Hefty: Motorola DynaTAC 8000X (1982)
In 1973, Motorola showed off a prototype of the world's first portable cellular telephone. That phone, which measured more than a foot long, weighed almost 1kg, and cost US$3995, ultimately became commercial available in 1983. Known as the Motorola DynaTAC 8000X, its battery could provide 1 hour of talk time, and its memory could store 30 phone numbers. It may not have been pretty, but it did let you talk while on the go - if you could lift it, that is.