VietNamNet Bridge – More and more people Hanoi have installed cellphone wave
stimulating equipment at their homes to improve the wave quality. The equipment
have interfered with other networks, thus making telecom services useless.
About 40 different products have been available on the market sourced from
Taiwan, China and South Korea, priced at VND3-20 million, and favored by
consumers, because the equipment are believed to strengthen the mobile waves.
Wave stimulating equipment is a kind of radio equipment which receives the GSM
wave in the places where there are strong waves and then relay, amplify and
playback in the places where there are weaker waves.
The equipment have been named in the list of the products which may threaten the
safety of mobile networks. These are not popular products, and the users of
which have to be licensed by the Ministry of Information and Communication.
To date, there have been only five mobile network operators which have got the
The Hanoi Department of Information and Communication has found out from an
inspection tours that wave stimulating equipment have been at many shops, which
could now present the invoices or documents to show the origins of products. The
department has released a decision to impose a fine of VND2.85 million on the
However, the existence of the wave stimulating equipment still causes a headache
to mobile network operators.
MobiFone, VinaPhone, Viettel and Vietnamobile have repeatedly complained to the
Ministry of Information and Communication about the interference to the networks
at GSM900 and E-GSM900 waveband.
The network operators have complained that the equipments have badly affected
their service quality, leading to the high percentage of unconnected calls and
interrupting the connection between mobile phones and the base stations.
According to the region’s Center for Radio Frequency No. 1, which conducted a
survey in different areas of Hanoi, wave stimulating equipment have been used
mostly in the districts of Hai Ba Trung, Hoan Kiem and Thuy Khue and Thai Ha
The center measured the GSM900 band downlink signal and found that the mobile
network quality was weak, which could be the reason why people spontaneously
have installed the equipment to improve the wave quality.
A local resident in Dong Da district said since the mobile wave could not reach
the inside area of his home, he has to install the wave stimulating equipment to
be able to use the services.
Most of the people using the equipment said they don’t know these are the
While the low-quality wave has been cited as the reason behind the largely use
of wave stimulating equipment, mobile network operators have denied their
They said that it’s impossible to set up BTS stations in many areas in Hanoi
because of the protest of the local families. Some measures have been applied to
settle the problem, but they cannot help settle the problem to the every root.
As such, how to expand the wave coverage in Hanoi remains a difficult question
to mobile network operators. People don’t have wave to use mobile services, but
they protest against the setting up of BTS near their houses.
Some mobile network operators have given warnings on their official websites
against the use of substandard wave stimulating equipment, stressing that the
spontaneous use of the equipment is a behavior of violating the laws on radio