Recent legislation has made this easier, especially if the phone is more than a year old. If your device is technologically compatible with a network in your destination country, unlock it and purchase a prepaid SIM from a local carrier when you land. Check to see if your carrier offers a deal for your destination. The majors post lists of supported countries online. Suss out your monthly usage and get the data package that meets your needs. They start at around $30 and include unlimited or very cheap texting.
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