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eSIM Top-Ups Explained: More Data Without a New QR Code
An eSIM top-up adds a new data package to an eSIM the customer already installed, so they don't need a new QR code or a second eSIM. For resellers, top-ups are the easiest repeat revenue: the customer is already yours and needs data now. On Fully Signal, partners top up from the panel or with one API call, on plans that support top-ups.
In this article
A traveller is on day five of a ten-day trip and their data is nearly gone. They can buy a brand-new eSIM from anyone — or top up the one they already have, from you. Top-ups are where good eSIM businesses earn their repeat revenue.
What an eSIM top-up is
A top-up (or recharge) adds a new package to an existing eSIM. The customer keeps the same eSIM line on their phone: no new QR code, no new installation, no settings to change. The extra data simply becomes available.
Why top-ups matter
| For the traveller | For the reseller |
|---|---|
| No second installation | Revenue with no acquisition cost |
| Keeps the same line and settings | The customer stays with you |
| Fast — seconds, not minutes | Higher lifetime value per traveller |
A reseller who makes top-ups easy earns more from every customer than one who only sells first eSIMs. How much can you earn?
Which plans can be topped up
Not every plan supports top-ups — some low-cost regional promotions, for example, are sold as fixed 30-day plans without them. In the Fully Signal catalogue, each package shows whether it can be topped up, and the top-up options for an eSIM are listed for that eSIM.
How to sell top-ups
- Tell customers it's possible — in the install email and on your site
- Make it one click — a "Need more data?" link in your app or emails
- Time it — send a reminder when the plan is likely to run low or near its end
- Price for convenience — fairly, but above your first-purchase margin is common (pricing)
Top-ups on Fully Signal
- Partner panel: open the eSIM, choose a top-up package, confirm
- API: one call
POST /api/v1/esims/{iccid}/topup
{ "package_id": "…" }- History:
GET /api/v1/esims/{iccid}/topupslists every top-up on that eSIM - Status and remaining data:
GET /api/v1/esims/{iccid}
Top-ups are paid from your prepaid balance, like orders.
FAQ
What is an eSIM top-up?
Adding more data to an eSIM that's already installed, without a new QR code or installation.
Do all eSIMs support top-ups?
No. Some plans are fixed and can't be topped up. Check the package details before you sell it for a long trip.
Can top-ups be refunded?
Top-ups can't be refunded automatically on Fully Signal; contact support if something went wrong.
Does a top-up extend the validity?
It depends on the package: a top-up adds a package with its own data and validity. Check the top-up package details.
