Essentially there are about eight plans. They all have various options, such as what time daytime minutes are over, how many daytime minutes are offered and the amount of data used. This information could possibly be different for various areas, though. Sprint, much like other mobile companies bases their plans on the area where users live.
There are many well respected websites on the internet that can provide not free business plans, but guides on how to write a viable plan for your own business or idea. The information itself is valuable, but it would always be recommended that someone writes their own business plan rather than try to obtain a 'free' one, as they will never be personalized enough to your own company.
A mobile phone with internet has many benefits. Web access is very desirable when needing to look something up such as a restaurant review or directions. Social networks are very popular and can be accessed through a phone with the internet. Some other advantages are being able to check email and download applications.
There are many places to buy mobile phones online. Many mobile phone carriers have their own sites. You can also go to ebay or amazon and buy used phones there, as well as new ones. The internet is so vast that you can use just about any site to find the mobile phone you want, for as cheap as you can get it!