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Landing in a new country with no data is a specific kind of modern helplessness. You have a supercomputer in your hand and you can’t find your hotel. I’ve tried every option across Japan, Korea, and Thailand. Here’s where I ended up.
The answer for most people: an eSIM, bought before you fly
If your phone supports eSIM (anything recent does), buy a plan from Airalo, Ubigi, or the airline of the country you’re visiting, and install it at home on real wifi. The whole thing takes five minutes and the plan activates when you land.
What I buy:
- Japan: Ubigi, 10GB for 30 days, around 17 dollars. Runs on NTT docomo’s network, which covers everything including the subway.
- Korea: almost any eSIM works well; the coverage is absurd. Airport wifi at Incheon is fast if you stall on buying.
- Thailand: an AIS or dtac tourist eSIM. Cheap, fast, sold in-app or at the airport counter if you prefer a human.
When a physical SIM still wins
Two cases. Your phone is older or region-locked, or you want a local phone number for restaurant reservations and delivery apps (this matters in Korea more than anywhere). Airport counters sell tourist SIMs with ID; bring your passport, it takes ten minutes.
Pocket wifi is for groups
The rental hotspot made sense exactly once: four of us splitting one device in Japan. One battery to babysit, one thing to forget in a cafe, but a quarter of the price each. For a solo traveler it’s an extra chore with a daily fee.
Set this up before boarding, not after landing
- Install the eSIM at home, activate on arrival.
- Download offline maps for your first city (Google Maps offline, or Naver for Korea, where Google barely works).
- Screenshot your hotel name and address in the local script, and write it on an index card. The card doesn’t have a battery.
The mindset part
Data anxiety is arrival anxiety. The first hour in a new country is the hardest one, and a phone that works when the wheels touch down removes about half of it. Seventeen dollars is cheap for that.
Buy the eSIM at home, on your couch, a week early. Future you, standing in the arrivals hall with a working blue dot on the map, can go find the train instead.
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