Most hotels now have ID phones in rooms and it is possible to send faxes from hotels and post offices although these services are expensive. It may not always be possible to make international calls in remote areas.
If you have worldwide coverage, you can bring your own mobile phone and use it to make domestic or international calls. Check with your mobile phone provider for the costs before using it abroad as you may have to pay for listening or dialing as well
Internet: Most of the hotels in the cities connected to the Internet. Some of them have wireless broadband access in rooms or public areas. Cyber cafes are becoming popular and are easily found in major towns and cities. Prices are reasonable, usually below US$1 per hour. In many Internet cafes, you can buy pre-paid international phone cards to dial from a computer to a landline or mobile phone worldwide. Most Internet cafes are equipped with web cams, headsets and microphones.
Postcards are sold at all main tourist sites and stamps are available from post offices and some hotel reception desks. A postcard to Europe costs VND 9,000 to send and takes up to two weeks to reach the country of destination.