You can buy one-off or recurring data plans from eSIM mobile service providers such as Ubigi.
A one-off data plan is a data plan that you buy for a one-time use. A recurring data plan is a mobile plan with a data allowance that is automatically renewed on a monthly basis. Ubigi proposes 12 months validity-period recurring data plans.
You will also pay upfront if you buy a recurring data plan, like a one-off data plan. You will not be billed monthly but at the date of the initial purchase for the total duration.
Ubigi povides recurring data plans for 12 months, depending on data plans.