A travel eSIM that will not work is almost always a settings issue, not a fault. Work through this checklist in order: confirm the eSIM is installed and switched on, turn on data roaming for the eSIM, set it as your data line, toggle Airplane mode or restart, manually select a network, and check the APN. These steps fix the large majority of cases. If they don’t, your phone may be carrier-locked, or support can re-issue the profile.
Few things are more stressful than a travel eSIM that won’t connect right after you land. The good news: in almost every case it is a quick setting, not a broken eSIM. Follow these seven steps in order and stop as soon as you are connected.
1. Confirm the eSIM is installed and switched on
An eSIM can be installed but left disabled, especially if you added it before travelling.
Do this: iPhone: Settings → Mobile Data → check the eSIM line is listed and “Turn On This Line” is enabled. Android: Settings → SIM manager → confirm the eSIM is on.
2. Turn on data roaming for the eSIM line
A travel eSIM uses local partner networks, which counts as roaming on that line. This is the single most common fix. It does not cost extra, as your allowance is prepaid.
Do this: select the eSIM line in settings and switch data roaming on. Keep it off on your home SIM so that line never incurs charges.
3. Set the eSIM as your mobile data line
On a dual-SIM phone, data may still be routed through your home SIM.
Do this: iPhone: Settings → Mobile Data → Mobile Data → choose the eSIM line. Android: Settings → SIM manager → Mobile data → select the eSIM.
4. Toggle Airplane mode, then restart
After a flight, the phone often needs to re-scan for networks.
Do this: turn Airplane mode on for 15 seconds, then off. If still nothing, restart the phone, which also applies any setting changes.
5. Manually select a network
Automatic selection sometimes fails to connect to a local partner network, particularly inside airports.
Do this: turn off automatic network selection and choose a network manually. iPhone: Settings → Mobile Data → eSIM line → Network Selection. Android: Settings → Mobile networks → Network operators.
6. Check or enter the APN
If you have a signal but no internet, the APN may need to be entered manually.
Do this: use the APN from your activation email. iPhone: Settings → Mobile Data → eSIM line → Mobile Data Network. Android: Settings → Mobile networks → Access Point Names.
7. Still stuck? Check the lock status and contact support
If every step fails, the phone may be carrier-locked, or the profile may need re-issuing.
Do this: confirm your phone is unlocked with your home network, then contact your provider. WorldSIM support is available 24/7 and can verify your plan and re-issue the eSIM. See the help centre.
Signal but no internet? Start at steps 3 and 6
If the eSIM shows bars but nothing loads, the issue is data routing rather than connection: confirm the eSIM is your data line (step 3) and that the APN is correct (step 6). Our deeper guide on eSIM no signal abroad breaks this down further.
Prevent it next time: set up before you fly
The majority of “not working” cases come from rushed setup. Install the eSIM at home on Wi-Fi, switch the line on, label it clearly, and read the network notes in your activation email. Confirm your phone is eSIM-ready with the compatibility checker, and follow the pre-flight connectivity checklist.
