Savings Calculator
Guernsey eSIM Savings Calculator: Roaming vs eSIM (2026)
AT&T charges $10/day in Guernsey. Verizon charges the same. Over 10 days, that bill reaches $100. A travel eSIM on Sure GG's 4G LTE network costs $60.83 — 39% less. Here is the full breakdown.
Your carrier's roaming rate in Guernsey
| Carrier | Plan | Daily Rate | 7-Day Cost |
|---|---|---|---|
| Vodafone | Roaming Passport | £6/day | £42 |
| EE | Roam Abroad | £6/day | £42 |
| AT&T | International Day Pass | $10/day | $70 |
| Verizon | TravelPass | $10/day | $70 |
Vodafone Roaming Passport
Vodafone pays Sure GG for roaming access in Guernsey and bills you £6/day. A travel eSIM connects to Sure GG directly at $3.04/GB — same towers, no markup.
EE Roam Abroad
Voicemail retrieval on EE in Guernsey is treated as an inbound call and can trigger the £6/day roaming pass on a day you hadn't planned to use data. Divert voicemail to a free app before departure.
AT&T International Day Pass
AT&T's $10/day pass in Guernsey draws from your existing home-plan data bucket. Customers on base-tier plans with 5GB/month find they exhaust home data faster when roaming counts against the same pool.
Verizon TravelPass
Sure GG operates the 4G LTE towers in Guernsey. Verizon resells access at $10/day. An eSIM accesses Sure GG directly from $3.04/GB.
eSIM alternative cost for Guernsey
Plan tiers for Guernsey
| Tier | Price | Per GB |
|---|---|---|
| 1GB | $5.04 | $5.04 |
| 3GB | $12.69 | $4.23 |
| 5GB | $20.70 | $4.14 |
| 20GBBest fit | $60.83 | $3.04 |
Which provider covers Guernsey
The primary provider for Guernsey is Airalo, connecting to Sure GG's 4G LTE network. Compare all eSIM providers
Savings breakdown
| Trip Length | AT&T | Verizon | T-Mobile HS | eSIM | You Save |
|---|---|---|---|---|---|
| 3 days | $30 | $30 | $45 | $20.70 | $9.30 (31%) |
| 7 days | $70 | $70 | $105 | $60.83 | $9.17 (13%) |
| 14 days | $140 | $140 | $210 | $60.83 | $79.17 (57%) |
| 21 days | $210 | $210 | $315 | $60.83 | $149.17 (71%) |
| 30 days | $300 | $300 | $450 | $60.83 | $239.17 (80%) |
Family and group savings
Carrier roaming charges multiply per person. eSIM savings multiply even faster for groups.
Solo traveler
Carrier: $100
eSIM: $60.83
Save $39.17
Couple
Carrier: $200
eSIM: $121.66
Save $78.34
Family of 4
Carrier: $400
eSIM: $243.32
Save $156.68
Trip length calculator
How much data you need
Maps & navigation
50 MB/hr
Social media
80 MB/hr
Video calls
250 MB/hr
Photo uploads
10 MB/photo
Music streaming
70 MB/hr
Web browsing
60 MB/hr
Real savings scenarios for Guernsey
Solo traveler
T-Mobile advertises free data in Guernsey, but it runs at 256 Kbps. The high-speed upgrade costs $15/day, reaching $150 over 10 days. A 20GB eSIM on Sure GG delivers full 4G LTE for $60.83. The gap: $89.17 (59%). T-Mobile's free tier is usable only for plain text messages.
Family trip
Two travelers on Verizon in Guernsey for 10 days: 2 lines x $10/day x 10 = $200. Two 20GB eSIMs: $121.66. Savings: $78.34 for the couple. If only one person needs heavy data, one eSIM with tethering costs $60.83 total and covers both devices through the phone's hotspot feature.
Business trip
Day 1 in Guernsey: AT&T charges $10 the moment you turn on your phone at the airport. Day 2: another $10 triggered by a background sync at 6 AM. Day 3: $10 more, totaling $30 for a 3-day trip. A 20GB eSIM costs $60.83 for all three days combined. For a team of three: AT&T total $150 vs eSIM total $182.49. Savings: $-32.49.
Long-stay and digital nomads
A weekend (3-day) trip to Guernsey: AT&T roaming costs $30. An eSIM costs roughly $20.70. Savings: $9.30. A 14-day trip: AT&T costs $140. eSIM costs $63.84. Savings: $76.16. Carrier roaming adds $10 for every extra day. An eSIM plan covers a fixed period regardless of daily charges. The break-even point is day one in Guernsey.
Frequent traveler annual savings
Annual eSIM savings for 4 trips to Guernsey: $156.68. That covers 0 round-trip Uber rides, 3 museum admissions, or 10 meals in Guernsey. The data connection is identical on Sure GG; the savings go toward experiences.
Extended stay economics
Two weeks in Guernsey on AT&T International Day Pass: $10/day x 14 = $140. Verizon TravelPass: $140. T-Mobile high-speed add-on: $210. A 20GB eSIM on Sure GG covers the same 14 days for $63.84. That is $76.16 less than AT&T (54% savings). The per-day cost of the eSIM works out to $4.56/day vs AT&T's fixed $10/day.
