| アメリカのeSIM・プリペイドSIM比較（T-Mobile・Verizon・AT&T）＆オフライン地図 | 2026/2027 USD ($) |
|---|---|
| Guide | アメリカのeSIM・プリペイドSIM比較（T-Mobile・Verizon・AT&T）＆オフライン地図 |
| Overview | 空港着陸直後から使える米国eSIMの選び方、国立公園での電波状況、Googleマップのオフライン保存手順。 |
| Calculator | US Budget Calculator ($) · Sales Tax & Tipping ($) |
Choosing Between T-Mobile, Verizon & AT&T Networks
The United States is served by three nationwide 5G/LTE networks: T-Mobile (fastest 5G speeds in major cities and offers an official 'T-Mobile Prepaid eSIM' app for $40–$50/30 days), Verizon (widest rural coverage across Western highways and national park gateways), and AT&T. Travel eSIM providers (Airalo, Holafly, Nomad, Ubigi) roam on T-Mobile and Verizon/AT&T for $15–$35.
Always Download Offline Maps Before Entering National Parks
Inside Yellowstone, Yosemite Valley, Zion Canyon, Death Valley, Big Sur (Highway 1), and large stretches of Route 66, cellular signal drops to zero for 40 to 100 miles at a time. Before leaving hotel Wi-Fi, open Google Maps or Apple Maps to download offline rectangular regions for your entire road trip, and download your park into the official NPS App (offline mode toggle).
Key Takeaways & US Travel Tips
- Verify current entry rules on official U.S. government portals (esta.cbp.dhs.gov, nps.gov, recreation.gov).
- Use our interactive US Sales Tax & Tipping Calculator ($), National Parks Pass Calculator ($80), and Amtrak Rail Calculator.
- Save offline maps and our printable American English & Dietary Allergy Show-Cards before departure.
Frequently asked questions
アメリカのeSIM・プリペイドSIM比較（T-Mobile・Verizon・AT&T）＆オフライン地図 (2026/2027)?
空港着陸直後から使える米国eSIMの選び方、国立公園での電波状況、Googleマップのオフライン保存手順。
USD ($) Sales Tax & Tipping?
Prices in the United States exclude state sales tax (0%–10.25%) and 18%–22% sit-down restaurant tipping.
Which US calculators help with アメリカのeSIM・プリペイドSIM比較（T-Mobile・Verizon・AT&T）＆オフライン地図?
Does this guide cover all 50 US states?
Yes—all 50 US states, Washington, D.C., and 10,714 cities are covered.
Official sources & further reading
Rules, prices and schedules change. Confirm details here before you travel: