Technical and practical answers to the most common eSIM questions.
An eSIM is an embedded SIM chip permanently soldered into your device. Unlike a physical SIM card, it can be reprogrammed remotely via a QR code, allowing you to switch between mobile operators without handling any physical hardware.
Yes. eSIM is standardized by the GSMA under the SGP.22 specification for consumer devices. This means any GSMA-compliant eSIM profile will work on any GSMA-compliant device, regardless of manufacturer.
On iPhone: Settings → General → About → look for EID number. On Android: Settings → About Phone → look for EID. Alternatively, check your device manufacturer's specifications page for your exact model number.
No. A carrier-locked device can only use eSIM profiles from that specific carrier. Contact your carrier to request an unlock, which is typically available after your contract period ends.
The QR code scanning and profile download typically takes 1–3 minutes on a good Wi-Fi connection. The entire process from purchase to active connection is usually under 5 minutes.
No. An internet connection is required to download the eSIM profile from the provider's SM-DP+ server. Activate on home Wi-Fi before traveling for best results.
Most devices can store 5–20 eSIM profiles, though only one or two can be active simultaneously. You can switch between stored profiles in your device's cellular settings.
Yes. eSIM is network-technology agnostic and works with 2G, 3G, 4G LTE, and 5G NR. Whether you connect to 5G depends on your device's hardware and the network's 5G availability in your location.
Pan-European eSIM plans typically cover all 27 EU member states. Always verify the specific coverage map of your plan. Non-EU European countries (Switzerland, Norway, UK) require explicit plan coverage.
Most travel eSIM plans are data-only. Use VoIP apps (WhatsApp, FaceTime, Skype) for calls over your data connection. Your home SIM remains active for traditional voice calls.
Depending on the plan, your connection either stops or throttles to a reduced speed. Most providers offer data top-ups via their app or website. Monitor usage through your device's built-in data tracking.
Yes, in several respects. eSIM profiles are stored in a tamper-resistant secure element and cannot be physically stolen or cloned. The provisioning process uses end-to-end encryption and mutual authentication.
eSIM profiles are typically device-locked for security. If you upgrade your phone, contact your provider to request a new profile for the new device. Some providers allow this free of charge.
Yes. Factory resets erase all eSIM profiles. Before resetting, note your provider details. Contact them afterward to request a new QR code for reinstallation.
Most travel eSIM plans include hotspot/tethering. Verify before purchasing. Hotspot usage consumes data from your plan's allowance at the same rate as direct device usage.
At sea, ships use maritime satellite networks. Your eSIM won't work on the open ocean. In port or near shore, you can connect to local land-based networks.
eSIM is a separate chip on the device's circuit board. iSIM integrates SIM functionality directly into the main application processor. Both use the same GSMA provisioning standards and are functionally equivalent for users.
Most devices can only have one eSIM plan active at a time for data. Some newer devices support dual active eSIM, allowing simultaneous use of two plans. Check your device specifications.
Ensure the eSIM is set as active data line. Toggle airplane mode. Try manual network selection. Restart device. If the issue persists, contact your provider — they can often resolve activation issues remotely.
Screenshot the QR code and save it to cloud storage (iCloud, Google Drive) before scanning. This ensures you can reinstall the profile if needed after a factory reset or device change.