Country guide · OceaniaLocal SIM Cards in Guam: Carriers, Plans & Prices (2026)
Tourist SIM cards in Guam start at $22 from T-Mobile Guam. Buy at A.B. Won Pat International Airport or T-Mobile and IT&E stores in Tumon tourist district.. For instant data without a store visit, a HelloRoam eSIM costs from $4.98 and activates in 2 minutes. See the comparison table below.
- Recommended
- HelloRoam eSIMfrom $4.98, instant activation
- Setup time
- Under 2 mininstall before your flight
- Physical SIM from
- $22 USDT-Mobile Guam
- Network
- 4G LTE / 5GT-Mobile Guam
Guam is a US territory with US-standard mobile infrastructure. T-Mobile has 5G in the Tumon tourist strip. No ID is required. Plans start at $22 for 5 GB. If you are a US T-Mobile subscriber, check your domestic plan first. Many unlimited tiers cover Guam at no extra cost. For everyone else, buy at the airport or in Tumon. Coverage is complete across the island. Prices are high relative to Asian neighbors but the buying process is simple.
Guam is a US territory with US-standard telecom regulation. Three carriers operate: T-Mobile (5G leader), IT&E (local operator), and GTA. No registration required. USD pricing. English spoken everywhere.
eSIM for Guam: the fastest option
Travel eSIMs skip the physical SIM process entirely. Buy online, scan a QR code, and your phone connects to a local network. No passport check, no airport queue, no SIM ejector tool. Most travel eSIMs are data-only, so keep your home SIM active for calls and SMS.
eSIM is convenient for pre-departure activation. Local SIM is equivalent in coverage. US T-Mobile subscribers should check if their domestic plan covers Guam before buying either option.
HelloRoam Guam eSIM: our tested pick
HelloRoam eSIM activates before departure and roams on T-Mobile Guam with 5G capability.
Affiliate link. Commissions never affect our rankings or editorial findings.
| Provider | Data | Validity | Price |
|---|---|---|---|
| HelloRoamOur pick | 1 GB | 7 days | $4.98 |
| Airalo | 5 GB | 7 days | $30 |
eSIM provider comparison
| Provider | Price | Data | Validity | Activation | Score |
|---|---|---|---|---|---|
| HelloRoamTop rated | $4.98 | 1 GB | 7 days | Instant | 8.8/10 |
| Airalo | $30 | 5 GB | 7 days | Instant | 8.8/10 |
Scores based on activation speed, network coverage, support response time, and pricing across 14 countries. HelloRoam (8.8/10, 31/31 activations) is the top-rated provider. All provider links marked as affiliate.
See full eSIM guide for Guam →
eSIM vs physical SIM card in Guam
Here is how a HelloRoam eSIM compares to buying a local SIM card in Guam across the factors that matter most to travelers.
| Feature | HelloRoam eSIM | Local SIM Card |
|---|---|---|
| Setup time | Under 2 minutes | 15-60 minutes |
| Available before travel | Yes, install up to 30 days early | No, buy on arrival |
| ID required | No | No |
| Price from | $4.98 USD | $22 USD |
| Data included | 1 GB to unlimited | Varies by plan |
| Hotspot | Included | Included on most plans |
| Support | 24/7 English | Local language, business hours |
| Local phone number | No, data only | Yes, included |
| Voice calls | Data only, use WhatsApp/FaceTime | Included |
Best SIM cards for tourists in Guam
Guam has 3 providers offering tourist-friendly prepaid SIM cards. The table below ranks them by overall value for travelers, combining coverage, speed, price, and how easy they are to buy.
| Provider | Type | Network | Cheapest plan | Plans | Where to buy |
|---|---|---|---|---|---|
| T-Mobile GuamTop pick | major | 4G LTE / 5G | $25 / $25 | 3 | Airport, Carrier Store |
| IT&E Overseas Group | major | 4G LTE / 5G | $22 / $22 | 3 | Carrier Store, Convenience Store |
| GTA Teleguam | major | 4G LTE / 5G | $24 / $24 | 3 | Carrier Store |
SIM card plans compared
Below are every available tourist plan across all providers in Guam, sorted by price. Prices are quoted in local currency where available, with USD equivalents.
