یوآی‌کیو

thumb|200px|Sony Ericsson P800, the first device running UIQ to ship. In this device, UIQ runs on top of Symbian. UIQ (formerly known as User Interface Quartz) is a discontinued software platform based upon Symbian OS, created by UIQ Technology AB. It is a graphical user interface layer that provides additional components to the core operating system, to enable the development of feature-rich mobile phones that are open to expanded capabilities through third-party applications.