 In terms of software, Satio uses the Symbian OS 9.4 operating system, which is created collaboratively under the stewardship of the Symbian Foundation as "Symbian^1".It is Sony Ericsson's first non-UIQ Symbian device, after UIQ's development closed down earlier that year.It uses the PlayNow service, Sony Ericsson's mobile content platform, and is part of the company's new Entertainment Unlimited service.