Image 1This layout of the camera viewfinder was first introduced by Apple with iOS 7 in 2013. Towards the late 2010s, several other smartphone vendors have ditched their layouts and implemented variations of this layout. (from Smartphone)

Image 2Optical track pad sensor of an HTC Legend, 2010. (from Smartphone)

Image 3A sign along Bellaire Boulevard in Southside Place, Texas ( Greater Houston) states that using mobile phones while driving is prohibited from 7:30 am to 9:00 am and from 2:00 pm to 4:15 pm (from Smartphone)

Image 4 Tivadar Puskás proposed the telephone switchboard exchange in 1876. (from History of the telephone)

Image 5Android smartphones (from Mobile phone)

Image 6A user consulting a mapping app on a phone (from Smartphone)

Image 7A sign in the US restricting cell phone use to certain times of day (no cell phone use between 7:30–9:00 am and 2:00–4:15 pm) (from Mobile phone)

Image 8The master telephone patent granted to Bell, 174465, March 10, 1876 (from History of the telephone)

Image 9 Alexander Graham Bell was awarded the first U.S. patent for the invention of the telephone in 1876. (from History of the telephone)

Image 10The HTC Desire, a 2010 smartphone with optical trackpad and search button. (from Smartphone)

Image 11A person using a Samsung Galaxy S3 smartphone (from Smartphone)

Image 12A Samsung Galaxy S20 Plus, featuring a "hole-punch" camera (from Smartphone)

Image 13Mobile/desktop convergence: the Librem 5 smartphone can be used as a basic desktop computer (from Smartphone)

Image 14Smartphone with infrared transmitter on top for use as remote control (from Smartphone)

Image 15The LG Prada with a large capacitive touchscreen introduced in 2006 (from Smartphone)

Image 16Old Receiver schematic, c.1906 (from History of the telephone)

Image 17The original Apple iPhone; following its introduction the common smartphone form factor shifted to large touchscreen software interfaces without physical keypads (from Smartphone)

Image 18Mobile payment system (from Mobile phone)

Image 19A Moto G7 Power; its display uses a tall aspect ratio and includes a "notch". (from Smartphone)

Image 20Scrapped mobile phones (from Mobile phone)

Image 21Inserted memory and SIM cards (from Smartphone)

Image 22A Meizu MX4 with Flyme OS (from Smartphone)

Image 23Mobile payment system. (from Smartphone)

Image 24The Huawei P30 features three rear-facing camera lenses with Leica optics. (from Smartphone)

Image 25The Nokia 9110 Communicator, opened for access to keyboard (from Smartphone)

Image 26A text message (SMS) (from Mobile phone)

Image 27Modern Apple iPhone. This phone is considered a smartphone (from History of the telephone)

Image 28 E-waste in Agbogbloshie (from Smartphone)

Image 29Active mobile broadband subscriptions per 100 inhabitants. (from Mobile phone)

Image 30A 19th century acoustic tin can or "lovers' telephone" (from History of the telephone)

Image 31Private conversation, 1910 (from History of the telephone)

Image 321896 Telephone ( Sweden) (from History of the telephone)

Image 33Mobile phone subscribers per 100 inhabitants. 2014 figure is estimated. (from Mobile phone)

Image 34A driver using two handheld mobile phones at once (from Mobile phone)

Image 35Typical mobile phone mini- SIM card (from Mobile phone)

Image 36A New York City driver holding two phones (from Smartphone)

Image 37The Nokia 9 PureView features a five-lens camera array with Zeiss optics, using a mixture of color and monochrome sensors. (from Smartphone)

Image 38Dupuis and Haug during a GSM meeting in Belgium, April 1992 (from Mobile phone)

Image 39A German rotary dial telephone, the W48 (from History of the telephone)

Image 40Actor portraying Alexander Graham Bell in a 1926 silent film. Shows Bell's second telephone transmitter ( microphone), invented 1876 and first displayed at the Centennial Exposition, Philadelphia. (from History of the telephone)

Image 41 Antonio Meucci's telephone. (from History of the telephone)

Image 43 Elisha Gray, 1876, designed a telephone using a water microphone in Highland Park, Illinois. (from History of the telephone)

Image 44 Philipp Reis, 1861, constructed the first telephone, today called the Reis telephone. (from History of the telephone)

