Whenever I travel on business with a laptop I always ensure I have several internet connection options so there is an alternative if a WiFi connection fails or I feel I will be overcharged for an Ethernet connection.

Mostly that means I also travel with a 3G wireless data card built-in to my laptop or as an add-on peripheral, in either USB, PC Card or PC Express Card format. These wireless modems let users connect both to the internet and to corporate IT systems over 3G cellular networks, even if no WiFi or Ethernet cable connection is available.