Short answer
US carriers bill the Cayman Islands as international roaming. AT&T’s International Day Pass and Verizon’s TravelPass cost $12/day, charged on each day you use your phone, so a week costs about $84. T-Mobile’s T-Mix More and Loaded plans (and the older Experience plans) include data. For a cruise stop, a Cayman eSIM with 1 GB for 3 days costs $7.50. Staying a week? Digicel sells 12 GB for 7 days for KYD 20 (US$24), tax included, if your phone has a free SIM slot and you can get to a store.
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Cheapest per GB
$49.99
5 GB/day (150 GB total) • 30 days
Checked Nov 9, 2026
Get plan (opens provider site)What each option costs in the Cayman Islands
| Option | Cost | What you get | Source |
|---|---|---|---|
| AT&T International Day Pass | $12/day | uses home plan allowance; talk, text, data; per day; $6/day for each extra line. $20/day per line at sea (cruise ship networks). Charged max 10 days per bill cycle. | att.com Verified Oct 6 Checked Oct 6, 2026 |
| T-Mobile included international roaming | Included in some plans | 5 GB high-speed (T-Mix More, Experience More 2.0) or 15 GB (T-Mix Loaded, Experience Beyond 2.0), then 256 kbps; data, texts; billing cycle; Included on T-Mix More and T-Mix Loaded (launched Nov 2026) and the older Experience More 2.0 and Experience Beyond 2.0. T-Mix Standard includes texts only abroad, calls $0.50/min. Essentials and other older plans differ. | t-mobile.com Verified Nov 7 Checked Nov 7, 2026 |
| Verizon TravelPass | $12/day | uses home plan allowance; talk, text, data; per day | verizon.com Verified Oct 6 Checked Oct 6, 2026 |
| Digicel Cayman prepaid plan | KYD 8–72 | 3 GB (2 days), 6 GB (5 days), 12 GB (7 days), 23 GB (15 days), 45 GB (30 days); unlimited local calls and texts; 2-30 days | digicelgroup.com Verified Nov 7 Checked Nov 7, 2026 |
| Travel eSIM (compared above) | from $0 | GigSky 100 MB / 7 days, data only | Verified Nov 9 |
Does Verizon work in the Cayman Islands?
Yes, through TravelPass, at $12/day, charged on each day you use your phone there. It uses your normal plan’s allowance. The Cayman Islands aren’t part of Verizon’s cheaper Mexico and Canada rate.
Does AT&T work in the Cayman Islands?
Yes. The International Day Pass costs $12/day, plus $6 a day for each extra line. AT&T charges at most 10 days per bill cycle, so a two-week stay costs $120 per line. On a cruise ship’s network at sea it’s $20 a day.
Does T-Mobile work in the Cayman Islands?
Yes. On T-Mix More and T-Mix Loaded, and on the older Experience More 2.0 and Experience Beyond 2.0, data in the Cayman Islands is included: 5 GB or 15 GB at high speed, then up to 256 kbps. T-Mix Standard includes texts but no data abroad, and calls cost $0.50 a minute. Other T-Mobile plans have different terms, so check yours in the T-Mobile app.
Does UScellular work in the Cayman Islands?
It depends on your plan. T-Mobile bought UScellular’s wireless business in August 2025, and UScellular customers kept their old plans for the time being. The last version of UScellular’s travel page (January 2026) said a Daily Travel Pass at $15, or $25 in some countries, is added automatically on days you use your phone; it didn’t list the price for each country. If your account has moved to a T-Mobile plan, T-Mobile’s terms above apply.
Local SIM or eSIM?
The Cayman Islands have two mobile networks, Digicel and Flow, and both sell prepaid plans.
- Digicel: 3 GB for 2 days (KYD 8), 12 GB for 7 days (KYD 20) and 45 GB for 30 days (KYD 72), tax included, with unlimited local calls and texts. Part of each allowance is “entertainment” data for social and streaming apps; on the 7-day plan that’s 5 of the 12 GB.
- Flow: 2 GB for 2 days at $8, 7 GB for 7 days at $20, and 30-day plans from $35. Flow’s page doesn’t say whether those are US or Cayman dollars. Flow also sells an eSIM through its website.
The Cayman dollar is fixed at US$1.20, so KYD 20 is US$24. That’s more data than most travel eSIMs give for the same money, but you need an unlocked phone with a free SIM slot (or Flow’s eSIM), a trip to a store, and a Cayman number while you’re there. For a one-day cruise stop, an eSIM you install at home is simpler.
Which network will a Cayman eSIM use?
Most travel eSIMs for the Cayman Islands run on Flow: Airalo, Nomad, Airhub, aloSIM, GlobaleSIM, Kolet and Maya Mobile all say so. Roamless and Ubigi use Digicel, and Yesim lists both. We haven’t tested either network ourselves.
On a cruise to the Cayman Islands
Grand Cayman has no cruise pier: ships anchor off George Town and tenders bring passengers ashore. Stops are usually one day, so a 1-day or 3-day eSIM is enough. Switch it on once you’re on land. 1. Turn off data roaming on your home line before the ship sails, and keep cellular data off at sea. 2. Install the eSIM at home on Wi-Fi. 3. Switch it on once you’re ashore.
More in our Caribbean cruise eSIM guide. For Wi-Fi on board, see the Royal Caribbean, Carnival, Norwegian, MSC and Princess guides.
Common questions
Will my US cell phone work in the Cayman Islands?
Yes. AT&T, Verizon and T-Mobile all roam in the Cayman Islands, so your phone connects to a local network once data roaming is on. What it costs depends on your plan: AT&T and Verizon charge $12/day for each day you use it, and T-Mobile’s More and Loaded plans include data.
Is the Cayman Islands included in my US phone plan?
Usually not. AT&T and Verizon bill it as international roaming at their daily rate. T-Mobile’s T-Mix More and Loaded plans (and the older Experience More and Beyond) include data there.
Does a Cayman eSIM work on Cayman Brac and Little Cayman?
A Cayman Islands plan covers the whole country, so it works wherever its network reaches. We haven’t checked signal on the Sister Islands.
Do I need a Cayman SIM card for a cruise stop?
No. For one day ashore, an eSIM or your carrier’s day pass is simpler than finding a phone store.
More: eSIM for a Caribbean cruise · Do I need an eSIM? · How to install an eSIM