Cheapest eSIM for Guam
The cheapest eSIM for Guam right now is CloudOn, 50 GB for 30 Days at $37.99. That is $0.76 per GB.
938 plans from 51 providers, watched and re-ranked by the real price per gigabyte. Every one is a prepaid travel eSIM for Guam that you buy online and install before you fly, so it works the moment you land.
Swipe the table for price and verdict →
| Rank | Provider | Data | Validity | Price (USD) | Price per GB | Verdict | Get |
|---|---|---|---|---|---|---|---|
| Paid placement. It sits above the ranking and does not change it. Advertise here | SponsoredPaid placement. It sits above the ranking and does not change it. Advertise hereMegaEsim Coupon: ESIMWATCHDOG |
20 GB | 30 Days | $58.16 | $2.91 | Sponsored | Get |
| 1 | CloudOn | 50 GB | 30 Days | $37.99 | $0.76 | Best value | Get |
| 2 | Superalink Coupon: ESIMWATCHDOG |
20 GB | 30 Days | $27.13 | $1.36 | Okay | Get |
| 3 | Superalink Coupon: ESIMWATCHDOG |
15 GB | 30 Days | $21.06 | $1.40 | Okay | Get |
| 4 | Lempart Flex Coupon: ESIMWATCHDOG |
30 GB | 10 Days | $49.49 | $1.65 | Fair | Get |
| 5 | Lempart Flex Coupon: ESIMWATCHDOG |
50 GB | 30 Days | $82.99 | $1.66 | Fair | Get |
| 6 | eSIM4Travel | 5 GB | 30 Days | $8.61 | $1.72 | Fair | Get |
| 7 | eSIM4Travel | 3 GB | 30 Days | $5.32 | $1.77 | Fair | Get |
| 8 | CloudOn | 20 GB | 30 Days | $35.99 | $1.80 | Fair | Get |
| 9 | ByteSIM | 30 GB | 10 Days | $55.90 | $1.86 | Fair | Get |
| 10 | MobiMatter Coupon: ESIMWATCHDOG |
12 GB | 30 Days | $22.99 | $1.92 | Fair | Get |
| 11 | ByteSIM | 20 GB | 7 Days | $38.90 | $1.94 | Fair | Get |
| 12 | ASIMGO Coupon: ESIMWATCHDOG10 |
30 GB | 30 Days | $58.86 | $1.96 | Fair | Get |
| 13 | MobiMatter Coupon: ESIMWATCHDOG |
7 GB | 30 Days | $13.99 | $2.00 | Expensive | Get |
| 14 | Saily Coupon: ESIMWATCHDOG |
50 GB | 365 Days | $99.99 | $2.00 | Expensive | Get |
| 15 | ASIMGO Coupon: ESIMWATCHDOG10 |
5 GB | 7 Days | $10.17 | $2.03 | Expensive | Get |
| 16 | AlpineSIM | 20 GB | 30 Days | $51.45 | $2.57 | Expensive | Get |
| 17 | Travel eSIM | 20 GB | 30 Days | $53.36 | $2.67 | Expensive | Get |
| 18 | eSIModo Coupon: ESIMWATCHDOG |
30 GB | 10 Days | $80.30 | $2.68 | Expensive | Get |
| 19 | eSIModo Coupon: ESIMWATCHDOG |
50 GB | 30 Days | $135.00 | $2.70 | Expensive | Get |
| 20 | SparkRoam Coupon: ESIMWATCHDOG5 |
20 GB | 30 Days | $54.60 | $2.73 | Expensive | Get |
| 21 | Nomad | 10 GB | 30 Days | $29.00 | $2.90 | Very expensive | Get |
| 22 | MegaEsim Coupon: SUMMER10 |
20 GB | 30 Days | $58.16 | $2.91 | Very expensive | Get |
| 23 | SparkRoam Coupon: ESIMWATCHDOG5 |
10 GB | 30 Days | $29.40 | $2.94 | Very expensive | Get |
| 24 | Travel eSIM | 10 GB | 30 Days | $29.54 | $2.95 | Very expensive | Get |
| 25 | Wanderly Coupon: ESIMWATCHDOGWILDCARD |
20 GB | 30 Days | $58.99 | $2.95 | Very expensive | Get |
| 26 | SimSmash | 20 GB | 30 Days | $58.99 | $2.95 | Very expensive | Get |
| 27 | MegaEsim Coupon: SUMMER10 |
