iOS is the mobile operating system that runs on Apple’s mobile devices, i.e. iPhones and iPads. It’s the main software that allows you to interact with your Apple phone or tablet. iOS is the first thing you see when you power up your device, in the form of your phone or tablet’s lock screen and desktops (which are filled with shortcuts to your favourite apps).
Keep your device juiced up. Turn on battery saver mode to help your battery last longer. Learn More. Open your device's Settings app. Tap "Battery." Tap the menu with three dots at the top right of your screen, then tap "Battery saver." At the top of your screen, set the switch to 'on'.
A personal digital assistant is a small mobile device that provides computing and information storage capabilities. The PDA was a smartphone precursor. A personal digital assistant is a small mobile device that provides computing and information storage capabilities.
"Mobile device" is a general term for any handheld computer or smartphone. The term is interchangeable with "handheld," "handheld device" and "handheld computer." Tablets, e-readers, smartphones, PDAs and portable music players with smart capabilities are all mobile devices.
The Symbian OS is the operating system developed and sold by Symbian Ltd. The OS is used primarily by Nokia with its S60 user interface and by Sony Ericsson with its UIQ user interface, but the Symbian OS is also used by a number of Japanese mobile phone manufacturers for handsets sold inside of Japan.
1 The availability of Windows 10 Mobile as an upgrade for existing Windows Phone 8.1 devices will vary by device manufacturer, device model, country or region, mobile operator or service provider, hardware limitations, and other factors. 1.4 GB or greater download required.