Travelling with WorldSIM? Help is always on WorldSIM provides 24/7 support and eSIMs that work across 100+ countries with calls, SMS and a real number. If anything goes wrong, real people are on hand to fix it. Explore WorldSIM eSIM plans
Key takeaways
- Most eSIM problems are settings, not faults
- Turning on data roaming for the eSIM line is the top fix
- Set the eSIM as your data line on dual-SIM phones
- Restart and manually select a network if it won’t connect
- A carrier-locked phone will reject any eSIM; unlock it first
How WorldSIM travel eSIM with calls, SMS, and data pricing compares to standard PAYG roaming
Once the eSIM is working, cost is usually the next question. Here’s how a dedicated travel eSIM stacks up against roaming on a standard UK PAYG SIM:
WorldSIM eSIM Pro
- Price: £25
- Voice: £0.04/min incoming, £0.34/min outgoing
- SMS: £0.15 per message
- Data: 10GB–85GB bundles (£5–30/GB)
- Coverage: All 195+ countries
EE
- Price: £9 PAYG
- Voice: £1.20/min
- SMS: £0.93
- Data: Separate roaming pass
- Coverage: Incoming only
Vodafone
- Price: £10 PAYG
- Voice: £0.60/min
- SMS: £0.08
- Data: £0.12/MB (2GB–4GB bundles: £17–27)
- Coverage: Incoming only
Lyca
- Price: £10 PAYG
- Voice: £0.80/min
- SMS: £0.48
- Data: 3GB–7GB bundles: £10–20
- Coverage: Incoming only
Three
- Price: £10 PAYG
- Voice: £0.35/min
- SMS: £0.15
- Data: £0.10/MB (6GB inclusive)
- Coverage: Incoming only
Price comparison: data-only eSIM for USA
WorldSIM (USA only)
- Coverage: USA only
- Total price: £14.82
- Data: 20 GB (5G/4G)
- Validity: 30 Days
- Network: AT&T / T-Mobile, Rogers, Telcel
- Voice calls: N/A
- SMS: N/A
- Activation: Instant QR
WorldSIM (North American – Regional)
- Coverage: North American (Regional)
- Total price: £22.16
- Data: 20 GB (5G/4G)
- Validity: 30 Days
- Network: AT&T / T-Mobile, Rogers, Telcel
- Voice calls: 15 mins included
- SMS: 50 SMS included
- Activation: Instant QR
Airalo (USA only)
- Coverage: USA only
- Total price: ~£36.50
- Data: 20 GB (5G/4G)
- Validity: 30 Days
- Network: T-Mobile, Telus, AT&T
- Voice calls: 200 mins
- SMS: 200 SMS
- Activation: Instant QR
Saily (USA only)
- Coverage: USA only
- Total price: £27.07
- Data: 20 GB (4G/5G)
- Validity: 30 Days
- Network: T-Mobile, Rogers, Movistar
- Voice calls: N/A
- SMS: N/A
- Activation: Instant QR
Holafly (USA only)
- Coverage: USA only
- Total price: £60.00
- Data: Unlimited (FUP cap)
- Validity: 30 Days
- Network: AT&T, Bell, Telcel
- Voice calls: N/A
- SMS: N/A
- Activation: Instant QR
Nomad (USA only)
- Coverage: USA only
- Total price: £22.68
- Data: 20 GB
- Validity: 30 Days
- Network: T-Mobile, Rogers, AT&T
- Voice calls: N/A
- SMS: N/A
- Activation: Instant QR
Travelling with WorldSIM? Help is always on
WorldSIM provides 24/7 support and eSIMs that work across 100+ countries with calls, SMS and a real number. If anything goes wrong, real people are on hand to fix it. Explore WorldSIM eSIM plans
Frequently asked questions
Q: Why is my travel eSIM not working?
A: Usually data roaming is off on the eSIM line, the eSIM is not set as the data line, the network has not been selected, or the APN is not configured. Less often the phone is locked to another carrier, or the eSIM was installed but not switched on. A settings checklist fixes most cases.
Q: How do I reset my eSIM if nothing works?
A: First restart the phone, which resolves many issues. If it still fails, you can usually delete and reinstall the eSIM profile, but only if your provider can re-issue the QR code, since some eSIMs install once. Contact support before deleting so you don’t lose the profile.
Q: Can I fix an eSIM that was installed but never activated?
A: Yes. Many travel eSIMs activate when they first connect to a network in the destination, so they can look inactive until you arrive. Ensure the line is on, data roaming is enabled, and you are in coverage. If it still won’t activate, your provider can confirm status and activate it.
Q: Does my phone being locked stop an eSIM working?
A: Yes. A phone locked to another carrier will reject a travel eSIM even if installed correctly. It must be carrier-unlocked to use any third-party SIM or eSIM. Your home network can confirm lock status and unlock it, often for free.
Q: Who do I contact if my WorldSIM eSIM will not connect?
A: If you have worked through the checklist and it still won’t connect, WorldSIM offers 24/7 support to diagnose the issue, confirm plan status, and re-issue the eSIM if needed. Have your order details and phone model ready to speed things up.
Q: Can a WorldSIM eSIM Pro receive OTPs from banks and government sites?
Yes. WorldSIM’s eSIM Pro is SMS-enabled and receives one-time passwords from UK banks (Barclays, Monzo, HSBC), HMRC, PayPal, Apple, and Google in 195+ countries, just like a physical SIM.
