How much data do you need for your trip?
Start with your travel days and usage. Get a planning estimate, then compare eSIM packages for your destination.
A package size to compare
5 GB
Japan
7 days of regular use, with a 20% planning buffer.
Compare Japan plansThe comparison starts with at least this data allowance and validity. Daily or weekly allowances have different reset rules: check the details before buying. This estimate is not a guarantee of your actual use.
The assumptions behind the estimate
These are illustrative daily allowances selected for planning, not measurements from your phone:
- Light: 0.15 GB per day, when you mostly message, navigate and use Wi-Fi for larger tasks.
- Regular: 0.5 GB per day, allowing more browsing, photo sharing and social apps.
- Heavy: 1.5 GB per day, for more video or tethering. Long video sessions or large downloads can exceed this.
We multiply the allowance by your travel days, add a 20% buffer, and round up to an illustrative package size. Actual catalog packages vary. Your recent phone usage is a better starting point if you can check it.
Examples for 7 and 14 days
For 7 days of regular use: 7 × 0.5 GB = 3.5 GB. With the buffer, that is 4.2 GB, rounded up to a 5 GB comparison. For 14 days, the same assumption gives 8.4 GB with the buffer, so start by comparing 10 GB packages.
Make your package last longer
- Download maps and entertainment over Wi-Fi before you travel.
- Disable mobile data for app updates, backups and automatic high-resolution video.
- Check which line your phone uses for data and whether your home SIM can incur roaming charges.
- If you work through a hotspot, include your laptop's downloads and cloud backups in the estimate.
Compare Japan eSIMs · Thailand · USA · Europe
MyBesteSIM is operated by eSIM Marketing LLC at mybestesim.com. We may earn commissions from some provider links. Read how we compare.