Viet Nam Competition Authority (VCA), under the Ministry of Industry and Trade, has urged mobile phone users to contact service providers when they notice abnormal account activity or suspect value-added services being activated automatically.

The Vietnamese mass media recently reported the problem of "scamming" money from mobile users by automatically installing and expanding value added services, which customers may not know of or control. This has caused much concern among mobile phone users.

To check the list of value-added services, Viettel users should call the free switchboard at 18008198 or call numbers 19008198 or 0989198198, which will entail call charges.

Viettel users can also send a message by texting TC and sending to 1228 to check services they are using.

For Mobifone, consumers can call to 18001090 (free) or 9090 (VND200 per minute) or text KT to 994.

Meanwhile, VinaPhone users should call 9191, with the rates of VND200 per minute for prepaid numbers and free for postpaid numbers or text TK to 123.

For complaints, questions or advice, consumers should contact the switchboard of VCA at 18006838 (free). 

VNS