Third generation services are widely used in Vietnam but cell phones are becoming the target of hackers.

When mobile phone users connect to 3G networks, it is the equivalent of connecting to a LAN network but without an administrator. With traditional networks, hackers try to gain access through modems, but together with security measures provided by ISPs, they generally block hackers.

LAN networks are usually controlled by IT technicians with firewalls to prevent hackers from stealing information but 3G users do not have this security.

Nguyen Minh Duc, Director of BKIS Security says hackers can use regular 3G subscriptions to access other devices via Internet Protocol (IP) and exploit security vulnerabilities.

Duc says the 3G network in Vietnam does not have the standard configuration or safety barriers to limit the risk of intrusion from hackers.

Viettel recommends that their clients should take the initiative themselves by installing antivirus software, antispam and firewall.

Fake phone number annoy cell phone users

Most mobile service providers allow calls from internet based technology. These calls connect through an ISP, sometimes located in a foreign country.

Vietnam's mobile service providers have addressed this problem by filtering calls generated from the internet. In the case of internet calls, telephone number are displayed on the recipient's phone with national codes.

Pham Dinh Truong, Deputy General Director of Viettel says they have adopted measures to prevent fraudulent calls from abroad. Viettel also launched its Message Plus system in August after a trial period in the Central Region./.