Guernsey · roaming cost calculator
Guernsey eSIM vs Carrier Roaming: Full Cost Breakdown
We earn commissions from some links below. This does not affect the price comparisons or rankings shown on this page. Editorial policy
Airalo, Holafly, and Saily plans for Guernsey
Airalo delivers the Guernsey eSIM as a QR code within seconds of purchase. The plan activates on Sure GG's 4G LTE network the moment you land, with no airport SIM counter required.
Get eSIMHolafly prices by the day, not the gigabyte. In Guernsey on Sure GG's 4G LTE network: if you use under 2GB per trip, a per-GB plan from Airalo or Nomad will cost less.
Get eSIMSaily routes through Sure GG in Guernsey with built-in VPN protection at $3.04/GB. Nord Security's infrastructure backs every plan.
Get eSIMNomad's 30-day refund applies to unused Guernsey eSIMs. Coverage runs on Sure GG's 4G LTE network at $3.04/GB — once the plan is activated, unused data is non-refundable.
Get eSIMCompare providers: Airalo vs Holafly · Airalo vs Saily · Airalo vs Nomad · Holafly vs Saily · Holafly vs Nomad · Saily vs Nomad
The full picture
Published carrier rates for Guernsey travel data
Every major carrier's published Guernsey rate, side by side, with the eSIM winner highlighted.
| Carrier | Plan type | Daily | 7-day | Speed | Data limit |
|---|---|---|---|---|---|
| Vodafone | Roaming Passport | $6.00source | $42.00 | LTE | Fair-use |
| EE | Roam Abroad | $6.00source | $42.00 | LTE | Fair-use |
| AT&T | International Day Pass | $10.00source | $70.00 | LTE | Plan data |
| Verizon | TravelPass | $10.00source | $70.00 | LTE | Plan data |
| eSIM · Airalo | 1 GB · 7 days | — | $3.04 | LTE / 5G | 1 GB |
Compare all carrier roaming plans to see how AT&T, Verizon, T-Mobile, Vodafone, and EE stack up against eSIM providers.
Pay-per-use cost audit
Guernsey data charges on AT&T pay-per-use: real dollar amounts
AT&T's international pay-per-use rate is $2.05/MB in Guernsey. Mixed phone use — maps, messaging, and social media — runs about 60 MB/hour. One hour of that: $123. Four hours of normal use: $492. Eight hours, a full day out: $984. A 30-minute Zoom meeting alone adds $922. A 5-minute video call with family costs $154. These are AT&T's published pay-per-use figures. Source: AT&T international rate card, June 2026.
Personalize your savings
How much will you save with an eSIM in Guernsey?
Adjust your trip length, carrier, and data habits to see your exact savings.
Network coverage
Guernsey LTE and 5G coverage breakdown
Sure runs all cellular service in Guernsey. Verizon TravelPass routes you through Sure at $10/day. A travel eSIM routes through Sure at $3.04/GB. Pull up AT&T's roaming rate card for Guernsey and a travel eSIM plan side by side. The network is Sure in both cases. The price is not. Guernsey does not have 5G on Sure at this time. The peak speed is 4G LTE. Paying AT&T's $10/day roaming rate does not change that. A travel eSIM delivers the same 4G LTE maximum for $3.04/GB.
Pricing breakdown
eSIM plan costs vs carrier charges in Guernsey
Carrier roaming costs for 14 days in Guernsey, ranked: T-Mobile high-speed add-on $210, Verizon TravelPass $140, AT&T International Day Pass $140, eSIM 10GB on Sure GG $30.40. The eSIM option costs 78% less than AT&T.
Per-day data costs in Guernsey: AT&T $10, Verizon $10, T-Mobile $15, eSIM $2.17. The eSIM figure is derived from a $30.40 10GB plan spread across 14 days. Carrier rates are fixed regardless of how much data you use each day.
eSIM plan tiers for Guernsey: 1GB at $5.04 ($5.04/GB), 3GB at $12.69 ($4.23/GB), 5GB at $20.70 ($4.14/GB), 20GB at $60.83 ($3.04/GB).
