An electronic telecommunications device, often referred to as a cellular phone or cellphone. Mobile phones connect to a wireless communications network through radio wave or satellite transmissions. Most mobile phones provide voice communications, Short Message Service (SMS), Multimedia Message Service (MMS), and newer phones may also provide Internet services such as Web browsing and e-mail.

The first handheld mobile phone was demonstrated by John F. Mitchell and Martin Cooper of Motorola in 1973, using a handset weighing c. 2 kilograms (4.4 lbs). From 1983 to 2014, worldwide mobile phone subscriptions grew to over seven billion. In first quarter of 2016, the top smartphone developers worldwide were Samsung, Apple, and Huawei, with smartphone sales represented 78 percent of total mobile phone sales. For feature phones (or "dumbphones") as of 2016, the largest were Samsung, Nokia, and Alcatel.

In Bangladesh, mobile phone are introduced to people in October 1990 by Citycell Bangladesh company. Citycell company try to do their best but they can’t long enough. After 7 years the mobile revolution in Bangladesh began in 1997 with the introduction of the Grameen Phone program. Then day by day technological change has came. People are going to introduced with the smartphone in early 2009. Some features and technology like Touch screen, polyphonic ringtones, Pixel camera, Audio Video recording with a mobile phone amazed the people. Nowadays different kinds of smartphone like Apple, Huawei, Nokia, Samsung, Xiaomi, Oppo, Symphony etc. give a sensational feature to Bangladeshi people.

Nokia X100 , Xiaomi 12T, Xiaomi 12T Pro, TCL 205, Motorola Moto E30, Lenovo Legion Duel 3, Oppo Reno6 Lite, TCL 20A, TCL X20 SE, Oppo A95, Motorola Moto G51, Symphony D76, Symphony L44, Samsung Galaxy A03 Core, Infinix Hot 11 Play, Infinix Note 11i, Vivo Y15a, Motorola Edge 30 Ultra, Xiaomi Redmi Note 11T 5G, OnePlus Nord N20 5G, Vivo Y50t, ZTE S40, ZTE S40 SE, ZTE S40 PRO, OPPO RENO8 Z, Vivo V23e, Motorola Moto Watch 100, OnePlus Nord 2 X Pac-Man Edition, Motorola Moto G200 5G, Motorola Moto G71 5G, Motorola Moto G41, Motorola Moto G31, Vivo Y54s, Symphony L33, Tecno Pova Neo, Huawei Watch GT Runner, OnePlus RT, Apple iPhone 15 Pro, Apple iPhone 15 Pro Max, Google Pixel 6a, OnePlus 10 Pro, ZTE Blade A71, ZTE Voyage 20 Pro, Ulefone Note 13P, Huawei nova 8 SE 4G, Samsung Galaxy A03, Honor 60 Pro, ZTE Nubia Z40, ZTE Nubia Z40 Pro, Xiaomi Redmi Note 11 4G, Infinix Hot 11s NFC, Oppo K9x, Tecno Camon 18T, Honor 60, Coolpad Cool 20 Pro, Samsung Galaxy S22 Ultra 5G, Samsung Galaxy A73, Samsung Galaxy S22 5G, Honor 70, Honor 70 Pro, BLU View 3, Honor 80 Pro, Realme 9i, Xiaomi 12 Lite Zoom, Vivo Y55s 5G, Infinix Note 12, Infinix Note 12 Pro, Infinix Note 12s, Infinix Note 12i, Vivo iQOO Neo 5 SE, Oppo Find N, TCL 20B, MOTOROLA EDGE X30, Motorola Edge S30, Symphony Z22, Xiaomi 11 Youth, Realme Narzo 60, Realme Narzo 60 Pro, Xiaomi Redmi K50 Gaming Pro, Samsung Galaxy Tab A8 10.5 (2021), OnePlus Nord 2 CE, HTC Wildfire E2 Plus, Honor Play 30 Plus, Vivo S12, Huawei P50 Pocket, Samsung Galaxy Tab S8 Ultra, Philips PH1, Walton Olvio MM26, Walton Olvio MM30, Philips PH2, Walton Primo GM4, Oppo A11s, Realme 9 Pro Plus