In the simplest terms, it is a phone that can do many things that a plain cellphone cannot do
Yes, it clocks in at .44" thick and is the thinnest smartphone in the world. However it is not the thinnest phone
nokia brick
yes, it is a smartphone.
Huawei itself is a brand. Except for Smartphone products, Huawei is the biggest telecom and network equipments products manufacturer in the world.
Yes, it is a smartphone.
The Nokia 6030 is not actually a smartphone. You can learn more about smartphones at this website : en.wikipedia.org/wiki/Smartphone.
Nokia currently has the most smartphone users but Apple is taking over with iPhone.
The iPhone 4S.
smartphone
Yes it is a 3G smartphone.
Yes, the Samsung Intercept is a smartphone.
Your question is unclear, but to attempt an answer, people use the internet and smartphone to connect with each other, gain information and stay informed about what is going on in the world.