Not only are there choices as regards cell service, you can also choose the kind of software you want to work with, there are the popular options of the android and IOS versions depending on what you like as a person. Truth be told, present day technology and functionality as far as business.
Screens were tiny, with a choice of two colors and polyphonic ringtones. Most mobile phones before 2001 did not have a camera, so it was strictly business. Today, there is a huge difference in what is available. Not to mention the fact that the mobile phone industry is a huge one which contributes .
The first generation of mobile phones were rather large and heavy, not really befitting of the 'mobile' status. The cell service was not great either, we have gone from 1G to 2G and 3G, neither could you retain a lot of data. You are now faced with options of how many mega pixels.
It is a common occurrence to see a long queue the night before the new version of a phone is released. Cell phone manufacturers have different exchange packages within which someone can get to use the latest version of cell phones available. In fact, people now add 'social media savvy' as a skill on their resume.