The Sony Ericsson P990 is a mobile phone and the successor of the Sony Ericsson P910. The phone uses the UIQ 3 software platform, which is based on Symbian OS 9.1. During development, the phone was codenamed Hermione, after the Harry Potter character of the same name. It was introduced on 11 October 2005, but had a long delayed market release only in August 2006.