Gadget: Cellular Phone
This phone has myriad uses, from a simple lock pick built into the antenna, to an exotic touch pad remote control for 007's luxurious BMW hidden within the phone.
Features also include a powerful taser and a fingerprint duplicator [quite a handy tool - I'm sure I could make good use of that one in my cell phone (that is, if I had one)].
007 uses this phone throughout the film and extensivly while breaking and entering (oh so much breakage) into Carver's printing facility. He uses the lock pick to gain roof access and the fingerprint scanner to get into Mister Gupta's office. Bond also uses it to help him 'take out' Dr. Kaufman as well as to escape Stamper's goons.
Once more unto the breach dear friends...