It is clearly stated in the passage that ----.

As many of us are familiar with computers now,
viruses are no longer new to us. But have you ever
thought that you may have to deal with viruses on
your mobile phones? Although there are no reports
of people actually seeing these viruses in their daily
use, some Japanese phone companies already
sells phones with built-in anti-virus software.
According to virus watchers, mobile phones could
eventually be susceptible to viruses because they
use operating systems that turn them into
minicomputers. There are phones for instance, that
can run Microsoft applications, like Excel. These
can be e-mailed from a computer to a mobile phone
and that opens a risk to a virus on the phone.
Worried chatters should know that security experts
this year found few viruses that target mobile
phones and they were created and contained within
labs but these cell phone viruses are not as lethal
as viruses that have attacked PCs though.