T-Mobile Guam
| Plan | Data | Price | Validity | Calls | SMS |
|---|---|---|---|---|---|
| Tourist 5GBBest value | 5 GB | $25 | 7 days | 60 min local | 50 SMS |
| Tourist 15GB | 15 GB | $45 | 15 days | 150 min local | 100 SMS |
| Tourist Unlimited | Unlimited | $65 | 30 days | Unlimited local | Unlimited |
IT&E Overseas Group
| Plan | Data | Price | Validity | Calls | SMS |
|---|---|---|---|---|---|
| Tourist 5GBBest value | 5 GB | $22 | 7 days | 60 min local | 50 SMS |
| Tourist 15GB | 15 GB | $40 | 15 days | 120 min local | 100 SMS |
| Tourist Unlimited | Unlimited | $58 | 30 days | Unlimited local | Unlimited |
GTA Teleguam
| Plan | Data | Price | Validity | Calls | SMS |
|---|---|---|---|---|---|
| Tourist 5GBBest value | 5 GB | $24 | 7 days | 50 min local | 40 SMS |
| Tourist 12GB | 12 GB | $42 | 15 days | 100 min local | 80 SMS |
| Tourist Unlimited | Unlimited | $60 | 30 days | Unlimited local | Unlimited |
Where to buy a SIM card in Guam
The best place to buy is A.B. Won Pat International Airport or T-Mobile and IT&E stores in Tumon tourist district.. Here is what each channel offers and what to expect.
Airport
Airport counters are the most convenient option on arrival day. Staff speak enough English to handle registration, and you leave the terminal already connected. Expect a small premium (5–15%) over city prices and possible queues after large arrivals.
Carrier Store
Official carrier stores carry every plan, can troubleshoot activation on the spot, and have English-speaking staff in tourist-heavy areas. Prices match the carrier website.
Convenience Store
Convenience stores stock prepaid SIM cards near the checkout. Stock rotates, so selection is narrower than carrier stores, but hours are long and locations are everywhere. Bring your passport.
Buying experience
A.B. Won Pat International Airport has a T-Mobile kiosk in the arrivals area near the baggage carousels. No ID required. Choose a plan, pay USD, and the SIM is activated immediately. Staff speak English. IT&E does not have an airport presence but has stores in the Micronesia Mall (Dededo) and near the DFS Galleria in Tumon, both accessible from resort hotels. GTA has stores in Hagatna. The Tumon tourist strip itself has a T-Mobile store within walking distance of the major resort hotels. 7-Eleven stores throughout Guam sell T-Mobile and IT&E top-up cards.
Coverage & network in Guam
Guam operates on 4G LTE / 5G networks. Coverage quality varies by provider and region.
Coverage Map for Guam
Visit each carrier's website for their interactive coverage map
T-Mobile Guam
major carrier
Urban
Strong
Rural
Strong
IT&E Overseas Group
major carrier
Urban
Strong
Rural
Moderate
GTA Teleguam
major carrier
Urban
Strong
Rural
Moderate
T-Mobile Guam leads on overall coverage with a rating of 5/5 for reach and 5/5 for speed. In cities, all providers perform similarly. Differences become clear in rural areas, along coastal routes, and on islands where network investment varies.
Real-world connectivity
Tumon Bay resort strip gets T-Mobile 5G at 150-300 Mbps. Hagatna government area has 5G and 4G mixed. The main Trans-Island Highway has 4G throughout. Dededo in the north has 4G. The southern villages including Inarajan and Merizo have T-Mobile 4G. The interior jungle areas around Mount Lamlam and the wildlife refuge have 4G along roads but signal drops in dense forest. The Two Lovers Point viewing area has T-Mobile 5G. Tumon Bay beach itself has full signal. The Guam National Wildlife Refuge in the north has 4G along the access road.
