A Håfa Adai travel eSIM for Guam is sold as unlimited plans only, starting at $8.00 for 3 days. The product page lists the speed as 4G. There is no data-only GB SKU on this product. Coverage is Guam.
Key facts
| Country | Guam |
| Network | Håfa Adai |
| Speed | 4G (published on the product page; subject to carrier Fair Usage Policy) |
| From | $8.00 for 3 days, unlimited |
| Validity | 3, 7, 10, 15, or 30 days |
| Install | QR code, before you fly |
What a Håfa Adai eSIM costs
The Guam travel eSIM is not sold by the gigabyte. Every plan on the product is unlimited, so the decision is the length of the window, not the size of a bucket. Three days costs $8.00, seven days is $18.00, ten days is $25.00, fifteen days is $35.00 and thirty days is $62.00. If you are comparing this to a GB-based plan elsewhere, remember that unlimited here still sits under a Fair Usage Policy, so a hotspot left on all day can be slowed.
Network
The plan is sold under the operator name Håfa Adai and the supported country is Guam. The product page publishes the speed as 4G. That is the figure to plan around. It is not a 5G product, and speed on the ground still depends on the mast, the handset, and the carrier Fair Usage Policy. Guam is covered as its own territory on this plan, including Hagåtña, Tumon, and the road south to Umatac. Signal thins out on the southern jungle roads and on the smaller outlying islands, so download offline maps before a drive. Guam is a US territory, but this plan does not cover the mainland United States: it also does not cover Japan, the Philippines, or the Northern Mariana Islands.
Which window to pick
Because there is no per-gigabyte option, match the window to the trip and nothing else. A long weekend or a short layover is the 3 day plan at $8.00. A week is the 7 day plan at $18.00. A two-week stay is the 15 day plan at $35.00, which is cheaper per day than buying two 7 day plans in a row. The 30 day plan at $62.00 only makes sense for a full month. Note that the allowance is unlimited, not unmetered at full speed: heavy streaming can trigger the Fair Usage Policy, and hotspot use counts as part of it.
Unlimited data
Every plan on this product is unlimited: 3 days at $8.00, 7 days at $18.00, 10 days at $25.00, 15 days at $35.00 and 30 days at $62.00. There is no data-only SKU and no 1 GB, 5 GB, or 20 GB bucket to compare against. Unlimited still sits under a Fair Usage Policy, so a hotspot left on all day can be slowed. Read the window lengths against your dates before you buy, because the plan starts when it is activated.
Dual SIM
Keep your home SIM for calls and bank texts. Turn on data roaming only for the Håfa Adai line. iPhone: Settings, Mobile Data, pick the travel line. Android: Settings, Network, SIMs, set mobile data to the travel eSIM. Do this before you leave the airport Wi-Fi.
Arrival and transit
Most visitors land at Antonio B. Won Pat International Airport (GUM) in Tamuning, about ten minutes from Tumon Bay. Install the eSIM on hotel or home Wi-Fi before the flight, then switch the data line on after you clear arrivals. You do not need a local shop or a passport photo for this plan.
Install
- Buy the plan and open the QR code in the order email while you still have Wi-Fi.
- On the phone, add an eSIM and scan that code. Label the line “Guam”.
- After landing, set mobile data to that line and leave your home number on for texts.
Phone compatibility
The phone must be carrier-unlocked and eSIM-capable. iPhone XS and later, and recent Samsung Galaxy and Google Pixel models, qualify. A locked handset will not take the QR code. Check the lock status with your home carrier before you pay.
FAQ
Q1: How much is the cheapest Guam eSIM?
$8.00 for 3 days of unlimited data, on the Håfa Adai plan.
Q2: Which operator is on the plan?
Håfa Adai. The supported country is Guam.
Q3: Does it include calls and SMS?
No. It is a data plan. Keep your home SIM for calls and one-time passwords.
Q4: Is it 5G?
No. The product page lists the speed as 4G, not 5G. Real speed still depends on coverage and the Fair Usage Policy.
Q5: Can I install it after I land?
Yes, if you can reach Wi-Fi. Installing before the flight is simpler, because the QR download needs a connection.
Q6: Will it work outside Guam?
No. This plan is for Guam. It does not cover the mainland United States, Japan, the Philippines, or the Northern Mariana Islands.
Q7: Is there a data-only plan?
No. This product is unlimited only, priced by the length of the window, from $8.00 for 3 days to $62.00 for 30 days.
Q8: Can I share it as a hotspot?
Yes, within the Fair Usage Policy. Hotspot traffic counts against the same allowance, and heavy sharing can slow the line.
Q9: What if the QR code fails?
Use the manual activation code in the same email. The phone still has to be unlocked.
Q10: When were these prices checked?
October 2026, against the published variation prices on travelydata.com.
Bottom line
For a long weekend in Guam, the $8.00 / 3 day Håfa Adai plan is the one to start with. For a full week take the $18.00 / 7 day plan, and for a fortnight the $35.00 / 15 day plan works out cheaper per day than two 7 day plans. The published speed is 4G, and every plan on this product is unlimited.
Prices and coverage verified on travelydata.com, October 2026.
