Your phone connection, transport card and spending money solve different problems. A SIM does not provide a payment method. A prepaid shopping balance may be separate from its transit balance. An ordinary bank card does not automatically work at a subway gate.
Match each task with its tool
| Task | What you need | What to verify |
|---|---|---|
| Maps, messages and booking access | A working mobile-data connection or Wi-Fi | Coverage, device compatibility, activation and any calling/SMS requirements. |
| Local public transport | A supported transport card/pass or the service’s own ticket | Usable balance, covered route and boarding direction. |
| Meals, shops and accommodation | An accepted bank card, prepaid payment method or cash | Merchant acceptance and a separate backup. |
Set them up in this order
- Keep the hotel address and booking reference available offline.
- Activate your selected phone plan and test data away from Wi-Fi.
- Look up the exact first transport journey.
- Buy its ticket or load the relevant transit balance. Do not buy a tourist pass before checking coverage.
- Keep the cash reserve separate from the money loaded onto a transport card.
If you are short of time before a departure, buy the necessary transport ticket first and postpone optional shopping-card setup. Do not miss a usable connection because you are comparing rewards programmes.
Follow the guide for the part you have not solved
- eSIM versus physical SIM: data, phone number, SMS and activation conditions.
- Physical T-money: purchase, load, tap and refund steps.
- Travel-card comparison: pass coverage, separate balances and a cost calculation.
- Cash reserve: replace the assumptions in a three-day or seven-day example.
- Foreign-card payments: distinguish a merchant decline from a transit or online-verification problem.
A worked arrival example
You have a compatible phone, a working overseas bank card and a hotel near an airport-rail stop. Your minimum setup may be mobile data, the correct rail ticket and a small cash reserve. A second prepaid shopping card is an optional extra, not an automatic requirement.
If the hotel requires a local phone call to release an entry code, a data-only plan may not solve that task. Arrange a compatible calling method or a different contact channel with the hotel beforehand. That changes the phone decision; it does not change which transit ticket your first ride needs.
This page was reorganized September 7, 2026 to keep setup decisions in one place without repeating the detailed instructions. The linked guides contain the relevant operator evidence; no single combination is presented as suitable for every visitor.