3 GB | 15 Days | $9.31 | $3.10 | Very expensive | Get |
| 28 | Connect Me Guru Coupon: hello-saun |
20 GB | 30 Days | $62.71 | $3.14 | Very expensive | Get |
| 29 | eSIM Hero | 20 GB | 30 Days | $62.75 | $3.14 | Very expensive | Get |
| 30 | AirPlans Coupon: ESIMWATCHDOG |
20 GB | 30 Days | $63.56 | $3.18 | Very expensive | Get |
| 31 | AlpineSIM | 3 GB | 15 Days | $9.60 | $3.20 | Very expensive | Get |
| 32 | SimSmash | 5 GB | 30 Days | $15.99 | $3.20 | Very expensive | Get |
| 33 | Wanderly Coupon: ESIMWATCHDOGWILDCARD |
10 GB | 30 Days | $31.99 | $3.20 | Very expensive | Get |
| 34 | eSIMfly | 20 GB | 30 Days | $63.97 | $3.20 | Very expensive | Get |
| 35 | Yatelo Coupon: ESIMWATCHDOG |
20 GB | 30 Days | $64.39 | $3.22 | Very expensive | Get |
| 36 | SogdiaRoam Coupon: ESIMWATCHDOG |
6 GB | 10 Days | $19.90 | $3.32 | Very expensive | Get |
| 37 | Connect Me Guru Coupon: hello-saun |
10 GB | 30 Days | $33.63 | $3.36 | Very expensive | Get |
| 38 | eSIM Hero | 10 GB | 30 Days | $33.75 | $3.38 | Very expensive | Get |
| 39 | AirPlans Coupon: ESIMWATCHDOG |
5 GB | 30 Days | $16.95 | $3.39 | Very expensive | Get |
| 40 | Tourist eSIM | 10 GB | 30 Days | $34.22 | $3.42 | Very expensive | Get |
| 41 | Tourist eSIM | 5 GB | 30 Days | $17.62 | $3.52 | Very expensive | Get |
| 42 | Yatelo Coupon: ESIMWATCHDOG |
10 GB | 30 Days | $35.44 | $3.54 | Very expensive | Get |
| 43 | Esimatic | 50 GB | 90 Days | $178.49 | $3.57 | Very expensive | Get |
| 44 | eSIMfly | 10 GB | 30 Days | $36.55 | $3.65 | Very expensive | Get |
| 45 | HiRoaming Coupon: ESIMWATCHDOG20FIRST |
20 GB | 30 Days | $75.12 | $3.76 | Very expensive | Get |
| 46 | Esimatic | 20 GB | 60 Days | $75.49 | $3.77 | Very expensive | Get |
| 47 | Nomad | 5 GB | 30 Days | $19.00 | $3.80 | Very expensive | Get |
| 48 | Lumbus Coupon: ESIMWATCHDOG10 |
20 GB | 30 Days | $78.99 | $3.95 | Very expensive | Get |
| 49 | HiRoaming Coupon: ESIMWATCHDOG20FIRST |
10 GB | 30 Days | $40.05 | $4.00 | Very expensive | Get |
| 50 | Earth Esim Coupon: ESIMWD5 |
20 GB | 30 Days | $80.00 | $4.00 | Very expensive | Get |
| 51 | AdventureSIMs Charged in AUD Coupon: WATCHDOG |
20 GB | 30 Days | $83.50 | $4.17 | Very expensive | Get |
| 52 | Skyalo Coupon: ESIMWATCHDOG |
20 GB | 30 Days | $83.99 | $4.20 | Very expensive | Get |
| 53 | nadanada | 20 GB | 30 Days | $85.99 | $4.30 | Very expensive | Get |
| 54 | Lumbus Coupon: ESIMWATCHDOG10 |
3 GB | 15 Days | $12.99 | $4.33 | Very expensive | Get |
| 55 | Saily Coupon: ESIMWATCHDOG |
10 GB | 180 Days | $43.99 | $4.40 | Very expensive | Get |
| 56 | Earth Esim Coupon: ESIMWD5 |
10 GB | 30 Days | $45.00 | $4.50 | Very expensive | Get |
| 57 | Soovia | 20 GB | 30 Days | $91.39 | $4.57 | Very expensive | Get |
| 58 | SwipSIM | 20 GB | 30 Days | $91.39 | $4.57 | Very expensive | Get |
| 59 | esim0 Coupon: WATCHDOG |
20 GB | 30 Days | $91.99 | $4.60 | Very expensive | Get |
