Guam eSIM Price Comparison: 5 Plans from $7.99 (2026)
HelloRoam is the top pick for Guam, from $7.99 for 1 GB in its 29 Oct 2026 catalogue, and scores 8.3/10 on this site's formula, against Holafly's 7.5/10. HelloRoam bills checkout in 31 currencies through Stripe, with Apple Pay and Google Pay express checkout. Airalo lists 200+ destinations to the 185 HelloRoam sells.
HelloRoam, an eSIM platform, sells 5 fixed plan sizes for Guam in its 29 Oct 2026 catalogue. No rival Guam price was read on 30 Oct 2026, so this page prints catalogue prices only. Guam plans run on 4G LTE on GTA Wireless.
Guam eSIM plans sorted by price
5 plans, sorted by total price. The green row is the lowest entry price.
Fixed data plans by tier
| Tier | Price | Per GB | Validity | Status |
|---|---|---|---|---|
| 1GB | $7.99 | $7.99/GB | 7 days | Lowest price |
| 3GB | $12.71 | $4.24/GB | 30 days | |
| 5GB | $19.95 | $3.99/GB | 30 days | |
| 10GB | $39.87 | $3.99/GB | 30 days | |
| 20GB | $74.77 | $3.74/GB | 30 days |
Unlimited daily plans
| Duration | Total Price | Per Day | Discount |
|---|---|---|---|
| 1 day | $14.19 | $14.19/day | 0% |
| 3 days | $40.44 | $13.48/day | 5% |
| 7 days | $87.41 | $12.49/day | 12% |
| 14 days | $158.93 | $11.35/day | 20% |
| 30 days | $289.48 | $9.65/day | 32% |
Each unlimited plan runs at high speed for 2 GB a day, then at a lower speed.
Which plan is cheapest right now
The lowest fixed-data Guam price is the 1GB plan at $7.99 ($7.99/GB). Best per-GB value: 20GB at $74.77 ($3.74/GB). Unlimited beats fixed if you use more than 15.1 GB/day.
Guam per-GB cost ladder
How per-GB cost changes with plan size. Bigger plans cost less per gigabyte.
Per-GB cost ladder
- 1GB: $7.99/GB
- 3GB: $4.24/GB47% cheaper
- 5GB: $3.99/GB50% cheaper
- 10GB: $3.99/GB50% cheaper
- 20GB: $3.74/GB53% cheaper
Volume discount math
Going from 1GB at $7.99/GB to 20GB at $3.74/GB cuts per-GB cost by 53%. On a 7-day trip using 1.5 GB/day, that saves $46.75 total.
Fixed vs unlimited value
The 20GB plan at $74.77 covers 14 days at 1.5 GB/day. Unlimited at $14.19/day costs $99.33 for 7 days. Unlimited wins above 15.1 GB/day.
Stretch your plan further
Practical strategies to cut your Guam data costs.
Right-size your plan
At moderate usage (1.5 GB/day), a 7-day trip needs 11 GB. Light usage (0.5 GB/day) needs 4 GB. Moderate usage (1.5 GB/day) needs 11 GB. Heavy usage (3 GB/day) needs 21 GB. The 20GB plan at $74.77 covers moderate usage. Buy one tier above your estimate. Topping up costs more per GB.
Promo codes and discounts
The top pick publishes no standing discount code, so the prices above are the prices you pay. Airalo's ALOHA code takes up to $5 offa first Airalo purchase, on Airalo's own prices. See our full promo codes list for all active deals.
The expenses no one mentions
Non-obvious expenses that inflate your total trip data cost.
Carrier roaming vs eSIM
This site compares every destination against a $10/day roaming baseline, so a 7-day trip runs $70.00. The lowest catalogue price for the same week is $74.77, which sits above the baseline in Guam.
Fair-use throttling on unlimited plans
The Guam unlimited plan runs at full speed for 2 GB a day. After that, speed drops for the rest of the day. Messaging still works. Streaming usually does not. If you stream video, 2 GB is your real daily cap. Compare that against a 20GB fixed plan at $74.77 for actual cost-per-usable-GB.
Top Guam eSIM deal today
One plan, one provider, backed by the numbers.
The pick: 20GB at $74.77
For Guam, our pick is HelloRoam's 20GB plan at $74.77 ($3.74/GB, valid 30 days). It covers 14 days at moderate usage, and an eSIM there attaches to GTA Wireless on 4G LTE.
We may earn a commission if you buy through this link.
