What is Top-ups?

A top-up is extra data added on top of what a plan already includes, usually bought without changing the plan itself. It suits a traveler who underestimated how much scrolling, mapping or tethering a trip needs. Every provider in this group offers top-ups, so the difference is not whether you can add data but how the added data is priced and how long it lasts. A top-up can also be the simplest way to cover a single heavy day abroad rather than buying a wider package for the whole stay. Read the allowance of the top-up alongside the allowance already in your plan, since limits are often counted per billing period or per day rather than per purchase.