Guam is US soil, but your home phone plan probably still charges international roaming rates to use it here.
This guide breaks down every eSIM that actually works in Guam right now, what each one costs, and which network carries your data once you land. You will see where unlimited beats a fixed data bucket for this specific island, and which plan fits a long weekend versus a longer stay. No guessing about coverage: every carrier claim here is confirmed straight from the provider’s own page.
Guam only has two real underlying networks behind these six eSIMs, GTA and Docomo Pacific, both independently confirmed on each provider’s own product page. Roamless runs on IT&E instead, and Saily does not name a carrier at all. Pricing splits into two different shapes, unlimited plans from eSIMply and Airalo, and fixed data blocks from everyone else, so the table below sorts by what you will actually receive, not just the headline price.
| Provider | Plans | From | Network |
|---|---|---|---|
|
eSIMply
Unlimited data on every plan. Names GTA directly. Up to 40% off, no ID required.
Up to 40% off
|
Unlimited · 3-30 days | $8.95Unlimited / 3d |
GTA |
|
Airalo
Also unlimited on every duration. Same GTA network as eSIMply. Cheapest 30-day unlimited on this list.
|
Unlimited · 3-30 days | $8.00Unlimited / 3d |
GTA |
|
Saily
Cheapest true entry price at $7.99. Fixed data only, up to 10GB. Network not disclosed.
|
1GB to 10GB · 7-30 days | $7.991GB / 7d |
Not disclosed |
|
Nomad
Names Docomo directly. Free 1GB trial eSIM for new users. Fixed data only, up to 10GB.
|
1GB to 10GB · 7-30 days | $11.001GB / 7d |
Docomo |
|
aloSIM
Names Docomo Pacific with LTE/5G stated. Bundles a free phone number. Smallest fixed-data ceiling here.
|
1GB to 5GB · 7-30 days | $14.001GB / 7d |
Docomo Pacific |
|
Roamless
Names IT&E with 3G/4G/5G and no throttle policy stated. Genuine free 100MB trial tier included.
|
100MB to 3GB · 30 days | $15.951GB / 30d |
IT&E |
Prices are from each provider's public Guam product page, shown in USD.
Buying a physical SIM in Guam is easy compared with plenty of destinations, but it still means showing a passport at the counter. GTA, IT&E and Docomo Pacific all run their own retail counters at the airport and around Tumon, and Docomo Pacific even sells a Visitor SIM aimed squarely at short trips, but every one of them wants photo ID before handing over a card.
What a local SIM gets you that a data-only eSIM does not is a real Guam phone number, useful if a hotel or a delivery driver needs one to reach you. It also means queueing at a counter after a long flight instead of connecting the moment you land, since the eSIMs in this guide activate from $7.99 for Saily’s cheapest plan and never touch a phone’s actual number at all.
For most visitors, especially the Korean and Japanese travellers who make up Guam’s biggest markets, an eSIM skips the passport-out, form-filling stop entirely and just works from touchdown.
Unlimited data on every duration, no fixed bucket to track
eSIMply’s Guam eSIM runs on GTA, the same network Airalo independently names as its own primary carrier for the island. eSIMply’s own Guam page confirms it directly under “Primary network,” so there is no guessing which tower a phone actually lands on.
Every duration is unlimited data, from a 3-day plan at $8.95 up to a full 30 days at $69.95, both discounted off eSIMply’s listed rate. That flat unlimited structure matters on an island where retail prices already run higher than the mainland US, since there is no overage fee to budget around on top of everything else.
