What is Mobile device?
{{nosources|date=September 2009}} {{Multiple image | align = right | direction = horizontal | caption_align = center | image1 = Android Foldable Phones.jpg | image2 = Android Foldable Smartphone.jpg | footer = Foldable smartphones using [[Android (operating system)|Android operating system]] | total_width = 350 }} [[File:Smartwatch & Smartphone.jpg|thumb|Smartphones and smartwatches]] A '''mobile device''' is an electronic [[electronic component|device]] which its user can easily carry with them. Typical examples are a [[mobile phone]], [[Personal digital assistant|PDA]] and [[Handheld game console|handheld game consoles]]. Mobile devices do not need an external [[Electrical power|power supply]] to work.<ref>{{Cite book|url=https://books.google.com/books?id=B6lKAgAAQBAJ|title=Learning Mobile App Development: A Hands-on Guide to Building Apps with IOS and Android|last=Iversen|first=Jakob|last2=Eierman|first2=Michael|date=2014|publisher=Pearson Education|isbn=978-0-321-94786-4|language=en}}</ref><ref>{{Cite news|last=Markoff|first=John|date=1999-05-01|title=Mark Weiser, a Leading Computer Visionary, Dies at 46|language=en-US|work=The New York Times|url=https://www.nytimes.com/1999/05/01/business/mark-weiser-a-leading-computer-visionary-dies-at-46.html|access-date=2025-03-01|issn=0362-4331}}</ref> Usually, they have a [[battery]] to hold [[electricity]] to work without electric [[wire]]s. A user can change, send and move [[Information|data]] by connecting to a [[modem]] or [[cable]], or more often [[wireless]]ly. Mobile devices can be tracked by using mobile radio signals between different mobile signal towers by using GNSS.<ref>{{Cite web|last=APP|date=2024-12-15|title=App for tracking stolen cell phones unveiled|url=https://tribune.com.pk/story/2516041/app-for-tracking-stolen-cell-phones-unveiled|access-date=2025-03-01|website=The Express Tribune|language=en}}</ref><ref>{{Cite news|date=2005-08-03|title=Tracking a suspect by mobile phone|language=en-GB|url=http://news.bbc.co.uk/1/hi/technology/4738219.stm|access