Frequent flyer savings
Over a 10-year travel horizon visiting Guernsey twice annually: AT&T total: $2000. eSIM total: $1216.60. Decade savings: $783.40. That is $783.40 kept in your account for the same Sure GG 4G LTE connection on every trip.
Data usage savings
Light data users — email, messaging, occasional maps — use 300-500 MB/day in Guernsey. Over 10 days: 4.0 GB total. AT&T still charges the full $10/day regardless: $100. An eSIM at $3.04/GB for 4.0 GB costs $12.16. Light users overpay the most on carrier day passes — the fixed fee exceeds their actual consumption value.
Couples trip savings
A 10-day trip to Guernsey already costs $2,000-$5,000 in flights and hotels. AT&T adds $200 in roaming for two lines. That roaming charge alone covers 4 additional restaurant dinners in Guernsey. Two 20GB eSIMs at $121.66 total redirect $78.34 from carrier roaming to the trip itself. Both eSIMs connect to Sure GG's 4G LTE network — identical to what AT&T routes through.
UK carrier comparison
A UK family of four visiting Guernsey: Vodafone: 4 x GBP6/day x 10 = GBP240. EE: 4 x GBP6/day x 10 = GBP240. Four eSIMs: $243.32. Family savings vs Vodafone: roughly $61.48 USD equivalent.
Our verdict
The savings math for Guernsey is clear. Solo: $39.17 saved vs AT&T for 10 days. Family of four: $156.68 saved. Annual (2 trips): $78.34 saved. All figures use the same Sure GG 4G LTE network. The eSIM costs less at every trip length and every group size.
How much can I save with eSIM in Guernsey?
An eSIM cuts Guernsey data costs by 39% compared to carrier roaming. AT&T charges $100 for 10 days. A 20GB eSIM on Sure GG costs $60.83. The saved $39.17 covers meals, transportation, or activities in Guernsey. Verified May 2026.
How much does roaming cost in Guernsey?
AT&T charges $10/day in Guernsey. A 7-day trip costs $70. A 14-day trip costs $140. A 10-day trip costs $100. An eSIM alternative on Sure GG starts at $60.83 for the same network. Verified May 2026.
Guernsey network context
Local networks
Guernsey has 1 mobile network. The primary carriers are Sure GG, JT, Airtel-Vodafone.
Connectivity notes
- Small island with good coverage
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.
Frequently asked questions
- How much does AT&T roaming cost for 10 days in Guernsey?
- AT&T International Day Pass charges $10/day in Guernsey. A 10-day trip costs $100 in roaming charges. This activates automatically when your phone connects to a local network abroad.
- Is a travel eSIM cheaper than Verizon TravelPass in Guernsey?
- Verizon TravelPass charges $10/day in Guernsey. A 10-day trip costs $100. A 20GB eSIM covers the same trip for $60.83 on the same local network — saving you 39%.
- How much data do I need for a week in Guernsey?
- Most travelers use 1-2 GB per day for maps, messaging, social media, and light browsing. A 7-day trip needs 7-14 GB. Video calls and streaming push usage to 3+ GB per day. Choose a 10GB or 20GB plan for heavy use.
- Can a family share one eSIM in Guernsey?
- One eSIM stays in one phone, but most eSIM plans allow tethering (personal hotspot). A family of 4 can share a single 10-20GB eSIM through one phone's hotspot instead of paying $10/day per person for carrier roaming.
- Does T-Mobile free data work in Guernsey?
- T-Mobile Magenta includes free data in Guernsey, but speed is capped at 256 Kbps. That is too slow for Google Maps, video calls, or uploading photos. The high-speed add-on costs $15/day.
- How much does a 30-day eSIM cost for Guernsey?
- A 30-day eSIM for Guernsey depends on data volume. Metered plans (5-20GB) typically range from $8 to $35. Unlimited daily plans run $1-2/day. Both connect to the same local network as carrier roaming at a fraction of the cost.
- Do UK carriers charge for roaming in Guernsey?
- Vodafone and EE charge £6/day for roaming in Guernsey outside their EU free-roaming zone. A travel eSIM on the same local network costs a fraction of that weekly rate.
- 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.
- Can I use an eSIM instead of roaming in Guernsey?
- Yes. A travel eSIM connects to Sure GG in Guernsey at $3.04/GB. Your phone runs both SIMs at once — the eSIM handles all data traffic while your home SIM stays active for calls and texts. No roaming plan is required, and your home carrier cannot charge roaming if data roaming is disabled on that SIM. The eSIM activates the moment you land in Guernsey and begins using 4G LTE speeds immediately.
- Do roaming charges apply to WiFi usage in Guernsey?
- No. WiFi is free — roaming charges only apply to cellular data. But in Guernsey, WiFi outside hotels and major restaurants is unreliable. An eSIM at $3.04/GB on Sure GG provides continuous 4G LTE data for maps, ride-hailing, and navigation when WiFi is unavailable. The eSIM and WiFi work together — you use whichever is available without switching settings manually.