K550i K550i is a mobile phone manufactured by SonyEricsson. Latest user agents:SonyEricssonK550i/R1JD Browser/NetFront/30.3 Profile/MIDP-2.0 Configuration/CLDC-1.1(Linux LLC 1.2)SonyEricssonK550i/R1JD Browser/NetFront/3.3 Profile/MIDP-2.0SonyEricssonK550i/R1JD Browser/NetFront/3.3 Profile/MIDP-2.0 Configuration/CLDC-1.1