Will I be connected to the internet the moment I reach Guam's airport?

Yes. If you install your Yeohaengyusim eSIM before leaving Korea, it links up automatically with the GTA TeleGuam network the moment you arrive at Guam's Antonio B. Won Pat International Airport. There's no need to swap SIMs or visit a store.

Does data work well if I travel all around Guam in a rental car?

4G/LTE is available not only in main areas such as Tumon and Hagåtña but also in the south, in places such as Inarajan and Umatac. However, coverage may be weak in some remote spots at the island's northern tip, such as Ritidian Beach, so it's a good idea to save information about the main sights in advance.

Can I receive or make calls with Korea from Guam?

The eSIM is a data-only plan. You can call Korea for free through internet calling apps such as KakaoTalk, FaceTime and Google Duo. If you leave the Korean SIM you were already using in place, your regular calls and texts carry on too.

Do I need an adapter for my Korean plugs in Guam?

Guam is a US territory, so it uses Type A/B sockets. These are different from Korea's Type C/F plugs, so be sure to pack an adapter before your trip. Some resort rooms provide adapters, but it's safer to get one ready in advance.

Which season suits a trip to Guam?

In Guam, January to March is the dry season, with clear weather and low humidity, making it the best time to travel. July to November is the rainy season and typhoon season, and sudden downpours can be frequent. Being close to Korea with a short flight time, it gets a lot of visitors all year round.

Does eSIM work in Guam?

Guam supports eSIM, and plans start from ₩11,587. Install it with the QR code you receive after buying, then just turn on data roaming after you arrive and you are connected straight away. There is no need to swap your SIM.

Travel eSIM or carrier roaming: which is cheaper for a trip to Guam?

For a short trip or light data use, a travel eSIM is usually cheaper. Unlimited roaming from Korean carriers costs about ₩11,000–₩15,000 a day, but with an eSIM you can buy just the days of data you need in advance. For a short trip for one or two people, an eSIM has a big advantage; for a family or very heavy data use, compare carrier unlimited roaming too.

Which carrier network does a Guam eSIM use?

In Guam it connects automatically to local carrier networks such as GTA TeleGuam · Docomo Pacific · IT&E (4G/LTE, 5G where supported). Population coverage is about 90%. It picks the network with the strongest signal automatically, so there is nothing to set up.

Can I keep using my Korean number while travelling in Guam?

Yes. The eSIM works as a data-only second line, so your Korean SIM and number stay as they are. Use the Yeohaengyusim eSIM for data only, and keep receiving calls, texts and KakaoTalk on your Korean number.

Can I add to or extend my Guam eSIM plan?

Yes. When you use up your data or the plan period ends, you can buy a new plan at any time. Keep using the eSIM profile you already installed; there is no need to install it again, so you carry on without interruption.

Can I use tethering (hotspot) in Guam?

Yes. In Guam you can share your eSIM data with other devices such as a laptop or tablet by tethering (hotspot). Shared data also comes out of your plan allowance, so if you tether a lot we recommend choosing a little more data.

Do I set up the eSIM before I leave or after I arrive?

We recommend installing it (registering the QR code) before you leave, while you have Wi-Fi. Data starts when you turn on data roaming after you arrive in Guam. Just remember "set up before you leave, switch on when you arrive" and you can use the internet as soon as you land.

Guam eSIM plans

Instant delivery

A travel eSIM for Guam starts from ₩11,587 and works as soon as you buy it. In Guam it connects automatically to local networks such as GTA TeleGuam · Docomo Pacific · IT&E (4G/LTE, 5G where supported), with population coverage of about 90%. Install it with the QR code before you leave and you can use the internet as soon as you land, with no roaming setup.