| 60 | Breeze | 20 GB | 30 Days | $92.99 | $4.65 | Very expensive | Get |
598 of these 938 plans were checked against the seller's own shop on 17 October 2026. The rest come from the seller's own feed or plan pages and are not yet independently checked.
The Watchdog Pick is chosen automatically: the lowest real price per GB of the 938 plans in this view. Bulk data pools above 50 GB cannot win it, because their per GB rate only exists if you use data no traveller uses. Providers cannot pay for it, and a commission never changes the ranking. Prices are shown in USD and can change at checkout.
Price per GB counts only data you can use inside the validity, at most 3 GB a day, so a big pool on a short validity cannot buy the top spot. Every provider's best two plans come first, then the rest. A plan marked Unverified price undercuts every other provider here by more than half and waits at the end until we have checked it on the seller's site. How we rank
Unlimited rows show the daily amount at full speed. Some rows also show the speed after that amount. A row with no speed does not mean the plan stays fast, so check the plan on the seller's site.
Some links here earn us a commission. It never changes the order. How we make money The row marked Sponsored is a paid placement shown above the ranking, not part of it. Advertise here.
Crossing borders on this trip? Compare multi country Oceania eSIM plans that keep one line working across several destinations.
Cheapest eSIM for Guam: the numbers
As of 17 October 2026, 06:01 GMT, the cheapest eSIM for Guam is CloudOn with 50 GB for 30 Days at $37.99. That is $0.76 per GB, the best rate of the 938 plans we compare from 51 providers. 315 plans include 5G. 337 support top ups. That timestamp is the exact moment of our latest price check, and the table above always shows the live order.
Which is the best eSIM for Guam?
There is no single best eSIM for Guam, because the right plan depends on how long you stay and how much data you use. What we can do is rank the 938 plans on the numbers, as they stand on 17 October 2026:
- Best value overall CloudOn, 50 GB for 30 Days at $37.99. That is $0.76 per GB, the lowest real rate of every Guam plan we track.
- Best for a short trip eSIM4Travel, 1 GB for 7 Days at $1.80. The cheapest ticket that still gives you at least 1 GB for a week or less.
- Highest daily cap on an unlimited plan SimSmash, 1 Day at $22.99, full speed up to 10 GB a day. Set that daily cap against the fixed plan above before you pay for the word unlimited.
None of these picks is chosen by a person. Each one is the first row of a sort on live prices, so it changes whenever a provider moves a price, and CloudOn did not pay to be named here.
Which mobile networks does Guam have?
Guam is small and well served. Docomo Pacific has run LTE since 2012, and GTA's 5G build passed a third of its cell sites in 2022 before expanding island wide through 2026.
