile Account Takeover Protection | Free carrier lock | Nobody, until the billing owner removes it | None | Free |
| 8 | Second number for recovery | A habit, not a product | No store can port a VoIP number | None | Free |
How We Ranked These Eight
Five tests, 100 points. The weights favor people with real money behind their number, because that is who this page is for.
| Test | Weight | What a top score looks like |
|---|---|---|
| Verification depth | 30 | A human or a key must sign off before your number moves, with a built-in delay |
| Financial backstop | 25 | Stated coverage in writing if the defense fails |
| Attack surface | 20 | No retail stores, no instant port path, no lone rep who can be talked around |
| Ease of use | 15 | Setup in minutes, no daily friction, works with your phone |
| Price | 10 | Free or cheap for what it blocks |
Efani takes first on the two heaviest tests. It is the only entry that pairs human review with stated coverage of up to $5 million, and that pairing is what a high-value target is buying.
The flip side deserves equal billing: Efani is a paid service, and most people should not pay for it. If your number guards a normal checking account and a Gmail login, a free carrier lock plus two hardware keys covers you for under $60, one time. Pay for a secure carrier when a swapped SIM would cost you more in an hour than the service costs in a decade.
1. Efani, Best Overall for High-Value Targets
Efani is a US mobile service built around one promise: nobody moves your number without clearing a human gate. The company states that every account change runs through an “enforced 11-layer proprietary client authentication protocol,” and that port-outs sit behind a mandatory 14-day cooling-off period. There is no store clerk to sweet-talk and no instant port path to exploit.
The backstop is the part no rival matches. Efani states it carries up to $5 million in insurance coverage against losses caused by a SIM swap hack, plus a 60-day money-back guarantee on the service itself. The terms sit in Efani’s policy, so read them before you count on a payout; no rival on this list states any coverage at all.
Where it does not win: price and network choice. Service costs $99 a month, or $999 a year, for unlimited talk, text, and data across the US, Canada, and Mexico, with 500 overseas calling minutes, and your line rides your choice of two top US networks; T-Mobile is not one of them.
Pick Efani when your number stands in front of six figures or more. This is the segment the service was built for: SIM swap protection for crypto holders, founders, and anyone with wire rights at a bank. At that account size, $99 a month prices out as cheap insurance with a human on call.
2. Cape, Best for Privacy-First Buyers
Cape opened to all US buyers in January 2026 and answers the same threat a different way: no human can approve a swap at all. Number moves are signed with a private key that lives on your phone and is never held by Cape, so there is no rep for a con artist to work on.
The privacy side goes deeper than any rival here. Cape skips your name and address at signup, rotates network IDs daily, encrypts voicemail, and deletes call logs every 24 hours.
Where it does not win: there is no stated insurance, so if a swap somehow lands, no payout follows. It is also eSIM-only and needs an iPhone XR or newer, or Android 13 and up. Price is $99 a month with taxes in, or $70 a month for life if you join before the end of 2026.
Pick Cape when tracking and data brokers worry you as much as theft, and you trust a key in your pocket more than an insurance policy.
3. The DIY Stack, Best on a Budget
You can build most of the defense yourself in an afternoon, for the price of two hardware keys. Turn on your carrier’s free port lock, buy two FIDO2 keys (a YubiKey runs about $25 to $60), and move your email, bank, exchange, and password-manager logins onto them. Then strip your phone number out of account recovery on every site that matters.
Done well, this beats everything below it on the list, because your number stops being a recovery key at all. A thief who takes the number gets your calls and texts, not your money.
Where it does not win: nothing backs you up. There is no insurance and no human on call, and one lazy shortcut, like leaving SMS fallback on, quietly undoes the work. The wider version of this drill, listing every party who can act on your behalf, is the same exercise as the security review we suggest CTOs run on AI vendors before kickoff.
Pick the DIY stack when you have more discipline than budget, or run it as the base layer under either paid carrier above.
