Check hotspot before you buy
Not every travel plan permits tethering. The plan page should state hotspot or personal hotspot support explicitly. If it is missing, assume it is blocked or throttled.
Also confirm:
- Total data versus a daily cap, and what happens when it runs out.
- Validity start: install versus first connection.
- Whether video or hotspot traffic is deprioritized.
Those same fields matter for any destination plan, including Thailand and Japan.
How fast a laptop uses travel data
Phones browsing maps use a modest amount. Laptops do not:
- OS updates and app stores can consume a gigabyte in minutes.
- Video calls sit in the hundreds of MB per hour.
- Cloud photo or drive sync will keep running in the background.
Use the data planning guide and add laptop hours on top of phone usage. If two people share one phone hotspot all day, a regional or larger country plan is usually cheaper than buying two small ones.
Practical setup
- Install the eSIM at home on Wi-Fi using the installation guide.
- Set the eSIM as the default data line, enable data roaming, and disable data on the home SIM — same as the dual SIM checklist.
- On the laptop, turn off automatic updates and pause cloud sync before you tether.
- Watch remaining allowance in phone settings or the provider app.
If hotspot is disallowed on the plan you need for coverage, a pocket Wi-Fi or café Wi-Fi is the fallback — see Japan eSIM or pocket Wi-Fi.
When hotspot is the wrong tool
Hotel or café Wi-Fi is still better for large downloads. Hotspot is for maps, tickets, messaging and short work sessions when you are between networks. Treat the travel allowance as finite, and the laptop as the fastest way to empty it.