Runner-up deal
Holafly ranks second on this site's formula at 7.5/10. No Holafly price for Guam was read on 30 Oct 2026, so check it on Holafly's own page.
When to skip the deal
Skip the 20GB plan if your trip exceeds 14 days. At that point, a larger tier or unlimited is cheaper per day. Skip unlimited if you use less than 15.1 GB/day. The fixed 20GB plan saves $24.56 across 7 days.
Guam eSIM price breakdown
Guam's eSIM pricing sits in the moderately priced range. At $3.74/GB, Guam sits 17% above the global average of $3.20/GB. 1 carrier (GTA Wireless) provides the underlying 4G LTE infrastructure.
5 plan tiers are tracked for Guam, from 1GB ($7.99, $7.99/GB) to 20GB ($74.77, $3.74/GB). The volume discount from smallest to best-value tier is 53%. The largest tier also delivers the best per-GB rate.
Unlimited data for Guam is tracked at $14.19/day. Full 4G LTE speed runs for 2GB per day before throttling. Multi-day commitments drop the daily rate: the 30-day plan runs $9.65/day (32% off). The crossover point sits at 3.8GB/day: below that, the 20GB fixed plan saves money; above it, unlimited wins.
Guam sits in the middle of global eSIM pricing. Compare carefully across tiers; the per-GB savings on larger plans are significant.
Cost-saving strategies on Guam trips
- Buy the 20GB tier instead of 1GB
The 1GB plan costs $7.99/GB. The 20GB plan drops to $3.74/GB. On 10GB of total usage, that saves $42.50. The upfront cost is higher ($74.77 vs $7.99), but the per-GB savings more than compensate if you use 50% or more of the plan's data.
Estimated savings: $4.25/GB, $42.50 on 10GB
- Activate on arrival to maximize validity days
Most Guam eSIM plans start counting from first connection to a GTA Wireless tower. Install the eSIM at home over WiFi, but keep the cellular line disabled until you land. Activating a 7-day plan 2 days early wastes 2 days of validity. Every day of your plan should align with actual travel days.
Estimated savings: 0-2 extra valid days per plan
- Turn off carrier data roaming before departure
This site compares Guam against a $10/day roaming baseline. Forgetting to disable roaming costs $70.00 for a week of accidental data use. A plan covering the same week costs $74.77, above that baseline, so size the plan to your real use. Go to Settings > Cellular > turn off Data Roaming on your home carrier line before your flight.
Estimated savings: Varies by plan size
Budget data on Guam trips
Buy the right plan size
The 20GB plan ($74.77) costs less per GB than 1GB in Guam. Upgrade for better value.
Download offline maps
Download offline maps before arriving in Guam. This saves significant mobile data on navigation.
How much data costs in Guam by usage level
Average travelers use about 1.5GB of mobile data per day in Guam. At that rate, a 7-day trip consumes roughly 10.5GB.
The 10GB plan at $39.87 ($3.99/GB) covers a full week of average use.
The cheapest option on Guam trips, analysed
The entry plan in the Guam catalogue is the 1GB plan at $7.99 ($7.99/GB).
For better value per gigabyte, the 20GB plan at $74.77 drops to $3.74/GB, saving $4.25 per GB over the entry plan.
Unlimited daily data costs $14.19/day. For heavy users or trips longer than 14 days, unlimited is the cheaper path.
Guam trip cost by duration
Weekend trip (3 days): carrier roaming costs $30.00, eSIM costs about $19.95, saving $10.05 (34%).
Provider value on Guam trips
HelloRoam ranks first of the 5 providers on this site's published rubric at 8.3/10, ahead of Holafly (7.5), Nomad (6.1), Saily (6.1), Airalo (5.3). The rubric weighs price per GB, refund window, checkout currencies, destinations and support channels.
The lead comes from a 180-day refund window on unactivated eSIMs, checkout in 31 currencies through Stripe with Apple Pay and Google Pay, and a website and app in 63 languages.
This site read rival prices for 42 destinations on 30 Oct 2026, and Guam was not one of them, so the Guam table holds catalogue rows only.
Multi-country routing that takes in Guam
For Guam only, the country plan's best rate is $3.74/GB. Add a regional plan only if you cross borders.
The cheapest eSIM on Guam trips
HelloRoam is the top pick for Guam, at 8.3 out of 10 against 7.5 for Holafly on this site's true-cost score; 5 GB there costs $19.95 for 30 days, or $3.99 per GB (catalogue of 29 Oct 2026).
