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United States travel guide

Emergency numbers, how to stay online, and the apps locals use. Save this page before you fly.

Emergency numbers

Tap a number to call it.

Emergency911

Mobile data in United States

  • 4G and 5G cover cities and main highways well.
  • Signal can be patchy or missing in national parks, deserts and mountains.
  • Your eSIM connects as roaming on local networks, so turn on Data Roaming for it when you land. There are no extra roaming charges.

Useful apps

  • Uber: rides in almost every city
  • Lyft: rides in most big cities
  • Google Maps: directions, public transport and offline maps
  • Transit: live bus and train times in many cities

Good to know

  • Download offline maps on Wi-Fi before you visit national parks.
  • Shop prices usually do not include sales tax. It is added when you pay.

United States eSIM plans

1 GB for 7 days

$1.50

Unlimited for 1 days

$3.00

3 GB for 15 days

$4.00

See all United States plans →

Get this guide by email

We will email you this guide, plus one reminder before you fly to install your eSIM.

Stay online from the moment you land

Install your eSIM at home on Wi-Fi. Your plan only starts when it first connects to a network in United States.

Get a United States eSIM

Checked on 2026-10-22. Numbers and rules can change, so please check locally when you arrive. In a life-threatening emergency, call the local emergency number right away.