Everything you need to know about eSIM technology for European travel, answered clearly and without jargon.
eSIM Basics
An eSIM (embedded SIM) is a digital SIM card permanently built into your smartphone or tablet. Unlike a physical SIM card, it cannot be removed. Instead, mobile plans are downloaded and activated digitally, usually by scanning a QR code. This allows you to switch carriers and activate travel plans without physically handling a SIM card.
A physical SIM card is a removable chip that stores your subscriber information. An eSIM performs the same function but is embedded in your device's hardware and programmed digitally. The key practical difference for travelers is that you can purchase and activate an eSIM plan online before you travel, without needing to physically swap cards at your destination.
Yes. eSIM technology uses the same security standards as physical SIM cards, with additional encryption layers for the remote provisioning process. The GSMA's eSIM specification mandates strong authentication and data protection. Your eSIM profile is tied to your specific device and cannot be cloned or transferred without authorization.
Yes. Most smartphones can store multiple eSIM profiles simultaneously. However, typically only one eSIM can be active at a time (though some newer devices support two active eSIMs). You can store your home carrier's eSIM and a travel eSIM on the same device and switch between them as needed.
Activation
After purchasing an eSIM plan, you receive a QR code by email. On iPhone: Settings → Cellular → Add eSIM → scan QR code. On Samsung: Settings → Connections → SIM Manager → Add Mobile Plan → scan QR code. On Pixel: Settings → Network & Internet → SIMs → Add SIM → scan QR code. The profile downloads and installs automatically.
No. You can install and activate most eSIM profiles before you travel, from anywhere in the world. We recommend installing the profile at home while on Wi-Fi. Some plans allow you to set a specific activation date so the data validity period doesn't start until you actually arrive.
Ensure you are scanning the QR code from a different screen (e.g., display it on a computer and scan with your phone). The QR code must be scanned through your phone's SIM settings, not through a third-party QR scanner app. Ensure you have an internet connection during scanning. If the problem persists, contact your eSIM provider's support team.
No. Most eSIM QR codes are single-use. Once scanned and installed, the QR code becomes invalid. If you delete the eSIM profile from your device and need to reinstall it, you will need to request a new QR code from your provider. This is why it's important not to delete an eSIM profile unless necessary.
Device Compatibility
On iPhone: Settings → General → About. Look for an "EID" number — if present, your device supports eSIM. On Android: Settings → About Phone → SIM Status. You can also check your manufacturer's website or our Device Compatibility Guide.
Yes, for most travel eSIM plans. A carrier-locked phone will only accept eSIM profiles from the carrier it's locked to. Contact your home carrier to request an unlock before traveling. Most carriers unlock phones after the contract period ends, often at no charge.
Yes, many tablets support eSIM. Cellular models of iPad Pro (2018+), iPad Air (3rd gen+), iPad Mini (5th gen+), Samsung Galaxy Tab S8+, and Microsoft Surface Pro 9 (5G) all support eSIM. Wi-Fi-only tablet models do not support eSIM.
Travel & Connectivity
Yes. Most eSIM-capable phones support Dual SIM operation. You can keep your home SIM active for calls and texts while using the eSIM for data in Europe. In your phone settings, you can designate which SIM handles calls, texts, and data independently.
For typical leisure use (navigation, messaging, social media, occasional video calls), 10–15 GB is usually sufficient for two weeks. Remote workers using video conferencing should consider 20–30 GB. Heavy streamers or those using their phone as a hotspot for a laptop should consider an unlimited plan.
Yes, if your eSIM plan covers both countries. Multi-country European eSIM plans are designed for exactly this purpose. Your phone will automatically switch to the local network when you cross a border. There may be a brief moment of network searching, but connectivity resumes automatically.
Most eSIM plans allow hotspot/tethering, but check your specific plan's terms. Some budget plans restrict hotspot usage or throttle hotspot speeds. If you plan to use your phone as a hotspot for a laptop, choose a plan that explicitly supports tethering and has sufficient data.
When your data allowance is exhausted, your data connection stops (or is heavily throttled, depending on the plan). Most providers allow you to top up or purchase additional data through their app or website. Some plans automatically offer a top-up option. You can also purchase a new eSIM plan if your current one has expired.
Troubleshooting
First, ensure the eSIM is set as your active data SIM in settings. Enable data roaming for the eSIM. Toggle airplane mode on and off to force a network re-registration. Try manually selecting a network operator. Restart your device. If still not working, contact your eSIM provider's support team.
Slow speeds can result from: being in a rural area with weaker signal, your plan only including 3G data, your data allowance being exhausted (some plans throttle rather than cut off), or network congestion in busy tourist areas. Check your plan details and current data usage in your provider's app.
Contact your eSIM provider immediately. Many providers can issue a new QR code for the same plan, though policies vary. Some providers charge a fee for reissuing. This is why it's important to never delete an eSIM profile unless you're certain you no longer need it.
eSIM profiles are tied to the device they were installed on and cannot be directly transferred. However, many providers allow you to request a new QR code for a new device, effectively moving your plan. Contact your provider before switching phones to understand their transfer policy.
Verify that the country you're in is included in your eSIM plan's coverage list. Some plans exclude certain countries or have limited coverage in specific regions. Also check that data roaming is enabled. Try manually selecting a network operator in your phone's network settings.
Additional Questions
Cellular Apple Watch models support eSIM, but the eSIM on an Apple Watch is typically paired with your iPhone's carrier plan, not a separate travel eSIM. Travel eSIM plans are generally designed for smartphones and tablets, not wearables.
iSIM (integrated SIM) is the next evolution of eSIM technology, where the SIM functionality is integrated directly into the device's main processor chip rather than being a separate embedded component. For travelers, the practical experience is identical — both use the same QR code activation process and support the same plans.
Most travel eSIM plans for Europe are data-only plans. They do not include a local phone number, voice calls, or SMS. For calls and texts, you would use your home SIM (in Dual SIM mode) or use internet-based services like WhatsApp, FaceTime, or Signal over your eSIM data connection.
Still Have Questions?
Our editorial team is here to help. Read our comprehensive guide or get in touch directly.