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Guam eSIM
Docomo Pacific 4GGTA 5G
Free hotspotFree hotspot on every plan No throttling on fixed-data plans
How much data, for how long?
7 days
8 days
15 days
Validity does not start until your eSIM connects to a supported network at your destination. There is no deadline for first use. You can buy now and keep your plan for a future trip. Full refund on request, used or unused. We always refund the full amount you paid when you request it, whether your eSIM is unused, partly used or fully used. There is no time limit for requesting a refund.
- One-time payment
- Data-only: no phone number, voice calls or SMS. You pay once. There is no automatic renewal or extra charge when your data runs out.
- Top-up eligibility
- Top-ups are separate purchases. My eSIMs shows the options available for your eSIM. Availability can change; if no suitable top-up is offered, you may need to buy a new eSIM.
Going elsewhere too?
Add another country — each one is its own eSIM, all managed in one app.
Guam eSIM at a glance
- Networks
- Docomo Pacific 4G & GTA 5G
- Plans
- 3 plans, 1 GB to 10 GB, valid 7 to 15 days
- Hotspot
- Free hotspot on every plan
- Speed
- No throttling on fixed-data plans
- Calls and texts
- Data only. Call and text through apps such as WhatsApp, or keep your usual SIM on.
- Validity
- Does not start until the eSIM first connects to a supported network at your destination.
There is no deadline for first use. You can buy now and keep your plan for a future trip.
Guam eSIM for Tumon stays, family visits and island drives
Choose Guam eSIM data for the airport transfer to Tumon, appointments in Hagåtña or time with family in the island's villages. Check validity as carefully as the allowance, particularly if arrival and departure fall on different local calendar days from your flights at home.
Guam is a US territory in the western Pacific, but a United States plan label alone does not establish Guam coverage. The airport and Tumon accommodation area are close to the island's main commercial districts, while southern villages, forested hills and coastal roads give a different setting for mobile use. A family stay, a work visit and a beach-based trip may follow the same roads but use very different amounts of data. Choose for those tasks and keep your first address offline before the final flight.
Refund policy
We always refund the full amount you paid when you request it, whether your eSIM is unused, partly used or fully used. There is no time limit for requesting a refund.
No first-use deadline
Validity does not start until your eSIM connects to a supported network at your destination. There is no deadline for first use. You can buy now and keep your plan for a future trip.
Secure checkout
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How eSIM works in Guam
Confirm that the phone is unlocked and supports eSIM, then install over Wi-Fi before leaving. Save the pickup instructions for Antonio B. Won Pat International Airport and the actual hotel or family address. In Guam, set Horizon as the mobile-data line and turn on data roaming for it; disable automatic switching to the home line's data. Installing the profile does not start the validity period; it starts when the eSIM first connects to a supported network in Guam. The service is data-only, with indoor reception, terrain and local network conditions affecting use.
Install your eSIM
Scan the QR or auto-install in the app — no physical SIM.
Land & connect
Data activates on first connection at your destination.
Size it to your trip
Pick the profile closest to your trip. The estimate assumes normal use — maps, messaging, photos, a short call home.
As a rule of thumb, a 3–4 day city break runs on about 1–3 GB, a one-week trip on 3–5 GB, a two-week multi-country tour on 8–12 GB, and working on the road takes about 1 GB a day, so 15 GB or more for two weeks.
Recommended size
3GB3–4 days
≈0.4 GB a day
- Maps every day
- Messaging and photos
- A short call home most days
In total, a 1 GB data allowance covers roughly 330 shared photos, 17 hours of social media and browsing, 2.9 hours of video calls, 13 hours of music streaming, or about 200 hours of maps and navigation. Messaging apps barely use data.
All Guam eSIM plans
Important cities in Guam
Hagåtña · City guide
Hagåtña
Hagåtña is Guam's capital, distinct from the Tumon hotel area. The Plaza de España and the Dulce Nombre de Maria Cathedral-Basilica help orient a visit, but an appointment may need a separate office entrance. Save the address you are actually using and the return pickup point so a short stop does not depend on searching for directions after arrival.
Hagåtña eSIM — set up before you flyTumon · City guide
Tumon
Tumon Bay is lined with hotels and visitor services, so a meeting described only as Tumon can still leave people at different entrances. Keep the property name and lobby or pickup location together. Mobile data can help coordinate a group when a connection is available, but hotel interiors and a busy event can affect the service at a particular spot.
Tumon eSIM — set up before you flyTamuning · City guide
Tamuning
Tamuning contains commercial and residential areas near the airport and Tumon. A shop, clinic appointment or family home may sit away from the obvious hotel frontage. Ask for the precise location before setting off, and save the relevant documents on the handset instead of relying on retrieving a booking from an online account at the door.
