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Connectivity
Prepaid tourist SIMs, eSIM options, and the best way to stay connected in Guam
Verified 2026 · Island Seeker Editorial
quick answer
The best SIM card options for tourists in Guam are: IT&E Hafa Adai SIM (unlimited data + calls, 7 days, widely available at gas stations and supermarkets), Docomo Pacific Visitor SIM (7GB data, 7 days, USD 25, great for Japanese tourists with Japan call minutes included), and GTA Teleguam ($10 for 4 days or $20 for 8 days unlimited). eSIMs from Airalo or Nomad are the most convenient option if your phone supports it.
Main carriers
IT&E, Docomo Pacific, GTA
Tourist SIM price
USD 10–25
Network speed
4G LTE / 5G (select areas)
Typical validity
4–8 days
Where to buy
Gas stations, supermarkets, resorts
Airport SIM
Available (pricier)
IT&E's Hafa Adai tourist SIM is one of the most popular options for visitors. It includes unlimited data, unlimited local calls and SMS, and USD 10 in international call credit, valid for 7 days. "Hafa Adai" is the CHamoru greeting, reflecting its tourist positioning.
The Hafa Adai SIM is widely available across the island — IT&E stores, Shell and 76 gas stations, AAFES (military exchanges), Bon Voyage gift shops in the airport, resort gift shops, and many supermarkets. It is one of the easiest SIM cards to purchase without a language barrier. IT&E uses its own network infrastructure with good 4G LTE coverage across Guam's main populated areas.
Docomo Pacific's Visitor SIM is priced at USD 25 and includes 7GB of data, unlimited local calls and SMS, 15 minutes of international calls to the US, Japan, South Korea, Taiwan, China, and Russia, plus unlimited access to all Docomo Pacific WiFi hotspots on the island — valid for 7 days.
This option is particularly well-suited for Japanese tourists — the included Japan call minutes and the DOCOMO brand familiarity make it a popular choice. Coverage is strong across Tumon, Tamuning, Hagåtña, and major tourist areas, with good performance for streaming and maps. Purchase at Docomo Pacific stores in the main shopping areas.
GTA Teleguam offers two prepaid tourist plans: USD 10 for 4 days of unlimited voice, SMS, and data; or USD 20 for 8 days of unlimited voice, SMS, and data. These are among the most affordable options available. GTA has operated in Guam for decades and has reliable 4G LTE coverage across the main tourist areas.
GTA SIM cards are available at GTA stores and select retail locations. Coverage in rural southern and northern villages may be less consistent than in the main urban areas.
If your phone supports eSIM (most smartphones released after 2019 do), an eSIM is the most convenient option — you can activate data before you leave home and have connectivity from the moment you land. No need to find a shop or swap physical SIMs.
Popular eSIM providers for Guam include Airalo, Nomad (from USD 10/week), aloSIM (from USD 14/week), and Yesim (from USD 15.60). These run on local network infrastructure and provide 4G LTE data. Check your phone's eSIM compatibility before purchasing.
Note: eSIM plans typically offer data only — no local calls or SMS. For most tourists who rely on WhatsApp, Line, KakaoTalk, or other internet-based messaging for calls, this is not an issue. If you need local call capability, the IT&E or Docomo Pacific physical SIM is a better choice.
Avoid buying at the airport if possible — prices at airport kiosks are typically higher for less data. The best value purchases are at IT&E stores, Shell or 76 gas stations (common across the island), or supermarkets. Most locations have English-speaking staff.
Free WiFi is available at the airport, major hotels, and many restaurants and cafes — sufficient for light use before getting a SIM. If you already have a US carrier plan (AT&T, T-Mobile, Verizon), check whether Guam is covered under your existing data plan, as some US domestic plans include Guam at no extra cost.
questions & answers
What is the best SIM card for tourists in Guam?
The IT&E Hafa Adai SIM (unlimited data + calls, 7 days) is the most widely available and practical option for most tourists — sold at Shell and 76 gas stations, supermarkets, and resorts across the island. The Docomo Pacific Visitor SIM (USD 25, 7GB + Japan call minutes) is better for Japanese tourists who want to call home. If your phone supports eSIM, Airalo or Nomad offer competitive data-only plans from around USD 10 without needing a physical SIM swap.
Can I use my Japanese/Korean phone in Guam?
Yes — Japanese and Korean phones work in Guam. Guam uses GSM/LTE networks compatible with international devices. Japanese carriers (NTT Docomo, Softbank, au) and Korean carriers (SKT, KT, LG U+) offer international roaming in Guam, but roaming fees are typically very high — purchasing a local Guam SIM or eSIM is far more cost-effective for stays longer than 1–2 days.
Is there 5G in Guam?
5G is available in select areas of Guam, primarily in Tumon and Tamuning. For most tourist purposes, 4G LTE — which is widely available across all major tourist areas — is more than sufficient for maps, streaming, social media, and video calls. Rural and jungle areas may have limited 4G coverage.
Does my US phone plan work in Guam?
Guam is a US territory — many US domestic carrier plans (AT&T, T-Mobile, Verizon) include Guam as part of their domestic coverage at no extra cost. Check your plan details before travelling: T-Mobile's Magenta and Magenta Max plans, for example, include Guam at domestic rates. If your US plan covers Guam, you may not need a local SIM at all.
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