GUAll Guam eSIM plans compared
| プロバイダー | 価格（5GB） | 通信範囲 | 評価 | こんな方におすすめ |
|---|---|---|---|---|
| HelloRoam | ￥3,032 | GTA Wireless | 4.9/5 | 総合最高 |
| Airalo | ￥2,432 | 200カ国以上 | 4.5/5 | 最多渡航先 |
| Holafly | 無制限 | 160カ国 | 4.2/5 | ヘビーユーザー |
Guamのおすすめトップ3
Guamで利用可能な5件のeSIMプランを評価し、確認済み価格・ネットワーク通信範囲・開通速度・アプリ品質を比較しました。 その中から5件が際立っていました。
メリット： 1GBあたりの価格が最安値、高速開通、GTA WirelessでのGuam通信カバレッジ。 デメリット： 比較的新しいブランドで、Airaloよりコミュニティが小さい。
| ティア | 期間 | 割引 | 開始価格 |
|---|---|---|---|
| ショートステイ | 1-2日 | 4%オフ | $6.70$3.35/日 · 2d |
| ウィークパッケージ | 3-9日 | 8%オフ | $22.48$3.21/日 · 7d |
| 延長ステイ | 10-19日 | 11%オフ | $31.06$3.11/日 · 10d |
| マンスリーパッケージ | 20-29日 | 15%オフ | $59.33$2.97/日 · 20d |
| 長期滞在最もお得 | 30-365日 | 18%オフ | $85.85$2.86/日 · 30d |
メリット： 200カ国以上対応、チャージ可能、最大のコミュニティ。 デメリット： 一部ルートでは新興プロバイダーより割高で、サポートの応答時間にムラがある。
メリット： 真の無制限データ、速度制限なし、24時間365日ライブチャットサポート。 デメリット： プレミアム価格で、1GBあたりの選択肢なし。
Network coverage in Guam
GTA Wireless (Guam Telephone Authority) is the primary carrier and the largest telecom provider in Guam, operating 4G LTE and 3G across the island. DOCOMO Pacific also provides coverage and is popular with Japanese travelers. GTA Wireless has the widest footprint for international visitors, covering Tumon Bay, Hagåtña, the southern villages, and the main highway corridors.
Most eSIM plans for international visitors use GTA Wireless.
通信範囲の分析
GTA Wireless 4G LTE covers Tumon Bay's entire resort strip including the major hotel towers, shopping malls like Micronesia Mall and GPO, and the beach. Antonio B. Won Pat International Airport connects on arrival.
Hagåtña capital district has solid 4G. Route 1 along the west coast from Tumon to Merizo has consistent coverage. Two Lovers Point and Ritidian Point at the island's north tip both have 4G.
The Mariana diving sites on the west coast are accessible via 4G-covered shore areas.
開通方法
Scan your eSIM QR code before arriving at Antonio B. Won Pat International Airport (GUM). GTA Wireless activates your plan within 60 seconds of landing.
Airport SIM card vendors operate near arrivals but involve a queue; an eSIM skips this entirely. Guam uses US-standard time zones and USD currency. iPhone XS or newer, Pixel 3a or newer, and Galaxy S20 or newer support eSIM. Device must be carrier-unlocked.
データ通信の活用のコツ
Budget 450-550 MB per day at Tumon Bay resorts for shopping navigation, resort booking apps, social media, and Google Maps for the military history sites in the south. The Guam Shopping Festival and tax-free electronics stores on Tumon's main strip are easy to navigate on 4G. Diving bookings with local operators use minimal data.
A 7-day plan comfortably covers a standard Guam resort holiday. Download War in the Pacific National Historical Park guides offline for the southern tour route.
Guamのプラン評価方法
Guam eSIM plans start at $7.99 for 7 days on GTA Wireless. HelloRoam unlimited plans cost $13.62 per day, $39.16 for 3 days, $91.38 for 7 days, $176.81 for 14 days, or $349.07 for 30 days. An eSIM saves an estimated $27 compared to roaming.
The 7-day unlimited plan at $91.38 is the practical choice for a full Guam resort holiday. Day-trippers from Saipan or transit passengers can use the 1-day plan at $13.62.
Best eSIM plans for Guam in 2026
| プラン | ネットワーク | 有効期限 | 価格 |
|---|---|---|---|
| Guam Unlimited 1Day ⭐ | GTA Wireless | 1d / 0GB | ￥2,070 |
| Guam Unlimited 3Day | GTA Wireless | 3d / 0GB | ￥5,952 |
| Guam Unlimited 7Day | GTA Wireless | 7d / 0GB | ￥13,890 |
| Guam Unlimited 14Day | GTA Wireless | 14d / 0GB | ￥26,875 |
| Guam Unlimited 30Day | GTA Wireless | 30d / 0GB | ￥53,059 |
Prices verified: May 2026
Questions about Guam eSIMs
What is the best eSIM for Guam?+
How much does an eSIM for Guam cost?+
Which network does an eSIM use in Guam?+
Is Guam a US territory for mobile coverage purposes?+
Is there 4G at Tumon Bay's resorts?+
Can I use eSIM while shopping duty-free in Guam?+
Does my phone support eSIM in Guam?+
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プロバイダーレビュー
Guamで利用可能なトップeSIMプロバイダーの詳細レビューをご覧ください。
