If you want to be able to keep in touch with home then buy a local SIM card for your mobile phone (make sure you're phone is unlocked). Texting is very cheap and if you buy an international SIM then making calls is very reasonable too. Getting a SIM card is easy and inexpensive. Be prepared to give a photocopy of your passport plus possibly a passport photo (some places will take a digital one for you) as this is required for the registration process.