Communication facilities are always improving globally. Many hotels and public places have Wi-Fi so it’s usually possible to keep in touch with home every couple of days, if you so desire. In remote places (think Mali, Serengeti or the Sahara) or on treks or homestays, you will not be able to communicate as readily. Your leader will usually give you the heads up before you leave a place so you can send a quick email or two. Phone cards are easy to get your hands on; just make sure your phone is unlocked before you travel. Or in many countries, the cheapest way to make a phone call is at an internet cafe.