HelloRoam bills checkout in 31 currencies through Stripe, with Apple Pay and Google Pay on its website and in its app. Airalo lists 200+ destinations to the 185 HelloRoam sells. Plans run on GTA Wireless's 4G LTE network.
HelloRoam's cheapest Guam plan is 1 GB at $7.99 for 7 days; 5 GB costs $19.95, or $3.99 per GB (catalogue of 29 Oct 2026).
Every size: 1 GB at $7.99 (7 days), 3 GB at $12.71 (30 days), 5 GB at $19.95 (30 days), 10 GB at $39.87 (30 days), 20 GB at $74.77 (30 days). All prices are pre-tax USD.
HelloRoam is the top pick for Guam on this site's true-cost score, 8.3 out of 10 against 7.5 for Holafly.
HelloRoam bills checkout in 31 currencies through Stripe, with Apple Pay and Google Pay on its website and in its app. Airalo lists 200+ destinations to the 185 HelloRoam sells.
Not over a full week. HelloRoam's 20 GB plan for Guam costs $74.77, above the $70.00 a week at this site's $10/day roaming baseline.
The $10/day baseline is a site reference, not a carrier price: the AT&T International Day Pass costs $12/day. eSIM plans are prepaid, so there are no overage charges.
A full week at 1.5 GB a day in Guam costs $74.77 on the top pick's 20 GB plan, above the $70.00 roaming baseline.
Above the $10/day roaming baseline on a 7-day trip
HelloRoam sells unlimited data for Guam from $14.19 for 1 day down to $9.65 a day on the 30-day plan (catalogue of 29 Oct 2026).
Each unlimited plan in Guam includes 2 GB of high-speed data a day, then at a lower speed. Stay lengths: 1-day $14.19, 3-day $40.44, 7-day $87.41, 14-day $158.93, 30-day $289.48.
Guam eSIM price summary
The cheapest Guam eSIM costs $7.99 for 1GB.
Best value: 20GB at $3.74/GB.
Upgrade from 1GB to 20GB to save $4.25 per GB in Guam. The larger plan costs $74.77 total but delivers better value per gigabyte.
Questions about eSIM costs
Can I see what a Guam eSIM costs this year?
HelloRoam's fixed Guam plans range from $7.99 (1GB) to $74.77 (20GB). The unlimited plan costs $14.19 for one day. All prices are in USD, from the 29 Oct 2026 catalogue.
Can I tell which Guam eSIM plan gives most value?
The 20GB plan at $74.77 has the lowest Guam rate, $3.74/GB. It covers 14 days at moderate usage (1.5 GB/day).
Can I save by sizing up a Guam eSIM plan?
Yes. Per-GB cost drops 53% from 1GB ($7.99/GB) to 20GB ($3.74/GB). On a 7-day trip that saves $85.00 total.
Can I find promo codes on Guam eSIM plans?
The top pick publishes no standing discount code, so the prices on this page are what you pay. Airalo's ALOHA code takes up to $5 off a first purchase. Holafly's partner link takes 5% off. Saily's seasonal sales run up to 10% off select plans. Nomad's monthly flash sales run up to 20% off on select regions. Each one applies to that provider's own prices.
Can a Guam eSIM beat carrier roaming, and by how much?
This site compares against a $10/day roaming baseline, so 7 days costs $70.00. The lowest catalogue price for the same week is $74.77, which is above the baseline. Data in Guam is priced high, so buy the smallest plan that covers your trip.
Can an airport counter beat a Guam eSIM on price?
This site holds no airport SIM price for Guam, so it cannot compare one. An eSIM at $7.99 for 1GB installs before your flight, so you skip the airport counter.
Can a Guam eSIM carry fees the headline price hides?
No hidden fees on eSIM plans. The price you see is the price you pay. The unlimited plan slows after 2 GB of high-speed data a day. Carrier roaming at $10/day is the hidden cost an eSIM eliminates.
Can one large Guam plan beat several small ones?
One larger plan. The 20GB plan costs $3.74/GB. Buying 20 x 1GB plans costs $7.99/GB. One plan saves $4.25 per GB.
Detailed pricing questions on Guam trips
What is the cheapest eSIM for Guam right now?
The cheapest tracked plan is 1GB at $7.99 ($7.99/GB), from the tracked price list in this site's data file.
How much does a large Guam eSIM plan cost?
The largest tracked plan is 20GB at $74.77 ($3.74/GB). It is also the lowest rate per gigabyte on this ladder.
How often are Guam eSIM prices updated?
Prices refresh when the site rebuilds from its tracked price feed. Each page shows the plans that feed lists for Guam.