Forget that "world's smallest" hokum -- how's about the world's largest? One particular Chinese man took on the challenge by constructing a fully functional cellphone some 620 times bigger than the handset that served as inspiration. The final result weighs in at 48-pounds, towers 3-feet up and has absolutely no qualms sending / receiving calls, text messages or browsing the internet. Unfortunately, the homegrown handset does require an AC outlet to function, and the real kicker is the omission of a vibrate function. Still, we bet the speakerphone is killer.