Image 45People using phones while walking (from Mobile phone)

Image 46Cellular networks work by only reusing radio frequencies (in this example frequencies f1-f4) in non adjacent cells to avoid interference (from Mobile phone)

Image 47Several BlackBerry smartphones, which were highly popular in the mid-late 2000s (from Smartphone)

Image 48"Device options" menu of Samsung Mobile's TouchWiz user interface as of 2013, accessed by holding the power button for a second (from Smartphone)

Image 49 Martin Cooper of Motorola, shown here in a 2007 reenactment, made the first publicized handheld mobile phone call on a prototype DynaTAC model on 3 April 1973. (from Mobile phone)

Image 50Top of cellular telephone tower (from History of the telephone)

Image 51A French Gower telephone of 1912 at the Musée des Arts et Métiers in Paris (from History of the telephone)

Image 52Tooltip in Kiwi Browser, a Google Chromium derivative, reveals the full URL by hovering over the tab list using the stylus on a Samsung Galaxy Note 4. (from Smartphone)

Image 531917 wall telephone, open to show magneto and local battery (from History of the telephone)

Image 54Two decades of evolution of mobile phones, from a 1992 Motorola 8900X-2 to the 2014 iPhone 6 Plus (from Mobile phone)

Image 55A smartphone touchscreen (from Smartphone)

Image 56Historical marker commemorating the first telephone central office in New York State (1878) (from History of the telephone)

Image 57A high-capacity portable battery charger ( power bank). (from Smartphone)

Image 58 Thomas Edison invented the carbon microphone which produced a strong telephone signal. (from History of the telephone)

Image 59 IBM Simon and charging base (1994) (from Smartphone)

Image 60The Motorola DynaTAC 8000X. In 1983, it became the first commercially available handheld cellular mobile phone. (from Mobile phone)

Image 61 Antonio Meucci, 1854, constructed telephone-like devices. (from History of the telephone)

Image 62 Personal Handy-phone System mobiles and modems, 1997–2003 (from Mobile phone)

Image 1 Emergency telephones, on the Paris-Bordeaux railway line, Saint-Saviol station, Vienne, France

Image 2An Italian gettone telefonico ( telephone token) from 1945, which was used in Italian phone booths

Image 3 Push-button telephone

Image 4Automatic electric Rotary dial telephone

Image 5A historic telephone booth in Skansen, Stockholm

Image 6A Bell Canada payphone with digital display

Image 7Apple iPhones

Image 8 Landline call blocking in use

Image 9 Telephone booth box art outside the Tower of London, 2012

Image 10Acoustic telephone ad, The Consolidated Telephone Co., Jersey City, New Jersey, 1886

Image 11Mailbox and public telephone in Haßfurt, Germany

Image 12An example of a K6, the most common red telephone box model, photographed in London in 2012

Image 13Photograph of the interior of the Prairie Grove Airlight Outdoor Telephone Booth in Prairie Grove, Arkansas, which is listed on the National Register of Historic Places

Image 14 Foldable smartphones

Image 15A Western Electric candlestick phone from the 1920s

Image 16A cordless phone

Image 17A police box outside Earl's Court tube station in London, built in 1996 and based on the 1929 Gilbert Mackenzie Trench design

Image 18 Rotary dial telephone, probably from Belgium; the circuit diagram inside is in Dutch and French

Image 19A traditional North American rotary phone dial. The associative lettering was originally used for dialing named exchanges but was kept because it facilitated memorization of telephone numbers.

Image 20A Funke + Huster telephone inside the Idrija Mine, Slovenia

Image 21Public telephone, Bucharest, Romania

Image 22A Northern Electric telephone, model number N415H, circa 1950 (probably)

Image 23Historical telephone with the German imperial eagle and the heraldic shield of the House of Hohenzollern dynasty; Vollmer's Mill, Seebach, Baden-Württemberg, Germany

Image 24Track-side emergency brake and emergency telephones at the platform of the metro station Aspern Nord, Donaustadt, Vienna, Austria

Image 25 Rotary dial telephone, probably from Belgium; the circuit diagram inside is in Dutch and French

Image 26 Android smartphones

Image 27The AUTOVON was a worldwide American military telephone system that was built starting in 1963.

Image 28Wooden wall telephone with a hand-cranked magneto generator