- Docomo Pacific: Docomo Pacific, wholly owned by Japan's NTT Docomo, is the largest provider of mobile, TV and internet services in Guam and launched the first commercial 5G in the Marianas in October 2019.
- GTA: GTA is the homegrown rival with prepaid plans from 2.50 dollars and a 5G network that has grown from a third of its sites in 2022 to locations across north, central and south Guam by 2026.
- IT&E: IT&E serves Guam and the Northern Marianas with cheap prepaid plans and deployed 5G fixed wireless with SK Telecom back in 2019.
The eSIM plans we compare on this page connect to:
The list above is Guam's operator market. The badges are the networks our tracked plans actually roam onto, which can be a subset of it, and the same network is sometimes sold to roaming partners under a different brand name. So a guide praising an operator you do not see badged here is describing a local SIM, not the travel eSIMs compared above.
Is 5G available in Guam?
Docomo Pacific switched on the first commercial 5G in Tamuning and Hagatna in October 2019. GTA followed from 2022 and extended 5G across north, central and south Guam by 2026.
How much data do you need in Guam?
Light use is about 500 MB a day. That covers maps, messages, and some browsing. Normal use with photos, social apps, and short videos runs 1 to 1.5 GB a day. Streaming and hotspot use can eat 2 to 3 GB a day. Here is what each size costs in Guam right now:
Are unlimited eSIMs for Guam really unlimited?
Not always. 412 of the 938 plans above are sold as unlimited, and most of them carry a daily fair use cap. A further 6 plans are unlimited in a different way: one capped speed for the whole plan, shown next to the word Unlimited in the table. For Guam the caps we can see published are 0.5 to 10 GB a day: past that the speed drops, often to 1 Mbps or less, until the clock resets. That is fine for messages and maps, slow for video. At $0.76 per GB from CloudOn, a fixed plan often works out cheaper than unlimited unless you genuinely burn several GB a day. That is why we rank by price per GB and not by the word on the label.
Here is what each seller on this page actually allows per day before it slows you down. No seller publishes this next to its rivals, which is exactly why it is worth showing.
Every seller that publishes a daily allowance is listed on our daily data caps page, with the cheapest plan at each one. The gap between the top and bottom of that table is the whole point. Two plans both sold as unlimited can differ several times over in what you actually get at full speed, and the cheaper one is not always the smaller allowance.
eSIM or a local SIM card at the airport in Guam?
An eSIM is ready before you land. No queue, no shop, no handing over your passport at a counter for a tourist SIM card. Data for Guam starts at $1.80 on this page, which is hard for airport kiosks to beat. A local SIM still makes sense if you need a local phone number or plan to stay for months. For a normal trip, the eSIM wins on price and effort.
Setting up your Guam eSIM
Pick the plan, not the brandThe cheapest rate in Guam today is $0.76 per GB from CloudOn, against a median of $5.12. The QR code arrives by email within minutes of paying.
Install before you flyScan the QR code on wifi at home. Installation needs a connection, and the one thing you will not have when you land in Guam is a working connection.
Turn it on when you landEnable the eSIM and turn on data roaming for it, then give it a minute to attach to GTA, GTA Wireless, IT&E Wireless. Expect 5G where the network reaches, 4G everywhere else.
Know what happens when it runs out337 of the 938 plans here can be topped up, so running out is not the end of the trip. If you would rather over buy than top up, the cheapest plan with at least 5 GB is eSIM4Travel at $8.61.
Good to know before you land in Guam
Kiosks and duty free shops at Guam's Won Pat airport sell SIMs, but a basic card runs about 20 dollars and entry plans around 15 dollars for 7GB over 7 days, so town stores are cheaper.
Guam is a US territory but many mainland plans still treat it as roaming. T-Mobile includes Guam in many of its plans, while AT&T and Verizon customers often pay roaming rates, so check your plan before relying on it.
Guam Travel eSIM FAQ
Everything you need to know about using an eSIM in Guam
What is the cheapest eSIM for Guam?
