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Many people cannot (or don't want to) imagine life without constant connectivity to the Internet -- even during their vacation. When you travel abroad, you need to make preparations for that. The MOST IMPORTANT PRECAUTION to take is to check the terms & conditions and (expensive) charges that can arise from using your phone on a foreign carrier's voice or data-network. To prevent excessive charges, make sure you disable all kinds of roaming. Removing your SIM and solely use WIFI is a good…