The smart phone is today's Swiss Army Knife, the tool of choice for almost all information technology needs. It was predicted as far back 1926 when the first Transatlantic phone call was made, by well-known Serbian Nikola Tesla. Truth be said though, he only talked about using the phone for audio and video communications, instead of the endless set of functionality it serves today!
The image above gives an idea just how many bulky things have been replaced by this tiny device that on average weighs about 250 grams! And of course there are many other tasks that the smartphone can fulfill. As most functionality is just another software application, and software updates come in over the network, your phone will become smarter over time.