Right now the cheapest option ranked by price per GB is CloudOn with 50 GB for 30 Days at $37.99. That works out to $0.76 per GB. Prices change often, so the table above is re-sorted at every price check.
Which is the best eSIM for Guam?
It depends on the trip, so we rank rather than pick a favourite. On today's prices the best value for Guam is CloudOn at $0.76 per GB, the lowest real rate of the 938 plans we compare. For heavy daily use there are 412 unlimited plans, most with a daily fair use cap, and they only win if you genuinely burn several GB a day. Every pick on this page is the first row of a sort on live prices. No provider can pay to be named best.
Is eSIM available in Guam?
Yes. We track 938 prepaid travel eSIM plans from 51 providers that work in Guam, roaming onto GTA, GTA Wireless, IT&E Wireless. You need a phone that supports eSIM and is not locked to a carrier; most iPhones from the XS onward and most flagship Android phones from 2019 on qualify.
Which networks will my eSIM connect to in Guam?
The plans we compare connect to GTA, GTA Wireless, IT&E Wireless. The exact network depends on the plan you pick. Check the plan details before you buy if one network matters to you.
Do Guam eSIMs support 5G?
315 of the 938 plans we track for Guam include 5G where the local network offers it. The rest run on 4G, which is still fine for maps, calls over apps, and video.
Can I buy a Guam eSIM online before I travel?
Yes, and you should. Every plan on this page is sold online and delivered by email as a QR code within minutes. Install it on wifi at home, leave the line switched off, and turn on data roaming for it when you land in Guam. The validity clock on most plans only starts when the eSIM first connects.
Can I top up my Guam eSIM if I run out?
Yes. 337 of the 938 plans here support top ups, so you can add data without buying a new eSIM. The rest need a fresh plan once the data ends.
Is an eSIM cheaper than a local SIM card in Guam?
For a trip of days or weeks, usually yes. Data for Guam starts at $1.80 for 1 GB on this page, with no queue, no shop and no passport handed over at a counter. A local SIM card can still win if you stay for months or need a local phone number.
Will I still receive bank SMS and OTP codes?
Yes, if you keep your home SIM active. Travel eSIMs are data only. Your phone can hold both at once, so leave your normal SIM on for SMS and use the eSIM for data. Turn off roaming data on the home SIM to avoid charges.
Do these eSIMs include a phone number or calls?
The plans we compare are data only, so there is no local number. Calls work fine over WhatsApp, FaceTime, or any app that uses data. If you need a real local number, a local SIM is the better tool.
Does a Guam eSIM work on iPhone and Android?
Yes, on any carrier unlocked phone with eSIM support: iPhone XS or newer, Google Pixel 3 or newer, Samsung Galaxy S20 or newer and most recent flagships. The plans are identical on both; only the install steps differ, and both take about a minute on wifi.
How many GB do I need for a week in Guam?
Around 3 to 5 GB covers a week of maps, messaging, and normal browsing. Heavy video or hotspot use needs 1 to 2 GB per day. Today the cheapest plan with at least 5 GB is eSIM4Travel at $8.61.
Which Guam eSIM gives the most data per day?
Of the plans sold as unlimited here, SimSmash allows the most at full speed, 10 GB a day from $22.99. The smallest allowance on this page is 500 MB a day, from 6 sellers. Every one of them is advertised as unlimited, and past the daily allowance the speed drops, often to 1 Mbps or less, until the next day. Check the allowance, not the word.
Travelling further? Compare nearby destinations
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Or see every country on the cheapest eSIM index and track weekly movement on the eSIM Price Index.
How we rank
Prices last checked on 17 October 2026, 06:01 GMT across 938 plans. Every plan is ranked by the true cost per gigabyte, not marketing claims. We do not take money for rankings, and providers cannot pay for a higher position. Read the full method on our how we rank page.
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