Trip cost breakdown
Guernsey roaming bill by trip type
If you visit Guernsey for 3 days and need 2GB for maps and messaging: AT&T charges $30 ($10/day x 3 days). A 3GB eSIM on Sure GG costs $12.69. You save $17.31.
If you visit for 14 days with 15GB of photos and video calls: AT&T reaches $140 per person. A 20GB eSIM on Sure GG covers the same stay for $60.83 — $79.17 less, a 57% reduction.
If you stay 30 days and need 50GB for video calls and streaming: AT&T totals $300 over the month. A 50GB eSIM on Sure GG costs $152.03. You save $147.97 (49%). Rates checked June 2026.
Airport options
Airport data options when you land in Guernsey
Hotel WiFi in Guernsey covers basic email but rarely handles navigation or ride-hailing apps at the same time. If you skip the airport SIM counter planning to use hotel WiFi, you may land without data for the taxi from arrivals. A 1GB eSIM at $5.04 is active before you board — maps, ride apps, and messaging all work from the arrivals hall onward.
Data planning
Planning your data usage in Guernsey
WhatsApp video calls use about 250 MB/hour. Five 10-minute video calls per day adds 200 MB to your daily total. Add maps and social media and you reach 1.5 GB per day quickly in Guernsey. A 7-day trip at that rate needs 11GB.
For a 7-day trip, the 20GB plan at $60.83 covers 11GB at $3.04/GB. AT&T's roaming pass for the same 7 days reaches $70.
Connectivity
Guernsey WiFi vs cellular data
Hotel WiFi in Guernsey is unreliable outside of major chains. Many guesthouses and small hotels offer weak or shared connections. An eSIM on Sure GG provides consistent data access regardless of where you stay.
Plan your data
Daily data needs on a Guernsey trip
Hotels in Guernsey charge $10-$20/day for in-room WiFi — and that only covers your room. AT&T roaming adds $10/day for data outside the hotel. A 20GB eSIM on Sure GG at $60.83 covers the full 10 days everywhere, with no daily hotel WiFi fee needed.
Guernsey has one mobile operator: Sure. US carriers pay Sure for roaming access and pass that cost to you at $10/day. An eSIM connects to Sure directly at $3.04/GB — no carrier markup.
Local prices in Guernsey are in GBP (£), but eSIM plans are priced in USD, eliminating exchange rate uncertainty on your data costs.
Quick reference
Guernsey Travel Essentials
999/112
999 and 112 both connect to emergency services in Guernsey. 112 is the EU-standard number and works from any mobile phone, including roaming and eSIM devices, even without a registered local number. Save both before your trip.
Type G
Guernsey uses Type G outlets (UK-style three large rectangular prongs). US plugs do not fit — bring a Type G travel adapter. Most US phone and laptop chargers are dual-voltage (100-240V) and work fine with just the adapter.
GMT/BST (UTC+0/+1)
GBP (£)
Cash in GBP is preferred across most of Guernsey outside major hotels and tourist centers. Card terminals are not common in local markets or small restaurants. Withdraw enough cash at a reliable ATM before leaving the city — rural areas may not have ATM access.
Good to know
Guernsey has one mobile operator: Sure. Both carrier roaming and eSIM connect through this same network — the only difference is price.
Quick tip
Prices in Guernsey are in GBP (£). Buying an eSIM in USD before departure removes the variable of exchange rates affecting your data cost mid-trip.
Step by step
Setting up a Guernsey eSIM in six steps
- On Samsung Galaxy S21 or newer: go to Settings > Connections > SIM manager to verify eSIM support — Pixel 3a and later also qualifies — Sure GG covers LTE in Guernsey
- First-time buyer: Airalo offers Guernsey data at $5.04 for 1GB — create an account, add a payment method, and your QR code arrives in under 60 seconds. Compare eSIM providers to see your options.
- First-time eSIM install: your phone walks you through the QR scan step by step — the profile downloads in 10-30 seconds over a WiFi connection before you leave home so it is ready to activate on arrival
- Returning traveler shortcut: set your home carrier SIM to Data Off in the dual-SIM panel rather than navigating through roaming menus. The full data roaming guide covers all shortcuts.