Checkout skips ID verification entirely, and the QR code arrives by email within minutes, with WhatsApp support if installation goes sideways. For a short weekend in Tumon or a longer trip up toward Yigo and the north, the plan just scales with trip length rather than data volume.
| Plan | Validity | Price | Savings |
|---|---|---|---|
| Unlimited | 3 days | $8.95 | Save $5.45 (38%) |
| Unlimited | 7 days | $19.95 | Save $12.45 (38%) |
| Unlimited Best value | 10 days | $26.95 | Save $18.05 (40%) |
| Unlimited | 15 days | $37.95 | Save $25.05 (40%) |
| Unlimited | 30 days | $69.95 | Save $41.65 (37%) |
Buy the plan and the QR code lands by email within minutes. Scan it to install, then toggle the Guam eSIM on once you land, no reboot needed on most recent iPhones and Android phones.
The other unlimited option, and the cheapest one for a full month
Airalo is the only other provider on this list running true unlimited data for Guam, and its own product page names GTA as the primary network too, the same carrier eSIMply uses.
Pricing runs from $8.00 for 3 days to $62.00 for a full 30 days, which works out to close to $2 a day on the longest plan, the cheapest per-day rate of any unlimited option here. Airalo’s app also covers 200+ other destinations, useful if Guam is a stopover rather than the whole trip.
| Plan | Validity | Price |
|---|---|---|
| Unlimited | 3 days | $8.00 |
| Unlimited | 7 days | $18.00 |
| Unlimited | 10 days | $25.00 |
| Unlimited | 15 days | $35.00 |
| Unlimited Best value | 30 days | $62.00 |
Cheapest fixed-data entry price on this list
Saily does not name a specific carrier for Guam, its page only points to “Guam’s best networks,” but it undercuts every other provider here on entry price at $7.99 for a 1GB, 7-day plan.
Data tiers top out at 10GB over 30 days for $48.99, which suits a traveller who knows roughly how much data they will use rather than someone who would rather stop counting gigabytes. Saily is built by the same team behind NordVPN, and the app carries over some of that security tooling, including built-in ad and tracker blocking.
| Plan | Validity | Price |
|---|---|---|
| 1 GB Best value | 7 days | $7.99 |
| 3 GB | 30 days | $24.99 |
| 5 GB | 30 days | $35.99 |
| 10 GB | 30 days | $48.99 |
Names Docomo directly, with a free trial for new users
Nomad names Docomo directly as its Guam network, and backs new customers with a free 1GB trial eSIM before they commit to a paid plan.
Fixed-data pricing runs from $11.00 for 1GB over 7 days up to $29.00 for 10GB over 30 days, undercutting Saily on both the 3GB and 5GB tiers. The tradeoff is the same as every fixed-data competitor here: there is a hard ceiling, not an unlimited allowance.
| Plan | Validity | Price |
|---|---|---|
| 1 GB | 7 days | $11.00 |
| 3 GB Best value | 30 days | $15.00 |
| 5 GB | 30 days | $19.00 |
| 10 GB | 30 days | $29.00 |
Confirms Docomo Pacific by name, with a free number bundled in
aloSIM confirms “docomo pacific” by name as its Guam network and states LTE/5G speeds directly on the page, one of the more specific network disclosures on this list.
Plans start at $14.00 for 1GB over 7 days, the highest fixed-data entry price here, and top out at 5GB over 30 days for $35.00. The plan comes bundled with a free international phone number through the aloSIM app, a small extra the other fixed-data competitors do not offer.
| Plan | Validity | Price |
|---|---|---|
| 1 GB | 7 days | $14.00 |
| 2 GB | 15 days | $17.00 |
| 3 GB | 30 days | $25.00 |
| 5 GB Best value | 30 days | $35.00 |
Names IT&E directly, with a genuine free trial tier
Roamless names IT&E as its Guam network and states “3G/4G/5G” plus unlimited hotspot directly in its technical details, more disclosure than most competitors on this list bother with.
