hacker.org

I was trying to go to sleep when an idea came across my mind. Can a Denial of Service be aimed at a specific cell phone? I am not entirely sure how such a thing would work. Or if it's possible.

Also, I have not been on here in a few months, have you all kicked Nobody off of here or have 10 more jackasses shown up to take his place?

It depends on how you define DDOS (ofcourse).
If the cellphone is connected to the Internet, there should be no problems.
Else, high-density spams of calls or/and messages should render it unusable.

A phone that's connected to the Internet, probably got an IP. Then you can distribute a denial of service, towards it.

In the second case, it should work by phone number. I think that's an untested area of cracking, and that nobody knows the effectivness of that technique, though.
The HDSPA, is the fastest connection I know of. This connection has a bandwidth of almost 8MB/sec.
If one can fill this connection with packets, the connection should definitively be useless.

Frequency jamming operates conceptually the same way and with the same effect as Denial of Service via packet flooding. It is of course illegal in the US with a fine of up to 11,000$. You may want to do a bit of research on cell phone jammers, they are commercially availible from other countries.

With a bit of work, you could mod one to be directional, if you only wanted the one phone affected. Still it probably doesnt sound like what you'd be looking for as either way it would require physical proximity.