- Enable the eSIM data line when you land in Guernsey — it connects to Sure GG automatically
- Leave your home SIM enabled for incoming calls: WiFi Calling routes them over the eSIM data connection at no extra cost
Data tips
Guernsey travel data tips: what to turn off and when
Currency converter apps use under 1 MB per session. Bank apps with push notifications use minimal background data. The higher risk is two-factor authentication: your bank may send a code to your home number, which requires cellular reception or call forwarding. Test your bank's 2FA method before traveling to Guernsey.
Regional context
Europe roaming rates and how Guernsey fits in
A few things to know before turning off carrier roaming in Guernsey:
Small island with good coverage
Forgot your eSIM?
You forgot to buy an eSIM for Guernsey — here is what to do
Forgot to buy an eSIM before flying to Guernsey? Three options, ranked by total cost.
Option 1 — Airport WiFi install ($5.04 total): The arrivals area has free WiFi. All four providers (Airalo, Holafly, Saily, Nomad) support post-arrival purchase over WiFi. Buy a 1GB plan for $5.04. No extra charge beyond the plan.
Option 2 — Hotel lobby WiFi install ($5.04 total): If airport WiFi failed, hotel lobby WiFi works just as well. Check in, get the password, complete the eSIM install. Same $5.04 cost.
Option 3 — Emergency carrier download ($10 + $5.04 total): Use ~5 MB of AT&T pay-per-use data to download the provider app ($10). Install the eSIM over the app, then disable carrier data. Total cost: $15.04.
Guernsey FAQ
Guernsey eSIM & roaming questions
How much does carrier roaming cost in Guernsey?
AT&T charges $10/day on International Day Pass for Guernsey. Verizon charges $10/day on TravelPass. T-Mobile includes Guernsey for free at 256 Kbps — barely fast enough for text messages, not usable for maps or apps. Without any plan, AT&T's pay-per-use rate is $2.05/MB, meaning a single Google Maps session costs over $10. A travel eSIM on Sure GG starts at $5.04 for 1GB — the same 4G LTE network at a fraction of the daily roaming cost.
Is T-Mobile's free international data fast enough in Guernsey?
No. 256 Kbps sounds like it covers light use, but even a single email with an attachment or a 30-second map route takes over a minute to load at that speed. T-Mobile's free tier in Guernsey is functional only for plain text messages. The paid upgrade runs $15/day — identical to AT&T's roaming fee. A travel eSIM on Sure GG at $3.04/GB costs less per GB than any day-pass option and has no speed restriction.
How is my roaming bill calculated in Guernsey?
A traveler lands in Guernsey, checks one notification, and AT&T bills $10 for the entire calendar day. That is how per-day billing works — any cellular connection, even a background sync at midnight, triggers the full daily charge. Without a day pass, AT&T charges $2.05/MB. A 15-second Instagram scroll could cost $30. An eSIM at 1GB for $5.04 is a fixed cost: no per-day triggers, no per-MB metering, no bill surprises.
What is the cheapest way to get data in Guernsey?
A travel eSIM at $3.04/GB on Sure GG's 4G LTE network. AT&T roaming costs $10/day. Verizon costs $10/day. T-Mobile's free tier runs at 256 Kbps, which is unusable for navigation or apps. The eSIM beats every carrier option on per-GB cost and provides the same network quality as the paid roaming tiers.
Can I use my Apple Watch cellular in Guernsey with a travel eSIM?
Apple Watch Series 4 and later support eSIM, but international travel eSIM providers do not sell standalone Apple Watch plans. The Apple Watch in Guernsey connects via your iPhone's hotspot — it mirrors the iPhone's data connection. Your iPhone must have an active plan (carrier roaming at $10/day or a travel eSIM at $3.04/GB on Sure GG) for the Watch to function away from WiFi. Apple Watch Cellular uses your watch's built-in eSIM only on your home carrier — AT&T and Verizon charge per watch line at the same daily roaming rate in Guernsey. Rates checked June 2026.
