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Mobile phones support a wide variety of other services such as text messaging, MMS, email, Internet access, short-range wireless communications (infrared, Bluetooth), business applications, gaming, and photography.
Tablets
Tablets are somewhat of a cross between smartphones and laptops. They tend to have a bigger screen than smartphones and are mainly able to do everything that a smartphone can, except making calls and sending SMS. There are also some applications that only run in tablets and not in smartphones. Tablets are built to provide a rich multimedia experience and allow a user to have more computational capabilities.
Laptop
Laptop is a device on which you can perform all the tasks available on a desktop but in a mobile, light, compact fashion. It allows people to complete all the tasks they would need on a desktop but with the convenience of mobility and flexibility.