Using eSIM · Worldwide
Top up or extend eSIM datahere is how it works
Top up your holySim eSIM from your My eSIM page, with extra data on the same eSIM right away. Plus what other providers offer and what to check first.
Updated 6 min read
In this guide
You top up a holySim eSIM from your My eSIM page: you buy extra data that is on the same eSIM within a few minutes, with no new QR code and nothing to reinstall. Extra data and extra days add to your current bundle. With other providers it depends on the plan; not every eSIM is rechargeable.
Quick advice: keep the email with the button to your My eSIM page and top up while your bundle is still valid. After the end date a top-up is no longer possible; a new bundle is the way forward then.
How to top up your holySim eSIM
The link to your My eSIM page is in your confirmation email and in the delivery email with your QR code. Lost the email? Request a new link with the email address you ordered with.
- Open your My eSIM page through the button in the email.
- Check how much data you have left. The counter can lag a few hours behind your actual usage.
- Pick a top-up and pay online.
- The extra data is on your eSIM within a few minutes. Extra days add to your current validity.
There is nothing to scan and nothing to change in your settings; the eSIM on your phone stays the same. Not every bundle supports top-ups: your My eSIM page only shows them when they are available for your eSIM. If no top-up appears, a new bundle is on your phone within minutes.
You do not need to watch the counter yourself either. We send you a service email when your data is almost gone and when it has run out, so you can top up in time. You can unsubscribe from those emails through the link at the bottom.
What happens when your eSIM data runs out?
With a fixed-data plan, the internet connection stops when the allowance reaches zero. As long as the validity period is still running, you can simply top up a holySim eSIM; the connection returns by itself after the top-up.
Your home SIM does not safely take over by default. When automatic cellular data switching is enabled, the phone may fall back to that line and cause charges outside your domestic allowance. Disable automatic switching and confirm which SIM is selected for data.
No internet does not always mean the allowance is empty. Check coverage, validity, data roaming, and the selected line first. If necessary, follow no internet after eSIM installation.
Top-up, new package, or validity extension
These actions are not the same:
| Action | What changes? | Does the same profile remain? | Main check |
|---|---|---|---|
| Top up | Extra data, with holySim also extra days | Yes | Whether your plan supports top-ups |
| Buy a new package | New data and terms | Sometimes | Whether it attaches to the same eSIM |
| Extend validity | The end date moves | Provider-specific | Whether remaining data carries over |
| Buy a new eSIM | A new profile and plan | No | New installation and line selection |
With holySim, topping up and extending are one action: a top-up adds data and moves the end date. With other providers a top-up may only add data while the original end date stays in place. Read before paying when the extra data activates and what happens to the validity.
Topping up with other providers
Always use the eSIM provider's app, website, or order portal; that counter is authoritative for the package and billing. Look for a button such as Top up, Add data, Recharge, or Renew and confirm the destination, networks, and terms before paying. Airalo, for example, explains in its help center that only rechargeable eSIMs can be topped up. That is provider policy, not a universal eSIM rule.
Never delete an empty eSIM before confirming that it cannot be reused. On iPhone you can view usage per app and per data line; Apple notes that the most accurate current figure comes from your mobile carrier. Android can show plan status and sell added data with supported carriers, but availability varies by carrier and region.
Remaining data, validity, and refunds
Unused data generally expires when the package validity ends. With a holySim top-up the end date moves along, so remaining data from your original bundle stays usable until the new end date. With other providers, a top-up shortly before the end date only makes sense when the added package clearly receives its own validity or carries remaining data forward.
An unused eSIM is not automatically refundable. Digital products may have different refund conditions after delivery, installation, or activation. Check the policy before purchase and, for a technical issue, save screenshots of error messages, profile status, and settings.
Automatic renewal is not standard either. A holySim top-up is always a separate, one-time purchase; no subscription starts. With other providers, check your account for a subscription, stored payment method, or automatic renewal switch.
Avoid running out of data while traveling
- Estimate a realistic allowance with how much data do you need for travel?.
- Keep the email with the button to your My eSIM page; it lets you check your usage on the go.
- Watch for the service email that your data is almost gone and top up right away.
- Download maps, tickets, and hotel details offline.
- Buy more data over trusted Wi-Fi if the connection has already stopped.
Also review data usage per app to identify which activities empty a plan fastest.
Sources and editorial review
The behavior of holySim top-ups was checked against our own order system. The provider-policy examples were checked with Airalo; device usage measurements with Apple and Google. Top-ups, extensions, rollover, refunds, and automatic renewal remain product terms with other providers and can change by package. Last editorial review: August 12, 2026.
Frequently asked questions
Can every eSIM be topped up?
No. You can add data only to profiles for which the provider offers a top-up. With holySim you see it directly on your My eSIM page: if a top-up offer appears, it works for your eSIM. If no offer appears, a new bundle is the way forward.
What happens when my eSIM data runs out?
The connection stops or becomes restricted according to the package terms. With holySim you receive a service email once your data has run out, and you can top up directly from your My eSIM page as long as the bundle is valid. First confirm that the data really is empty; coverage, roaming, or an expired plan can cause the same problem.
Does a top-up also extend the validity period?
With holySim it does: a top-up adds extra data and moves the end date. With other providers that is not a given; a top-up there may add data while the original end date stays in place. Read what happens to the validity before paying.
How can I see how much eSIM data is left?
With holySim your usage is on your My eSIM page; the link is in your confirmation and delivery email. Keep in mind that the counter can lag a few hours. The phone displays measured cellular usage, but its measurement period can differ from your bundle.
Can I get a refund for unused eSIM data?
That depends on the refund policy and the digital product's status. Refunds may be limited after installation or activation. For a technical issue, keep the order details and screenshots, and contact support before deleting the eSIM profile.