Does EU roaming cover Guernsey for US travelers?
No. EU roaming is a rule for European carrier customers — US carriers (AT&T, Verizon, T-Mobile) are not subject to it. All three US carriers charge their standard international rates in Guernsey: AT&T at $10/day, Verizon at $10/day, T-Mobile free at 256 Kbps. A travel eSIM cuts through the complexity — $3.04/GB on Sure GG's 4G LTE network, no EU policy considerations required.
Is AT&T International Day Pass cheaper than an eSIM for Guernsey?
No. AT&T International Day Pass costs $10/day in all European countries including Guernsey. Over 7 days that is $70. A 5GB eSIM plan costs $20.70 for the same period on Sure GG. The eSIM saves 70% and does not charge you on days when you only use WiFi — unlike the day pass, which triggers the moment any cellular data is used.
Can I use one eSIM across multiple European countries including Guernsey?
Yes. Multi-country European eSIM plans cover the Schengen Area — typically 30+ countries including Guernsey — under a single data bucket. AT&T and Verizon roaming rates are the same in every Schengen country: $10/day per country. A regional eSIM buys you data that works across borders without activating per-country charges. If your itinerary includes Guernsey plus 2-3 neighboring countries, the regional eSIM is cheaper than day passes for every country crossed.
Does GDPR affect the data collected by a travel eSIM in Guernsey?
GDPR governs how companies process personal data, not how your phone uses mobile data. A travel eSIM in Guernsey connects to Sure GG's network — the same infrastructure AT&T and Verizon route roaming through. GDPR does not change connection speeds, pricing, or data limits. Both carrier roaming and travel eSIMs log metadata (connection times, data volumes) as part of standard carrier operations. GDPR applies to the provider's handling of that log data, not to your browsing or usage.
How much does carrier roaming cost for a week in Guernsey?
AT&T: $70/week (International Day Pass at $10/day). Verizon: $70/week (TravelPass). T-Mobile: free at 256 Kbps or $105/week for usable speed. The cheapest eSIM for Guernsey starts at $3.04/GB on Sure GG's 4G LTE network — better per-GB value than all three carriers.
Fact check
Guernsey roaming myths — and what the data actually shows
Roaming charges only apply to data
US carrier international plans charge separately for data, calls, and texts. AT&T's International Day Pass at $12/day includes data but charges $0.25–$1.50/minute for calls beyond the bundled allocation. Incoming voicemail retrieval can trigger per-minute roaming charges even when you make no outgoing calls. A data-only eSIM in Guernsey at $5.04 covers data and uses WhatsApp or FaceTime for voice at no additional carrier cost. Rates checked June 2026.
EU roaming is free for Americans
EU roaming-within-the-EU rules apply only to SIM cards issued by EU-based carriers. AT&T and Verizon are US carriers — they charge full international day pass rates in every EU country. AT&T's International Day Pass runs $12/day in EU destinations. Verizon TravelPass is $10/day. A travel eSIM on Sure GG covers Guernsey for $5.04 total. Rates checked June 2026.
You need to unlock your phone to use an eSIM
eSIM installation does not require an unlocked phone in most cases. iPhones sold in the US since iPhone 14 are sold unlocked by law. iPhones XS through 13 require unlocking to add a foreign carrier eSIM, but AT&T, Verizon, and T-Mobile all offer free unlocking after your contract ends. Samsung Galaxy S20 and newer models support eSIM on both locked and unlocked variants. Check your carrier's unlock policy before your trip to Guernsey.
Our recommendation
Our pick for Guernsey
Airalo covers Guernsey on Sure GG's network with the widest plan selection in the market. A 1GB plan costs $5.04. Regional bundles cover neighboring countries on a single eSIM. The app tracks data usage in real time — helpful for managing a fixed-GB plan. That makes Airalo our pick for Guernsey. Nomad is the budget alternative if per-GB price matters more than app features.
Guernsey eSIM activates in under 5 minutes. No roaming fees.
Carrier day passes add up: 7 days x $6/day = $42. One eSIM plan covers the same trip for $3.04.
Get a Guernsey eSIM