North America eSIM

eSIM Travel Tips for North America

1. 01

   US National Parks Often Have No Coverage

   Many of America's most famous national parks have limited or no mobile coverage inside their boundaries. Grand Canyon's South Rim has partial AT&T and T-Mobile coverage. Yellowstone has very limited coverage at some lodges. Yosemite Valley has partial coverage. Death Valley has no coverage in most areas. Download offline maps, trail guides, and your campsite GPS before entering any national park.

2. 02

   Canada's Trans-Canada Highway Has Coverage in Towns

   Driving the Trans-Canada Highway from Vancouver to Toronto or beyond has mobile coverage at all towns and most highway service areas. Remote stretches of the highway through British Columbia mountain passes, northern Ontario boreal forest, and Manitoba prairies have gaps. Download offline route guidance for any long-distance Canadian highway drive.

3. 03

   Mexico's Cancún and Los Cabos Are Fully Covered

   Mexico's main tourist resort corridors (Cancún, Playa del Carmen, Tulum, Los Cabos, Puerto Vallarta, Mazatlán) connect to Telcel and AT&T Mexico 4G networks. The Riviera Maya beach strip is well-covered. Inland Yucatán cenotes and ruins like Chichén Itzá and Cobá have reasonable coverage. Remote jungle areas and indigenous highland communities have more limited signal.

4. 04

   Alaska Has Significant Coverage Gaps

   Alaska is accessible on US plans but has major coverage gaps. Anchorage and Fairbanks have solid AT&T and GCI coverage. The Denali National Park road, the Dalton Highway to Prudhoe Bay, and most of Alaska's wilderness have no coverage. Download offline maps and file trip plans before any Alaska backcountry travel.

5. 05

   US-Mexico Border Crossing Switches Smoothly

   Crossing from the US to Mexico at busy crossings like San Diego-Tijuana, El Paso-Ciudad Juárez, or Laredo-Nuevo Laredo, your HelloRoam eSIM switches to Telcel coverage automatically. Border crossings can have congested networks due to high foot and vehicle traffic. Toggle airplane mode after crossing to force a clean connection.

6. 06

   Subway Coverage Varies by US City

   Not all US subway systems have mobile coverage. New York City's MTA subway has been installing coverage but remains incomplete in some tunnel sections. Washington DC's Metro has good coverage. Chicago's L train runs mostly above ground and has coverage. San Francisco's BART has coverage at stations. Download offline maps for any city you plan to navigate by subway.

7. 07

   Emergency Number is 911 in All Three Countries

   911 is the emergency number in the United States, Canada, and Mexico. This covers police, fire, and ambulance in all three countries. In Mexico, additional emergency numbers vary by state. 911 works from any active eSIM in all three countries.