How small is mobile phones going to be in the future?

They'll probably be somewhat bigger in the near future, since they'll replace PCs, game consoles, MP3 players and who knows how many other things. In the far future, they'll probably be the size of a key chain, and use a combination of voice recognition, speech synthesis and holographic display to interact with the user.

in my opinion the cell or mobile would decrease in size as it is doing right now. i think that it would decrease a couple more sizes before it gets to a smaller than small phase. we just have to wait and see with what they will come up next.

I think that wont go to far... While the distance between our ears and mouth remains the same...

That is what drives the size of the phones..

Maybe not smaller just different

well, for all we know, they could be microscopoic.

But, we dont know so we cant tell!