A mobile handset, commonly known as a mobile or cell phone, is a portable electronic device designed for wireless communication. It serves as a primary means for users to make voice calls, send text messages, and access various mobile services, including internet browsing and mobile applications.

A handset typically features a display screen, which is often a touchscreen for user interaction, along with a keypad or buttons for dialling and navigation. Powered by rechargeable batteries, these devices come with an operating system running on platforms like Android or iOS. 

Connectivity options are a vital aspect of mobile handsets, supporting Bluetooth, Wi-Fi, and various mobile data generations like 3G, 4G, or 5G. These features enable wireless connections to other devices and access to the internet. The devices also include internal storage for apps and files, as well as external memory card support in some cases.

Mobile handsets also include audio components like speakers and microphones for calls, media playback, and voice commands. The diverse range of mobile handsets caters to different user needs, from basic feature phones to advanced smartphones with a multitude of functionalities and innovative applications.