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MiFi Card

Hotel WiFi charges can be ridiculously high — and the service is often spotty even if you choose to pay. These ultra portable cards use a phone carrier's 3G (or, in some cases, 4G) service to give travelers high speed WiFi on the road. Several carriers offer them, but Virgin Mobile's Broadband2Go MiFi 2200 is widely praised. The device costs $150, but comes without a contract, letting travelers use it on an as-needed basis for a lot less.

Photo: Virgin Mobile