The Guernsey eSIM Matrix by Trip Length: 7, 14 and 30 Days (2026)

A 3-day trip to Guernsey on Sure GG's 4G LTE network needs 1.5GB for a light user (maps and messages only), so the 3GB at $12.69 is enough. A moderate user using social media and navigation needs 4 to 5GB, so go with the 5GB at $20.70. Heavy users streaming or video-calling need 10GB or more; buy the largest fixed plan available. For a typical weekend traveler, the 5GB at $20.70 fits most weekend travelers without overpaying for unused data.

Per-day data cost in Guernsey drops as trip length increases. 7 days: 20GB plan at $60.83 total ($8.69/day). 14 days: 20GB plan at $60.83 total ($4.34/day). 30 days: 20GB fixed plan at $2.03/day. The 14-day bracket balances daily rate and flexibility for most travelers visiting Guernsey.

Running low on data in Guernsey? All five providers offer in-app top-ups that land on the profile already installed. Airalo lets you buy additional data through the app in real time, and the top-up lands on the eSIM profile already installed. Saily and Nomad both support fixed-data top-ups with no reinstallation. A top-up of 1GB costs $5.04, the same as buying a new plan. Buying a larger plan upfront is cheaper per GB than topping up, but the option is always available if you underestimate your usage.

Yes, eSIMs work in Guernsey. The network section on this page lists the local operators for Guernsey; the list does not say which one a phone joins. Samsung Galaxy S22 and later, iPhone XS and later, and Google Pixel 4a and later are all compatible. Make sure your device is unlocked from its original carrier, then scan the QR code before you leave home.

No. Travel eSIM data in Guernsey expires at the end of the plan validity window, and unused gigabytes do not carry over to future trips or additional purchases. Buy a plan that matches your actual trip length, not a larger buffer. The 20 GB Guernsey plan at $60.83 lasts 30 days from activation; data left when it ends does not carry over. If you change plans before installing, HelloRoam refunds an unactivated eSIM for 180 days, the same window Holafly gives unused plans, against 14 days at Airalo.

A Guernsey-specific eSIM only covers Guernsey. For multi-country European trips, HelloRoam sells one Europe plan covering 33 areas, with 7 days of unlimited data at 3GB a day at full speed for $23.53 (catalogue checked 29 Oct 2026). Airalo's Eurolink bundle cost $31 for 10GB over 30 days (read 30 Oct 2026). Each plan covers its own country list. If Guernsey is your only stop, a single-country plan is cheaper: 20GB at $60.83 for a 7-day trip. EU roaming rules do not apply to travel eSIMs because each plan is a standalone purchase.

No, a single-country Guernsey eSIM deactivates outside Guernsey's borders. Plan your data use for the exact days you are in Guernsey. For trips combining Guernsey with other European stops, a regional bundle covers the full itinerary on one purchase. A 20GB plan at $60.83 fits a two-week Guernsey stay, but it stops working the moment you cross the border.

Longer plans in Guernsey cost less per day than shorter ones. A 7-day stay fits the 20GB plan at $60.83 ($8.69/day). A 14-day stay fits the 20GB plan at $60.83 ($4.34/day). Buying one correctly-sized plan costs less than buying two smaller plans back-to-back.

The network section on this page lists the local operators for Guernsey; the list does not say which one a phone joins. The one operator on that list carries a 5G label. A 5G label on that list is a technology label, not a speed. For a full-country itinerary, check the operator list before finalizing your plan.

Estimate 1.5GB per day for typical travel use. Plans for Guernsey start at $5.04 for 1GB. Pick the plan that covers your full trip length so you do not run out mid-stay. If your trip is shorter than the plan window, the remaining days simply expire.