Editing Smartphone (section)

===Buttons===
[[File:TouchWiz 2013 device options.png|thumb|upright|"Device options" menu of Samsung Mobile's [[TouchWiz]] user interface as of 2013, accessed by holding the power button for a second]]
[[File:HTC_Desire_-_optic_navigation.jpeg|thumb|The [[HTC Desire]], a 2010 smartphone with [[optical trackpad]] and search button]]

Smartphones are typically equipped with a power button and volume buttons. Some pairs of volume buttons are unified. Some are equipped with a dedicated camera shutter button. Units for outdoor use may be equipped with an "SOS" emergency call and "PTT" ([[push-to-talk]] button). The presence of physical front-side buttons such as the [[home button|home]] and navigation buttons has decreased throughout the 2010s, increasingly becoming replaced by capacitive touch sensors and simulated (on-screen) buttons.<ref>{{cite web |last1=Athow |first1=Desire |title=Best rugged smartphones of 2021: waterproof, shockproof and IP68 mobiles |url=https://www.techradar.com/best/best-rugged-smartphones |website=TechRadar |access-date=18 June 2021 |language=en |date=2021-03-09}}</ref>

As with classic mobile phones, early smartphones such as the [[Samsung Omnia II]] were equipped with buttons for accepting and declining phone calls. Due to the advancements of functionality besides phone calls, these have increasingly been replaced by navigation buttons such as "menu" (also known as "options"), "back", and "tasks". Some early 2010s smartphones such as the [[HTC Desire]] were additionally equipped with a "Search" button (🔍) for quick access to a web search engine or apps' internal search feature.<ref>{{Cite web|date=2019-11-13 |url=https://www.androidpolice.com/2019/11/13/the-menu-navigation-button-has-finally-been-retired-in-android-10/ |language=en |title=The menu navigation button has finally been retired in Android 10 |author=Corbin Davenport |access-date=2021-06-20}}</ref>

Since 2013, smartphones' home buttons started integrating [[fingerprint scanner]]s, starting with the [[iPhone 5s]] and [[Samsung Galaxy S5]].

Functions may be assigned to button combinations. For example, [[screenshot]]s can usually be taken using the home and power buttons, with a short press on iOS and one-second holding Android OS, the two most popular mobile operating systems. On smartphones with no physical home button, usually the volume-down button is instead pressed with the power button. Some smartphones have a screenshot and possibly [[screencast]] shortcuts in the navigation button bar or the power button menu.<ref>{{cite web |last1=Krasnoff |first1=Barbara |title=How to take screenshots on your iPhone |url=https://www.theverge.com/21340137/apple-iphone-screenshots-ios-how-to-take |website=The Verge |access-date=21 June 2021 |language=en |date=2020-07-27}}</ref><ref>{{cite web |title=How to Take Screenshot on LG G3 (3 Methods) |url=https://www.droidviews.com/how-to-take-screenshot-on-lg-g3/ |website=DroidViews |access-date=21 June 2021 |date=2014-08-14}}</ref><ref>{{cite web |title=4 Ways To Take a Screenshot on the Samsung Galaxy Note 20 and Note 20 Ultra - NaldoTech |url=https://www.naldotech.com/screenshot-samsung-galaxy-note-20-ultra/ |access-date=21 June 2021 |date=2020-08-20}}</ref>