There are three categories of mobile phones: basic phones, feature phones, and smartphones. Smartphones are equipped with a QWERTY keypad. The mobile phone is primarily a communication device that uses voice, SMS, or MMS.
Basic mobile phones are the very base models of mobile phones that have only the voice calling and text messaging capabilities. Feature phones are those which have features over and above basic mobiles but are not as advanced as the smartphones.
A GSM phone is a type of mobile phone that uses the Global System for Mobile Communications to send and receive phone calls. This is one of the two main standards for mobile communication in the world, with the other being Code Division Multiple Access (CDMA)
What is difference between mobile and smartphone?
A mobile phone and a smartphone are both mobile devices which you can use to call and text. The options for a mobile phone mainly end there, apart from the models that have a camera. A smartphone has all sorts of extra functions, like internet access, the option to download apps, and a better camera.