Today the internet is widely available throughout towns and cities in Vietnam. There is everything from trendy cybercafe’s to computer terminals in the lobbies of hotels and guesthouses, plus public internet access in many Vietnamese post offices. Many of the budget and midrange hotels in major cities offer free internet in the lobby. Some even offer free access in the room for those travelling with a laptop. The cost of internet access generally ranges from 3000d to 20,000d per hour, depending on where you are and what the competition is like. Printing usually costs around 1000d per page and scanning about 2000d a page. 

Wifi access is spreading fast. Hanoi, HCMC and other big towns have plenty of cafes and bars offering free access. Many of the leading hotels also offer wifi, but in keeping with the four or five-star tradition, it is not a free service. For laptop travellers with older machines, check out the prepaid internet-access cards that can provide you with nationwide dial up to the net. FPT is one of Vietnam's largest ISPs, and its internet card is sold in most cities. Remember that the power supply voltage will vary from that at home. The best investment is a universal AC adapter, which will enable you to plug it in anywhere without frying the innards of your equipment.

You will almost certainly be able to use your existing mobile phone on in Vietnam, assuming it is a GPRS SIM card model. You should check to see if it's locked to your home network but even then, it's cheap and straightforward to have it unlocked in Vietnam, meaning you'll then be able to use it on, any network in the World. 3G SIM card model is now more offen using in Vietnam

The three big players in the cellular market are Vinafone, Viettel and Mobiphone. Competition is fierce and there is little to distinguish between them in terms of price and coverage, so take your pick of the promotions... and there are always promotions. Calls are normally very cheap, including international rates

- Call to : Desk Phone ( IDD ) = +84 & city code & number 

Example : wish to call to 22425892 in Hanoi , do follow : +84 + 4 (Hanoi city code) +22425892 = +84 4 22425892

- Call to : Mobile phone = +84 & number 

Example : Call to 0988823458 do folow : +84 988823458 (Note: 09********** please remove 0 when you call )

- Call to : Desk Phone ( IDD ) = 0 + city code + number 

Example : call to 22425892 in Hanoi , do follow : 0+ 4 (Hanoi city code) + 22425892 = 04 22425892

- Call to : Mobile phone 

Example : Call to 0988823458 do folow : 0988823458