Reference

Frequently Asked Questions

Structured answers to common questions about eSIM technology and European travel connectivity.

Basics

What is an eSIM?

An eSIM (embedded SIM) is a digital SIM card built into your device's hardware. Unlike a traditional physical SIM card, it cannot be removed. The carrier profile (the data that connects you to a network) is downloaded digitally via a QR code. eSIM is standardized by the GSMA and supported by most modern smartphones from 2018 onward.

Is eSIM better than a physical SIM for travel?

For most travelers, yes. eSIM allows you to purchase and activate a plan before you arrive, avoiding the need to find a phone shop in an unfamiliar country. Regional European plans cover 30+ countries, eliminating the need to buy new SIMs at each destination. The main limitation is device compatibility — older phones don't support eSIM.

How is eSIM different from roaming?

Traditional roaming means using your home carrier's service abroad, which is billed at roaming rates (often expensive). An eSIM travel plan is a separate plan specifically designed for international use, typically offering much better value. Within the EU, EU roaming regulations cap what carriers can charge, but eSIM plans are still often cheaper and offer more data.

Activation

How do I install an eSIM?

Purchase a plan from an eSIM provider. You'll receive a QR code by email. On iPhone: Settings → Cellular → Add Cellular Plan → scan QR code. On Samsung: Settings → Connections → SIM card manager → Add mobile plan → scan QR code. The download takes 1–3 minutes over Wi-Fi.

Does my phone need to be unlocked?

Yes. A carrier-locked phone will only accept eSIM profiles from the locking carrier. Contact your carrier to request an unlock. Most carriers do this free of charge after the contract period ends. Some will unlock immediately for international travel purposes.

Can I install an eSIM before I travel?

Yes, and this is recommended. Install the profile at home using your Wi-Fi connection. Activate it when you arrive at your destination. This means you step off the plane with data already available — no need to find connectivity to download the profile.

Devices

Which iPhones support eSIM?

All iPhones from the XS (2018) onward support eSIM. This includes: iPhone XS, XR, 11 series, SE (2nd and 3rd gen), 12 series, 13 series, 14 series, 15 series, and 16 series. See our full device guide for details.

Which Samsung phones support eSIM?

Samsung Galaxy S20 and later flagship models support eSIM. The Z Fold and Z Flip foldable series also support eSIM. Some Galaxy A series mid-range phones (A54, A34) support eSIM. Carrier-locked variants may have eSIM disabled.

Plans & Data

How much data do I need for a 2-week European trip?

For typical tourist use (maps, messaging, social media, occasional streaming): 5–10GB for 2 weeks. For heavier use including video calls and streaming: 15–20GB. When in doubt, choose more data than you think you need — unused data is less costly than running out mid-trip.

Can I use my eSIM as a hotspot?

Most eSIM plans support mobile hotspot/tethering. Some plans restrict hotspot usage or count it against a separate allowance. Check the plan's terms and conditions before purchasing if hotspot is important to you.

When does my plan's validity start?

This varies by provider. Some plans start from purchase date, others from installation, others from first use. Plans that start from first use offer the most flexibility for travelers who purchase in advance. Check the plan description carefully.

Travel Use

Will my eSIM work in all EU countries?

Regional European eSIM plans typically cover 30–50 countries. Always verify the coverage list of your specific plan. Note that Switzerland, Norway, and the UK are not EU members and may not be included in all "European" plans.

Can I keep my home number while using a travel eSIM?

Yes. Use Dual SIM: keep your home physical SIM for calls and texts (your number remains reachable), and use the travel eSIM for data. Configure in Settings → Cellular: set the travel eSIM as the data SIM and your home SIM as the default for calls.

Troubleshooting

No signal after arriving in a new country

Toggle Airplane Mode on for 30 seconds, then off. This forces the device to search for available networks. If still no signal, go to Settings → Cellular → Network Selection and switch from Automatic to Manual, then select an available network.

eSIM profile disappeared after phone update

Check Settings → Cellular — the profile is likely still stored but deactivated. Re-enable it from the SIM management menu. If the profile is genuinely gone, contact your provider with your order number to request a new QR code.

Can I transfer an eSIM to a new phone?

eSIM profiles are bound to specific device hardware and cannot be directly transferred. Contact your provider to request a new QR code for your new device. Some providers allow this for free; others charge a small re-issuance fee.