Sent instantly by email
30-day refund
Customer support in Korean
Credit card · Apple Pay

Guam eSIM at a glance

Price: From ₩11,587
Local networks: GTA TeleGuam · Docomo Pacific · IT&E
Network: 4G/LTE
Activation: QR code — install before you leave
Recommended data: Maps and messaging 1 GB a day · more room 2 GB a day · video: unlimited

eSIM plans you can use in Guam

Data	Validity	Price
Unlimited	1 day	₩11,587
Unlimited	3 days	₩12,039
Unlimited	5 days	₩28,614
Unlimited	7 days	₩27,107
Unlimited	10 days	₩37,655
Unlimited	15 days	₩55,737
Unlimited	30 days	₩103,954
1 GB	7 days	₩12,039
2 GB	15 days	₩22,587
3 GB	30 days	₩33,135
5 GB	30 days	₩43,682
10 GB	30 days	₩82,859
20 GB	30 days	₩116,009
50 GB	30 days	₩295,319

Blue sea, white sand and pouring tropical sunshine. Guam is a nearby paradise just 4 hours from Korea. It's packed with things to enjoy, from snorkelling at Tumon Beach and exotic food at the Chamorro night market to duty-free shopping. But to really enjoy every moment, a stable internet connection is essential. To check your rental car route on Google Maps, post travel photos on social media in real time and book good restaurants with ease, your data can't drop out. With a Yeohaengyusim Guam eSIM, you install it before departure and connect right away from the moment you set foot in Guam's airport. Enjoy everyday life in Guam with data, simply with a single QR code and no SIM swap.

Flight time from Korea

About 4 hours

Time difference

1 hour ahead of Korea (UTC+10)

Best season to go

January–March (dry season)

Plug type

Type A/B (adapter needed)

Why an eSIM really helps for your trip to Guam

The whole island of Guam is like one huge resort. Many travellers rent a car and drive all over the island, and that's when Google Maps navigation really matters. When you leave central Tumon for out-of-the-way spots such as the Inarajan natural pools or Ritidian Beach, it's easy to get lost without data. To buy a SIM locally, you have to find a carrier store at the airport or in town, which takes time, and communicating in English may also feel like a burden. Roaming with a Korean carrier is easy, but quite expensive. You buy and install a Yeohaengyusim eSIM in Korea in advance, and it links up automatically with the GTA TeleGuam network the moment you reach Guam's airport. You don't have to rely on resort Wi-Fi alone, and your internet won't cut out even while you enjoy outdoor activities such as pool parties and water parks. With the hotspot feature you can share data with the people you're travelling with, which makes it ideal for family trips and couples' trips too.

Network coverage in Guam

Carrier

GTA TeleGuam

+ Docomo Pacific

Network

4G/LTE

Coverage

90%

How do I install a Guam eSIM?

1
Buy a plan
Choose a data plan for Guam and complete payment.
2
Scan the QR code
Open the email we sent and point your phone camera at its QR code.
3
Install the eSIM
Complete the eSIM installation as prompted. Doing it before you leave is simplest.
4
Connect on arrival
Once you land in Guam, switch data roaming on and you're online.

1
Buy a plan
Choose a data plan for Guam and complete payment.
2
Scan the QR code
Open the email we sent and point your phone camera at its QR code.
3
Install the eSIM
Complete the eSIM installation as prompted. Doing it before you leave is simplest.
4
Connect on arrival
Once you land in Guam, switch data roaming on and you're online.

Which plan is right for me?

Short trip

For a short 3–7 day trip, an unlimited data plan is ideal.

Business trip

We recommend a high-data plan with plenty for video calls and email.

Long stay

Staying a month or more? A large-data plan gives the best value.

Family trip

Families sharing a connection across multiple devices should pick a tethering-enabled plan with a generous data allowance.

eSIM, local SIM or pocket Wi-Fi: what suits a trip to Guam best?

	eSIM	Local SIM	Pocket Wi-Fi
Activation	Instant (QR code)	Buy locally	Pick up / delivery
Setup	2 minutes	SIM swap needed	Separate device
Price	From ₩11,587	₩10,000~50,000	₩5,000~15,000/day
Network	Local 4G/LTE	Local 4G/LTE	Local 4G/LTE
Devices	1 smartphone	1 smartphone	Up to 5
Flexibility	Top up any time	Fixed data	Daily rental
Best for	Ideal for travellers	Long stays	Families / groups

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