Favor app-based one-time codes or hardware security keys that continue working without cell service. Keep backup codes printed and sealed in your bag, separate from devices. Disable SMS-based resets where possible to reduce SIM swap risks abroad. Test recovery paths before departure. If you manage work accounts, coordinate with your admin for emergency access. Authentication should feel boring, predictable, and available even when your phone is low, offline, or unexpectedly rebooting at boarding.
Use mobile wallets or virtual cards that tokenize your number, and set lower limits for travel. Bring at least two payment methods stored in separate places. Avoid saving cards in browsers on shared machines, and review transactions nightly. At ATMs, shield the keypad and prefer machines inside banks. If a merchant insists on a photocopy of your card, decline politely. Security here is about layers, redundancy, and never revealing more than a transaction requires.






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