You can buy one-off or recurring data plans from eSIM mobile service providers such as Ubigi.
A One-Off data plan is an allowance that is available one time during a specified period.
For example a 3GB JAPAN valid 30 days: you can use up to 3GB in Japan during/valid 30 days from the day you purchased this one-off plan.
A Recurring data plan is an internet pack with a data allowance that is renewed automatically at specific intervals, for example with ‘2GB per month for 6 months’, you will receive a new 2GB allowance each month for 6 consecutive months.
The recurring Data Plan is paid in full at the date of the initial purchase for the total duration, you will not be charged the following months.
If you have not finished your allowance, there is no rollover, you will not be able to use it during the next period. To stay connected, you can buy a one-off plan until the next period.
Ubigi provides recurring data plans of 12 months, depending on data plans.