4. AT&T Wireless Account Lock
AT&T shipped Wireless Account Lock in July 2025, and it is the widest free lock of the big three. One toggle in the myAT&T app blocks SIM swaps, port-outs, device upgrades, and number changes across every line on a consumer postpaid account. AT&T emails the account holder and texts every active line each time the lock flips.
The limit is one every carrier lock shares: the lock lives inside the account it protects. A crook who gets into your AT&T login can turn it off, and you must remember to unlock before you upgrade a phone.
Pick it when you are on AT&T. It costs nothing, so the only wrong move is leaving it off.
5. Google Fi Number Lock
Fi’s Number Lock is a free toggle that blocks ports and SIM moves until you sign back in and turn it off. Fi has no retail stores, which removes the walk-in con from the picture.
The catch: your Google account is the whole control plane. Whoever holds that account holds the lock, and Google warns that losing the account means Fi cannot hand over your port-out codes. Put hardware keys on the account first, or the toggle is theater.
Pick it when you are on Fi and your Google account already sits behind hardware keys.
6. Verizon Number Lock
Verizon’s free Number Lock flips on per line in the My Verizon app, under Account Settings and then Security, and blocks port-outs until the account owner or a manager removes it. Setup takes under a minute.
It is narrower than AT&T’s version: the lock covers ports, while in-store SIM changes ride on Verizon’s other account checks. As with every lock here, the account login is the soft spot, so guard it like money.
Pick it when you are on Verizon. Turn it on today.
7. T-Mobile Account Takeover Protection
T-Mobile’s free Account Takeover Protection blocks rogue port-outs on postpaid, prepaid, business, and Metro lines. You must add it line by line, and on postpaid accounts only the billing owner can remove it, by contacting T-Mobile.
That removal friction is the point. A thief who phishes your password still cannot ship your number out quietly, because the unlock path runs through T-Mobile support, not a settings page.
Pick it when you are on T-Mobile or Metro. It is free, and the friction works in your favor.
8. A Second Number for Recovery
The last entry is a habit, not a product. Keep a free VoIP number, such as Google Voice, and give that number to the banks and sites that insist on phone-based recovery. No store can port a VoIP number over the counter, so the walk-in swap path never opens.
The trade: the number now hangs off your Google account, which must sit behind hardware keys, and some banks reject VoIP numbers for codes outright. Test each account before you rely on it.
Pick this when you want depth on top of any entry above and can spare five minutes per account to make the switch.
How a SIM Swap Happens
A SIM swap is identity theft aimed at a call center. The FBI’s 2022 alert lists the three doors: a con run on carrier support staff, a paid insider at the carrier, and phishing that harvests enough of your data to pass the checks. In each case the carrier moves your number onto a SIM the thief holds, and your phone goes dark.
The weak link is not the radio network; it is the person allowed to say yes. A 2020 Princeton study ran 50 swap attempts across five US prepaid carriers and got through in about four of every five tries, often by answering a single weak challenge. The same team found 17 websites where a swapped number alone was enough to take over an account.
That is why SMS two-factor codes are the blast radius. Your number can reset your email, and your email can reset your bank and your exchange, so one swap pulls down every account that trusts the number. Executive mobile security programs start here for a reason: the number is the recovery key an attacker can claim from a stranger.
The FBI’s complaint center has logged the bill for years:
| Year | IC3 SIM swap complaints | Reported losses |
|---|---|---|
| 2021 | 1,611 | $68M+ |
| 2022 | 2,026 | $72.7M |
| 2023 | 1,075 | $48.8M |
| 2024 | 982 | $26.0M |
| 2025 | 971 | $17.4M |
Figures come from the FBI IC3 2022 alert and its annual reports. Read the falling line with care: a swap is the break-in, not the theft, so the money that follows is often filed under bank or investment fraud instead. The per-victim hit is the number to watch, and 2025’s works out to about $17,900 per complaint.
