Some History and The Future of The Mobile Phone

While the transmission of speech by radio has a long history, the first devices that were wireless, mobile, and also capable of connecting to the standard telephone network are much more recent. The first such devices were barely portable compared to today's compact hand-held devices, and their use was clumsy.
Along with the process of developing a more portable technology, and a better interconnections system, drastic changes have taken place in both the networking of wireless communication and the prevalence of its use, with smartphones becoming common globally and a growing proportion of Internet access now done via mobile broadband.

The First automatic analog cellular systems deployed were NTT's system first used in Tokyo in 1979, later spreading to the whole of Japan, and NMT in the Nordic countries in 1981.

The first analog cellular system widely deployed in North America was the Advanced Mobile Phone System (AMPS). It was commercially introduced in the Americas in 13 October 1983, Israel in 1986, and Australia in 1987. AMPS was a pioneering technology that helped drive mass market usage of cellular technology, but it had several serious issues by modern standards. (wiki)

The phones seen in the above purple-blue back-ground image are phones that can bend around the wrist and are also extendable to be used as a regular phone is today. More advanced concepts exist such as the invention of a light display on the skin from a bracelet.

Projectors on skin? Why not? Large ones exist fully functional today 

In other articles I write on the future of televisions. These smart phone concepts might one day replace the use of TVs, as you could watch movies, and browse the internet just by touching a place on your arm. A step further even is making these phones multi-projectable, so as to project an interactable display on anything. Even more advanced would be a 3d display on your arm that you could feel or touch, but this concept is very unrealistic now as the technology stands.

Mixed with other technology competitively such as Circet with AR you can get more out of the experience from a head set than from a projection on your skin. Maybe the two will one day work in unison, but for now it is all up in the air.