Taiwan eSIM for 7 days: two cities and one high-speed rail transfer

How much data 7 days in Taiwan takes

A seven-day, two-city shape: Taipei then south

What sets seven days apart from five is moving base. Many Thai travellers spend three to four nights in Taipei, then ride the high-speed rail south to Tainan or Kaohsiung for another three. Tainan is an old city for walking, eating and visiting temples and markets, while Kaohsiung adds its harbour and waterfront night markets.

The high-speed ride from Taipei to Tainan or Kaohsiung does not take long, but the Tainan high-speed station sits outside the old city, so you need a local train or bus into town, which is when you will have maps open for the connection.

Where data spikes and drops in these seven days

• Transfer day: booking tickets, checking departure times, checking into a new hotel and searching for a first meal in an unfamiliar city. It is a higher-data day than a normal sightseeing day.
• Three days in Taipei: hotel Wi-Fi helps a lot, and you only use mobile data on the move and outdoors.
• Three days in the south: the pace is slower, but many shops lean on cash, and hopping between temples and markets means more route searches than you might expect.
• Scenic or cycling trips outside the city: signal is usually fine, but remote spots may weaken, so save an offline map of that area.

Which plan shape fits seven days

The estimate table gives about 4 GB light, 8 GB normal and 15 GB heavy for seven days. Only multi-country plans in our catalogue relate to Taiwan; there is no Taiwan-only plan, so check the country list on the plan page before buying.

• Fixed 1 GB valid 7 days: matches the day count, but 1 GB is well under even the 4 GB light estimate. It suits people who carry a pocket Wi-Fi or rely on hotel Wi-Fi.
• Fixed 5 GB and 10 GB valid 30 days: 5 GB covers light use, while 10 GB is the main choice for a two-city week since it sits above the 8 GB normal estimate with room for the transfer day.
• Fixed 20 GB valid 30 days: for heavy users near 15 GB who stream and share throughout.
• Daily 1–3 GB: with daily plans you count seven days of an allowance that resets each day, which suits steady users. If the transfer day runs high, one large pooled allowance is usually less awkward.

Network points when changing city

• Save a screenshot of your high-speed rail ticket and QR code in case the station is crowded and slow to load.
• A transport card from Taipei may work in some southern cities, but check in the app or at the counter rather than assuming.
• LINE and Google Maps work in both cities, whereas some ride-hailing apps may not cover every city.