UIQ Technology, which uses Symbian OS, licenses the UIQ user interface and application development platform to mobile phone vendors worldwide. Sony Ericsson is already a licensee of UIQ Technology, and has been working closely with the company on UIQ version 3.0, which is included in Sony Ericsson's P990 smartphone, M600 messaging phone and W950 Walkman phone.

UIQ Technology will operate as a separate business subsidiary of Sony Ericsson. UIQ on Symbian OS will continue to be openly available, licensed on equal terms to all its licensees.