US eSIMs, Prepaid SIM Cards (T-Mobile, Verizon, AT&T) & Offline Maps

Last reviewed: October 25, 2026 · Prices in US Dollars ($ USD) are approximate and for orientation only.

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.