After you switch: set a SIM PIN, port-out lock & password manager in 20 minutes

Your phone number is the reset key for your bank, email and everything else — which is why SIM-swap and unauthorized port-out fraud target carrier accounts. Switching carriers forces you to touch all the right settings anyway, so spend 20 minutes locking the new account down properly.

Minutes 0–5: Set a SIM PIN

A SIM PIN stops anyone from taking your SIM (or eSIM profile details) and using it in another phone. On iPhone: Settings → Cellular → SIM PIN. On Android: Settings → Security → SIM card lock. Change the default (often 1111 or 1234) to something only you know — and store it in your password manager, because three wrong entries lock the SIM until you get a PUK code from your carrier.

Minutes 5–10: Turn ON the port-out lock at your new carrier

The same protections our switching guides tell you to disable on your old carrier — T-Mobile's Port Out Protection, Verizon's Number Lock, and equivalents elsewhere — should be switched back on at the new carrier the day your port completes. With the lock on, nobody can port your number away without passing through your account's security first.

Minutes 10–15: Give the carrier account its own strong password

Your carrier login can authorize number changes, so it deserves a unique, generated password — never a reused one. Turn on the carrier's two-factor option as well, and set an account passcode you'd never use anywhere else.

Minutes 15–20: Install the password manager

You're re-logging into apps on the new setup anyway — make this the moment every important account gets a unique password stored in a manager. Our password manager & VPN guides covers the picks: 1Password ($4.99/mo) for families, Bitwarden (free) as the best no-cost option, plus the VPNs worth running on public Wi-Fi after the switch. Do these four things once, and your cheaper plan is also a safer one.