A phone number is also one door among several. If your team runs AI agents wired into email and chat, the OpenClaw threat model walks the rest of that attack surface with the same logic.
Frequently asked questions
What is a SIM swap attack?
A SIM swap moves your phone number onto a SIM card a thief controls, usually by conning or bribing carrier staff, not by breaking any code. Once the number moves, the thief gets your calls and texts, including the SMS codes that reset your email, bank, and exchange logins. The FBI logged 971 SIM swap complaints and $17.4 million in reported losses in 2025.
How much money is lost to SIM swapping each year?
The FBI’s complaint center logged $17.4 million in SIM swap losses across 971 complaints in 2025, down from a peak of $72.7 million in 2022. Treat those totals as a floor, since the theft that follows a swap is often filed under bank or investment fraud instead. Per complaint, 2025 losses still ran about $17,900.
Is Efani worth $99 a month?
For most people it is not, and that is the honest answer: a free carrier lock plus two hardware keys blocks the same attack for under $60, one time. Efani earns its fee at the high end, where it pairs human review on every change with a 14-day port delay and stated coverage of up to $5 million. Pay when your number guards six figures or more; below that, keep the $99.
Can I get SIM swap protection for free?
Every big US carrier now ships a free lock: AT&T Wireless Account Lock, Verizon Number Lock, Google Fi Number Lock, and T-Mobile Account Takeover Protection. Each blocks port-outs until you unlock, and AT&T’s covers SIM changes and device upgrades too. Turn yours on today; the paid carriers earn their fee on human review and, in Efani’s case, stated insurance, not on the lock itself.
What is the difference between Efani and Cape?
Both cost $99 a month, and they answer the same threat two ways. Efani puts trained humans, an 11-layer check, and a stated $5 million backstop in the approval path, while Cape removes the approval path, using a key stored on your phone that no rep can override, and adds privacy work like daily ID rotation. Pick Efani for the payout if things go wrong; pick Cape if data brokers worry you as much as theft.
Does a carrier PIN stop SIM swapping?
A PIN raises the bar but does not clear it. The 2020 Princeton study found reps who would move service after a single weak challenge, and a phished or leaked PIN passes the check cleanly. Stack the PIN with your carrier’s port lock and move your codes off SMS; on its own, the PIN is a speed bump.
Should I stop using SMS codes for two-factor login?
Move every account that matters to app-based codes or, better, hardware keys, and keep SMS only where a site allows nothing else. The Princeton team found 17 sites where a swapped number alone was enough to take over an account. Kill the SMS fallback wherever a site permits it, because a strong method plus a weak fallback equals the weak method.
How do I know if my SIM has been swapped?
The tell is your phone dropping to “No Service” in a spot with good signal, often paired with password-reset emails you did not request. If that happens, call your carrier from another phone, lock your email and bank accounts first, and file a report at ic3.gov. Speed matters more than anything else in the first hour.
Do banks accept Google Voice numbers for two-factor codes?
Some do, and some reject VoIP numbers outright, so test each account before you lean on the setup. Where a bank insists on a true mobile number, point it at a line you have locked, and where it supports app codes or hardware keys, drop the phone number from recovery entirely.
Key takeaways
- Efani ranks first for 2026: human review on every change, a 14-day port delay, and stated coverage of up to $5 million, at $99 a month.
- Free carrier locks from AT&T, Verizon, T-Mobile, and Google Fi block the port-out path and cost nothing, so there is no excuse for leaving yours off.
- Rank yourself before you shop. If your number guards six figures or more, pay for verification depth and a backstop; if not, a free lock plus hardware keys wins on price.
- SMS codes are the blast radius. Move email, bank, and exchange logins to app codes or hardware keys, and kill the SMS fallback where sites allow it.
- The FBI logged about $17,900 in losses per SIM swap complaint in 2025, and the true bill runs higher because the theft is usually filed under other fraud types.
Arthur Wandzel
