Free tool to diagnose an eSIM that will not connect (any brand)

You land, turn off airplane mode, and nothing. No bars, no data, just a spinning icon. In most cases the eSIM profile is fine and one toggle is in the wrong position.

That is why we built eSIM Rescue, a free diagnostic tool at voasim.com/sos/. It works with an eSIM from any provider, not only VoaSim, and it asks the same questions a good support agent would ask, in order.

What the free eSIM diagnostic tool checks

The tool goes through the settings that cause the vast majority of "eSIM not connecting" reports, one at a time, with instructions for your phone:

• Data roaming on the eSIM line. A travel eSIM connects to a partner network at your destination, so roaming has to be ON for that line. This is the single most common cause.
• Line enabled. The profile is installed but the line itself is switched off, or it was labelled and forgotten.
• Network selection. The phone is stuck on automatic search or locked to a network that rejects the profile. Manual selection usually fixes it.
• APN. Some Android models need the access point name typed in or reset.
• Data SIM setting. Cellular data is still pointed at your home SIM, so nothing goes through the eSIM.

It also reminds you to turn off data roaming on your home line, so you do not get a surprise bill from your usual carrier while the travel eSIM does the work.

How to use it in about two minutes

You do not need an account, an app or a purchase.

1. Open voasim.com/sos/ on any device with internet — hotel Wi-Fi, a laptop, or a friend's phone.
2. Pick your phone type (iPhone or Android) and describe the symptom: no signal at all, signal but no data, or the profile will not install.
3. Follow the steps in order and do not skip. Each step tells you exactly where to tap.
4. After each change, toggle airplane mode on and off for 30 seconds and check again.
5. If you still have nothing after the last step, the tool tells you what to send to support so nobody wastes time.

Doing this before you contact anyone usually saves the conversation entirely. If you are still on the fence about buying, our price simulator shows the exact cost for your dates in a minute.

The most common causes, by phone brand

Not sure your phone supports eSIM at all? Dial *#06#. If an EID appears, it does. Carrier-locked phones must be unlocked first.

Prevention: what to do before you fly

Most rescue cases are avoidable. With a VoaSim eSIM the QR code arrives by email within minutes of payment, and the rule is simple: install at home, activate on landing.

• Install the profile on stable Wi-Fi before the flight, with time to spare.
• Keep the travel line switched off until you land. On Android, do not turn on the eSIM's mobile data before the trip.
• Your validity days start at the eSIM's first connection to a network at the destination, not at purchase.
• Turn off data roaming on your home carrier line. Your physical SIM and number stay in the phone, so WhatsApp keeps working on your number over the eSIM's data.

Also worth knowing before you travel: VoaSim eSIMs are data only, hotspot and tethering are not allowed, and they work on land at cruise ports but not at sea. See the travel guides for the full install walkthrough.

When the tool is not enough: human support and the refund rule

Some problems are not settings. A profile can fail to install because the phone is carrier-locked, because the QR code was already used on another device, or because of a rare network issue at the destination.

In those cases, message us at hola@voasim.com or use the chat on the site. Real people answer. Send the diagnostic summary the tool gives you, your phone model, the destination and a screenshot of the network settings screen — that usually cuts the back-and-forth to one exchange.

Our rule is straightforward: if a VoaSim eSIM will not connect and support cannot fix it, you get a 100% refund. You can read more about how we operate on our trust page. If your eSIM is from another brand, the diagnostic tool is still free to use, but the refund and the ticket go through that provider's own support.

If you decide to switch plans while you are there

Sometimes the eSIM connects fine but the plan is the problem: the GB ran out on day three, or speeds dropped after a cap. VoaSim sells truly unlimited data — no cap, no throttling, no hidden fair-use clause — at one price per duration, the same for every one of our 170 destinations.

Trips of 1–4 days pay the 5-day package; the maximum is 90 days per eSIM. A second eSIM in the same order gets 10% extra off. The Europe plan covers 39 countries with a single eSIM. Note that we do not currently cover the island Caribbean.

FAQ