Two US carriers start billing $12 a day the moment you land. Nine steps to take before takeoff, and step 7 is the one almost nobody remembers.
T-Mobile's qualifying plans already include data and texting in 215+ countries: up to 5GB at high speed, then unlimited at up to 256 Kbps. Check before you buy anything.
Verizon TravelPass is $12 a day, $6 in Canada and Mexico. AT&T's International Day Pass is $12 a day, plus $6 for each extra line used on the same day.
A third-party travel eSIM only installs on a carrier-unlocked phone. Most US carriers unlock free once the device is paid off. Ask days ahead, not at the gate.
iPhones from the XS, Pixels from the 3a and Galaxy S phones since 2019 support eSIM. On Android, look under Settings > Network & internet > SIMs > Add eSIM.
Downloading an eSIM profile needs a working connection. Do it on home Wi-Fi the night before, not in a foreign terminal while hunting for a signal you cannot get.
With two lines active, set the travel eSIM as mobile data and keep your US number on for calls and texts, so bank and airline security codes still reach you.
Settings > Network & internet > SIMs, tap your US carrier, switch Roaming off. Leaving it on is what quietly triggers the day pass the minute you land.
With it enabled, your phone routes calls and texts over hotel or cafe Wi-Fi instead of a foreign network. The toggle sits under your SIM in Network & internet.
In Google Maps, search your destination city, tap its name, then Download. Search and turn-by-turn navigation then work with mobile data switched off entirely.
Every step here is free and happens on your own Wi-Fi. Do them the night before and your phone costs about the same abroad as it does at home.