Tamuning eSIM — set up before you flySouthern Guam · City guide
Southern Guam
Southern Guam is an area, not another city. A drive through Inalåhan or Merizo can take in family visits and coastal stops beyond the northern hotel districts. Download the route and arrange the day's meeting points before leaving; hills, vegetation and quieter coastal sections may change reception, even though you remain on the same island.
Southern Guam eSIM — set up before you flyWhy Horizon
Read the validity beside the data amount
A larger allowance does not necessarily come with a longer validity period. Compare both values in the live offer, then count your Guam dates, including family visits or work days after a hotel stay. Horizon includes free personal hotspot sharing on a compatible phone during your Guam stay, so a travelling companion or laptop draws from the same allowance. Horizon fixed-data plans have no throttling. If the route adds Saipan, Japan or the Philippines, arrange separate listed coverage for those destinations rather than extending a Guam plan by geography or political association.
Horizon eSIM Before you travel
Plan for
Guam
Compare plan details
Check device compatibility
Install over Wi-Fi before departure
- Pay once
Data at low prices
Choose the data you need and pay the total shown. No subscription or automatic renewal.
- Before departure
Set up before you leave
Scan your QR code or use one-tap installation on supported phones. Install over Wi-Fi before departure.
- Local networks
4G/5G where available
Your plan lists the supported networks. Horizon fixed-data plans have no throttling. Hotspot sharing is free.
- Full refund
Even after you use it
Request a full refund for your eSIM or top-up, used or unused. There is no request deadline.
- Human support
Help, day and night
24/7 human support in all languages, with guaranteed instant replies.
- Multi-country
Global & regional plans
Choose country, regional or global coverage and check every destination in the plan details.
Frequently asked questions
Does a United States eSIM automatically include Guam?
No. Check whether Guam is explicitly listed in the offer. Its status as a US territory does not establish inclusion in every US-labelled plan, and a Guam country plan does not add the mainland United States to its destination coverage.
Does this Guam plan also include Saipan?
Saipan is in the Northern Mariana Islands, a separate destination from Guam for this coverage decision. Check it explicitly in a broader offer or arrange a separate plan before a journey that includes both places.
Should I choose the largest allowance for a longer Guam stay?
Read the validity as well as the data amount. Different offers can give different numbers of days, so check your local arrival and departure dates against the specific plan instead of assuming the larger allowance lasts longer.
What should I prepare for a late airport arrival?
Save the accommodation address, reservation and confirmed pickup arrangements before your final flight. Use the Guam local date from the booking when coordinating with family or a driver, and retain the setup instructions without needing an arrival connection.
Can I work from a laptop at a Tumon hotel using this data?
Horizon includes free personal hotspot sharing for laptop work in Tumon on compatible devices. Count laptop transfers and automatic updates in the allowance, and check the actual connection at the hotel before scheduling work that requires uninterrupted access.
Will the connection be the same on a southern island drive?
It can change as the road leaves built-up districts for hills and quieter coast. Save navigation and meeting points for Inalåhan or Merizo in advance; a successful data session at a Tumon hotel does not establish reception at a later stop.
What does storm preparation mean for mobile data on Guam?
Check official weather alerts, local instructions and your transport operator's updates before travel. Severe weather can interrupt power, transport and networks, so keep accommodation details and revised bookings offline and follow the arrangements made by your host.
Can I keep my WhatsApp and phone number with the Guam eSIM?
Yes. WhatsApp stays linked to your usual number and runs on the eSIM's data. On a dual-SIM phone, your usual SIM can stay on for ordinary calls and texts. Your home carrier may charge for calls, texts or data on that line, so turn off data roaming there.
Does the Guam eSIM include calls and texts?
No. Horizon plans are data-only, with no phone number for calls or texts. Use apps such as WhatsApp or FaceTime over the eSIM's data, or keep your usual SIM on for ordinary calls and texts.
Do I need to turn on data roaming for the Guam eSIM?
Yes. A travel eSIM connects to local networks as a roaming line, so turn on data roaming for the Horizon eSIM when you arrive. The plan is prepaid, so Horizon does not bill you after checkout. Keep data roaming off on your usual SIM to avoid charges from your home carrier.
What happens if I run out of data on the Guam eSIM?
You can buy more. If your plan supports a top-up, My eSIMs shows the data you can add to the same eSIM. If it does not, buy another Guam plan and install it the same way.
Will my phone work with the Guam eSIM?
It will if your phone supports eSIM and is not locked to your home carrier. Many recent iPhone and Android models do, but some regional versions do not, so check your exact model on the supported devices page before you buy.
See supported devicesWill Horizon slow down my data?
No. Horizon fixed-data plans have no throttling. There is no daily limit that slows you down, so you can use your whole plan in one day if you need to. Your speed depends on the local network, your signal and how busy the network is. When your data allowance is used up, the plan stops rather than slowing down.
Can I get a refund if I already used some data?
Yes. We always refund the full amount you paid when you request it, whether your eSIM is unused, partly used or fully used. There is no time limit for requesting a refund.
Where next
