Below are 5 of them:
(All the informations below are copyrighted (C) by its author)

1 . Nokia 888 Communicator
Nokia definitely has the most interesting concept phones. Nokia 888 Communicator is a striking futuristic concept phone. The phone, which uses liquid batteries, speech recognition, flexible touchscreen and touch-sensitive body cover,is designed by Tamer Nakisci and won the Nokia Design Award


2 . Nokia Aeon
Nokia Aeon was presented by Nokia on their website in the Research & Development section. What is so great about this phone is that it looks like it will actually go into production next February. Of course, its just a rumor, but still, makes us hope to actually see it someday in the GSM shop. All we know about it for now is that its a touchscreen phone and it looks fantastic.


3 . Sky "Sleak n Slim"
"Sleek & Slim" from SKY is another concept based on touchscreen technology. The phone has a discretely glowing touchpad, hideaway keys and generally utterly-fashionable minimalist design.


4 . Benq-Siemes "Snaked"
Benq designers thought of women too and presented Snaked. This is a "reptile" looking phone, creepy somehow, but still is very cool. The Snaked is a fashion phone for sport loving women, because it also has body monitoring sensors to help the ladies keep those fine shapes.


5 . What You See is What You Get Concept
One thing is for sure about this concept phone they could've named it shorter. Designed by Pei-Hua Hang, the phone's name comes from the fact that this concept no longer uses an LCD as viewfinder for the digital camera, instead it uses a transparent frame. And of course, interaction is made through a touchscreen