Data packs aren’t time-based: use the data until it runs out, and it never expires. If you take a break from using international routes, any unused data remains available for later. This differs from monthly plans, which reset on your activation date. Consider how regularly you’ll use the service before choosing.
If you use the service regularly, start by comparing monthly plans. If your usage is more occasional, look at data packs. Don’t decide based on total allowance alone, and don’t mistake “never expires” for unlimited data. Video streaming, file transfers, and background updates all use data.
To check how an existing plan relates to a new order, review your current subscription in the user panel and contact support by ticket. Don’t assume allowances from different plans can be combined or exchanged, or that an upgrade converts them at a fixed rate.