Our verdict on SIM cards in Guam
Best for: Japanese and Korean resort tourists, US military and government visitors, Pacific Island hoppers, Diving and beach vacationers.
Guam SIM prices are 3-4 times higher than Japan, Korea, or the Philippines. Coverage quality is excellent but the premium is significant for price-conscious travelers. The US territory status means no customs complications for US citizens.
Activation & registration
Check your phone is unlocked
Your device must be carrier-unlocked to accept a Guam SIM. Check Settings or contact your home carrier before you leave.
Choose a plan before you buy
Decide on data volume and validity period. A 7-day plan suits short trips; 30-day plans are better value for longer stays.
Purchase the SIM
Buy at the airport, a convenience store, or a carrier store. Ask staff to insert and test the SIM before you leave the counter.
Insert and configure
Insert the nano-SIM using the ejector tool. Go to Settings > Mobile Data and confirm data roaming is on for the travel line. Run a speed test to confirm you are connected.
Tips for travelers in Guam
T-Mobile Guam has 5G in Tumon, Hagatna, and major tourist areas. IT&E is expanding 5G coverage.
No registration required. All three carriers sell tourist SIMs without ID.
US citizens and residents may use their US mainland T-Mobile plan in Guam at no extra cost.
The Tumon tourist strip has carrier stores within walking distance of most hotels.
Top up at any 7-Eleven or Payless Supermarket throughout the island.
Common mistakes to avoid
US T-Mobile subscribers roaming without checking if their plan covers Guam. Many unlimited plans include Guam.
Buying a 30-day plan for a 5-day resort stay. Match plan duration to your trip length.
Not checking if your international eSIM covers Guam at US rates. Some global eSIMs treat Guam as international territory.
Frequently asked questions
Does my US T-Mobile plan work in Guam?
Many US T-Mobile unlimited plans include Guam at no extra cost. Check your specific plan details. If not covered, T-Mobile Guam sells local tourist SIMs starting at $25 for 5 GB.
Is there 5G in Guam?
Yes. T-Mobile Guam has 5G in Tumon, Hagatna, and major commercial areas. IT&E is expanding 5G. GTA has strong 4G coverage across the island.
What does a SIM card cost in Guam?
Tourist SIM cards start at $22-25 USD for 5 GB over 7 days. Unlimited 30-day plans cost $58-65 USD. Guam prices are higher than Asia but comparable to other US-associated Pacific territories.
Do I need ID to buy a SIM card in Guam?
No. All three carriers sell tourist SIM cards without registration or ID. Guam follows US telecom regulations where prepaid SIM sales do not require identification.
Will my Asian country SIM work in Guam?
It depends on roaming agreements. Most Japanese, Korean, and Taiwanese carriers offer Guam roaming but at expensive international rates. A local Guam SIM or T-Mobile plan is far cheaper for stays over 2 days.
Which eSIM is best for Guam?
HelloRoam connects to Guam's 4G LTE / 5G network and plans start at $4.98 for 1 GB over 7 days. It works well for travelers who want data active before landing. Airalo offers a wider range of plan sizes at competitive prices. Holafly is worth considering if you want unlimited data and do not mind a higher daily cost.
Should I buy a SIM card or eSIM for Guam?
eSIM is convenient for pre-departure activation. Local SIM is equivalent in coverage. US T-Mobile subscribers should check if their domestic plan covers Guam before buying either option. A local SIM from T-Mobile Guam starts at $22. Choose eSIM if your phone supports it and you value convenience. Choose a local SIM if you need a local phone number or plan to stay longer than two weeks.
Helpful guides
SIM card guides for nearby countries
Traveling beyond Guam? These guides cover nearby destinations.
