A SIM card (which stands for "Subscriber Identification Module") is a small circuit board inserted into a mobile phone which allows it to communicate with the cell towers of local carriers, and getting a locally based SIM card allows travelers to use their phones without outragenous roaming charges. Of course, when it comes to Europe, the world's most popular destination, the "roam-like at home" rule of the European Union became operational in June of 2017, according to which service providers are prohibited from charging customers roaming fees - meaning getting a local SIM card has become somewhat less attractive. In addition, many carriers in the United States and other countries now offer international plans at competitive rates.

Read more in Tripatini contributor Rohy Jones´ post Why Getting a SIM Card Is the Best Option for Travelers Looking to Stay Connected.

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