New customers get a genuine free 100MB, 30-day trial tier with no catch, and Roamless’s own site states “Speed limit: Never” on its paid data plans. The tradeoff is a low data ceiling, topping out at just 3GB for $45.45, so it suits testing the network or light use rather than a data-heavy trip.
| Plan | Validity | Price |
|---|---|---|
| 100 MB (free trial) | 30 days | $0.00 |
| 1 GB Best value | 30 days | $15.95 |
| 2 GB | 30 days | $31.45 |
| 3 GB | 30 days | $45.45 |
Guam throws one genuine curveball at travellers, and it has nothing to do with beaches or time zones: assuming American soil means American phone coverage. Beyond that, the practical details, tipping, getting around, typhoon season, are closer to what a first-time Pacific traveller expects than a guide to a more remote destination has to cover. Here is what actually matters before you land.
Guam is US territory, so it feels like a regular phone plan should just work there the way it does driving from Texas to Arizona. AT&T and Verizon generally do not see it that way, and even T-Mobile only includes Guam under its international roaming plans, not baseline domestic service.
That mismatch is common enough that Guam residents ask about it on r/guam when they travel the other direction, and visitors ask the reverse question just as often. An eSIM sidesteps the whole question, since it is a flat rate agreed in advance, whether a traveller’s home carrier would have covered the island or not.
Neither Uber nor Lyft operates in Guam at all, which surprises visitors used to opening one app in any US city. Stroll, the island’s original app-based ride service, and Good To Go Rides, a newer competitor with the same on-demand model, are the two real local options.
Street taxis exist too, but fares are zone-based rather than metered, so confirm the price before getting in.
Because Guam is US territory, American citizens travel there without a passport, the same as flying between any two states. What is required, since the REAL ID Act’s enforcement date, is a REAL ID-compliant driver’s licence or state photo ID, or a passport or passport card as an alternative, to clear TSA screening.
The Guam Visitors Bureau’s own entry and exit page spells out the exact document rules for both US citizens and international visitors.
The Guam-CNMI Visa Waiver Program lets nationals of Australia, Brunei, Hong Kong, Japan, Malaysia, Nauru, New Zealand, Papua New Guinea, Singapore, South Korea, Taiwan and the United Kingdom enter visa-free for stays up to 45 days, provided they hold a valid passport, a confirmed return ticket, and complete the electronic travel authorization.
That list happens to cover Guam’s two biggest source markets, South Korea and Japan, which is a large part of why the island’s visitor numbers lean so heavily Asian rather than mainland American.
Many restaurants around the Tumon tourist strip automatically add a 10 to 15 percent service charge to the bill. That charge goes to the business rather than the server, so it is not the same as a tip, but it is easy to miss and end up tipping twice on top of a charge that is already included.
Pacific Island Times, a regional Guam-based outlet, has covered the local confusion this causes.
Guam sits in an active typhoon corridor, and Guam Homeland Security and its Office of Civil Defense pushes storm updates and Condition of Readiness levels through its own site and social channels rather than one well-known app.
During an active storm, visitors are advised to stay inside their hotel until the all-clear condition is declared, and mobile data is often the fastest way to see that update before local broadcast catches up.
No Uber or Lyft exists on Guam. Stroll and Good To Go Rides are the two real ride-hailing apps, and most visitors who want to leave the Tumon strip end up renting a car instead.
Guam runs on US dollars only, no Korean won or Japanese yen accepted anywhere despite both being major source markets. Cards work throughout Tumon and Tamuning, and Stroll even accepts Kakao Pay and Naver Pay directly.
Public buses exist but run infrequently and skip most beaches and attractions outside central Tumon. Most visitors who want to reach Hagatna, the southern villages or the island’s viewpoints end up renting a car, which the Guam Visitors Bureau itself recommends for exactly that reason.
Traffic on the main corridor, Marine Corps Drive, linking Tumon to the airport and Hagatna, gets genuinely congested at peak times. That is worth knowing if timing a data-heavy video call or a map-heavy drive around rush hour matters to the day’s plan.
On money, Guam’s currency is the US dollar and nothing else circulates. International visitors, especially the Korean and Japanese travellers who make up the island’s biggest markets, need to change money or lean on cards before local cash runs out, since won and yen are not accepted anywhere on the island.
