eSIM Questions, Answered

An eSIM (embedded SIM) is a programmable chip built directly into your device's hardware. Unlike a physical SIM card that you insert and remove, an eSIM is permanently soldered to the device's circuit board. You activate it by downloading a carrier profile remotely — typically by scanning a QR code. The result is the same: your device connects to a mobile network. The difference is purely in how the carrier information is delivered and stored.

Yes, an internet connection is required to download the eSIM profile. This is typically done over Wi-Fi before you travel. Once the profile is downloaded and installed, the eSIM works independently of Wi-Fi — it connects to mobile networks just like a physical SIM. We strongly recommend activating your eSIM at home before departure, rather than trying to do it at the airport.

The technical activation process — scanning the QR code and downloading the profile — typically takes 1–3 minutes on a standard broadband connection. Some providers process the order instantly; others may take up to 24 hours to issue the QR code after purchase. Factor this into your planning and purchase your eSIM at least a day before you travel.

Technically yes, if you have a Wi-Fi connection. Airport Wi-Fi can be used for activation, though it's less reliable than home broadband. In-flight Wi-Fi is generally not suitable for eSIM activation due to connection instability and speed limitations. The best practice is to activate at home before your journey.

If the QR code scan fails, first ensure you're in good lighting and the code is fully visible on screen. Don't screenshot and scan the screenshot — scan the original code directly. Most providers also offer a manual activation code (SM-DP+ address and activation code) as an alternative. Contact your provider's support if neither method works.

On iPhone: Settings → General → About → look for "Available SIM" or an EID number. On Android: Settings → Network → SIM card manager → look for an "Add eSIM" or "Add mobile plan" option. If you see these options, your device supports eSIM. You can also check our device compatibility guide for a full list of supported models.

Yes. A carrier-locked phone will only accept eSIM profiles from the locking carrier. If your phone is locked, contact your carrier to request an unlock before traveling. Most carriers will unlock devices for free after the contract period, and many will do so immediately upon request for international travel purposes.

Yes, this is one of eSIM's most valuable features for travelers. Most modern smartphones support Dual SIM — you can have your home SIM (physical or eSIM) active for calls and texts while using a travel eSIM for data. Configure your settings so the travel eSIM handles data and your home SIM handles calls. Your home number remains reachable throughout your trip.

Storage capacity varies by device. Most Android phones can store 5–10 eSIM profiles. iPhones running iOS 16 or later can store up to 8 active eSIMs. Older iPhones (iOS 15 and earlier) can store multiple profiles but only activate one at a time alongside a physical SIM. You can delete old profiles to free up space for new ones.

Regional European eSIM plans are specifically designed for multi-country travel. They typically cover 30–50 European countries and automatically roam to the best available network in each country. Check the coverage list of your specific plan before purchasing to confirm all your destinations are included.

Yes. Regional eSIM plans work seamlessly on cross-border train journeys. Your device automatically connects to available networks in each country as you cross borders. There may be brief moments of no signal in tunnels or remote areas, but connectivity generally resumes quickly. Major European rail corridors are well-served.

When you exhaust your data allowance, most plans either stop data access entirely or throttle speeds to a very low rate (typically 128–256 kbps). You can usually purchase additional data through the provider's app or website. Some plans offer automatic top-up options. Monitor your usage through the provider's app to avoid unexpected cutoffs.

Most travel eSIM plans are data-only and do not include a local phone number for traditional calls. However, you can make calls using VoIP apps (WhatsApp, FaceTime, Zoom, Google Meet) over the data connection. For traditional calls, keep your home SIM active in Dual SIM mode — your home number remains reachable and you can call out using your home plan's international rates.

Yes. eSIM connections are as secure as physical SIM connections — both use the same cellular encryption standards. For banking two-factor authentication via SMS, ensure your home SIM (with your registered number) is active in Dual SIM mode, as SMS codes are tied to your home number, not the travel eSIM.

First, confirm the eSIM is set as the active data line in Settings → Cellular. Toggle Airplane Mode on for 30 seconds, then off. If still no service, go to Settings → Cellular → select your eSIM → Network Selection → disable Automatic and manually select an available network. If the issue persists, restart your device.

Software updates occasionally deactivate eSIM profiles. Check Settings → Cellular — the profile is likely still stored but inactive. Re-enable it from the SIM management menu. If the profile is genuinely missing, contact your eSIM provider with your order number to request a re-issue of the QR code.

eSIM profiles are typically locked to the device they're installed on for security reasons. You cannot directly transfer an eSIM profile between devices. If you get a new phone, you'll need to contact your eSIM provider to request a new QR code for the new device. Some providers allow this for free; others charge a small fee.

Slow speeds can result from: (1) exceeding your high-speed data allowance and being throttled, (2) network congestion in busy areas, (3) being in a low-coverage area, or (4) your device connecting to a slower 3G network instead of 4G. Check your data usage, try manually selecting a different network, and ensure your device's preferred network type is set to 4G/LTE or 5G.

Once deleted, an eSIM profile cannot be recovered from the device. However, most providers can re-issue a new QR code for the same plan. Contact your provider's customer support with your order details. Note that some providers charge a small fee for re-issuance, and there may be a waiting period.

For a typical tourist using maps, messaging, social media, and occasional streaming, 5–10GB is usually sufficient for two weeks. If you're a digital nomad using video calls and cloud services, budget 15–30GB. When in doubt, choose a plan with slightly more data than you think you need — running out mid-trip is more disruptive than having leftover data.

In most cases, "unlimited" plans include a high-speed data allowance (e.g., 20–50GB) after which speeds are throttled to a slower rate (typically 1–5 Mbps). This is sufficient for basic browsing and messaging but may be frustrating for video streaming or large file transfers. Always read the plan's fair use policy carefully.

This varies by provider. Some plans start counting validity from the moment of purchase, others from the moment of installation, and others from first use. Plans that count from first use offer the most flexibility for travelers who purchase in advance. Check your specific plan's terms — this information is usually clearly stated in the plan description.