Again UIDs... this table is found into the official SonyEricsson document "Developers Guidelines - UIQ and personal-Java for P800/P900" released in October 2003. 101f617b UIQ 2.0 compatibility (currently P800 only) 101f80be P800 and P900 platforms (and maybe P910/Layla) 101f61ce UIQ 2.1 compatibility (currently P900 only) 101ffb35 P900 platform only Therefore, next release of "P900 UIQ SDK for Linux" (I do not plan to release it soon) will use the "0x101ffb35" default platform UID.