Earlier people used to ask do you have cell phone. Now a days they are asking whether you have smart phone or not. Let me differentiate cell phone and smart phone.
The main difference is that smart phone can do some basic computing whereas cell phone can't do. Cell phone is a just communication device. On other hand smart phone is combination of communication and computing device.
Smart Phone = Cell Phone + PDA (Personal Digital Assistant)
Smart phone can do almost all activities of PDA. Smart Phone offers good connectivity to Internet. We can access Gmail, Facebook, Twitter and etc. Apple's iPhone and Blackberry are leading smart phone brands in this world