ATMs are common in hotels and shopping centres and generally accept international cards on the Cirrus, PLUS and Maestro networks, so carrying large amounts of cash from home is not necessary. Prices in Tumon’s restaurants and souvenir shops do run noticeably higher than a typical mainland US beach town, so budgeting a bit extra is realistic.
These are the apps that solve Guam’s actual gotchas rather than a generic packing list: the ride-hailing apps that exist because Uber does not, and the practical tools for an island where most visitors are not travelling from the US mainland at all.
Tipping follows US norms, roughly 15 to 20 percent at sit-down restaurants and for rideshare drivers, but many Tumon restaurants already add a 10 to 15 percent service charge to the bill, so check first or risk tipping twice.
Guam’s currency is the US dollar only, and cards including Apple Pay and Google Pay are widely accepted around Tumon and Tamuning. ATMs are common in hotels and malls and generally accept international cards, so carrying large amounts of cash from home is not necessary.
Five villages where your eSIM will earn its keep, and where coverage differences between providers actually start to matter:
Six real options is a manageable list, but the right one still depends on a few honest questions about a trip. Are you spending the whole time in Tumon, or renting a car to see the rest of the island? Do you need a hard data cap to track, or would you rather stop thinking about gigabytes entirely?
eSIMply’s general guide to picking an eSIM plan covers the universal basics. The four questions below are specific to what actually changes on a Guam trip.
A beach day in Tumon with Stroll bookings, Google Maps and normal social media use rarely clears 1GB, which is why Saily’s and Nomad’s 1GB, 7-day plans exist. Add video calls home, music, or map-heavy hiking with AllTrails open, and 1GB disappears fast, so a 3-5GB plan or one of eSIMply’s and Airalo’s unlimited tiers removes the guesswork.
eSIMply and Airalo both confirm GTA by name, and Nomad and aloSIM both confirm Docomo Pacific, so choosing between those four really comes down to price and plan shape rather than coverage. Roamless names IT&E specifically and states no throttling on its data plans. Saily is the one provider here that will not name a carrier, so treat its coverage as good but unconfirmed.
Signal from every network here is strongest along the Tumon, Hagatna and Tamuning corridor, where most hotels, restaurants and the airport sit. Head north toward Yigo and Andersen Air Force Base or out to the quieter southern villages and coverage gets noticeably patchier, so download offline maps before leaving the main strip.
If Guam is the whole trip, a Guam-specific plan from this comparison beats a regional bundle on price every time, since regional data costs more per gigabyte than a single-destination plan. If the itinerary continues to Japan, South Korea or elsewhere in Asia, Airalo and Nomad both sell regional and global bundles worth pricing against buying Guam separately plus another single-country plan later.
Set the Guam eSIM as the primary data line before leaving home, and turn on data roaming for it specifically once you land, since that single step is what most “No Service” reports trace back to. Download offline Google Maps for the Tumon through Hagatna corridor while signal is still solid, before heading toward Yigo or the southern villages.
The questions below cover what actually trips up first-time Guam visitors, not a generic FAQ template.
Most of them come back to one thing: figuring out whether an existing phone plan already covers the island before landing, and what to do about it if it does not.
We work in eSIM technology full-time, so this is not a side project. Every carrier claim in this guide traces back to the exact wording on each provider’s own Guam product page, quoted directly rather than assumed, and we checked all eight of our usual providers against Guam specifically rather than reusing a generic Pacific-region list.
We may receive commission from some providers if you purchase via our links. This never influences our rankings. Underperforming providers get excluded regardless of affiliate relationship.
Jamie has worked in telecommunications for more than 8 years across mobile, SMS, eSIM, apps, and adjacent technology. He now writes for eSIMply as the tech content writer, analysing the top eSIM providers and breaking down what travellers actually need to know.
While we do our best to ensure accuracy, prices and plan availability are subject to change. Last updated by Jamie Cole.
