High Quality Content by WIKIPEDIA articles! The Sony Ericsson Xperia X10 is a smartphone in the Xperia series designed by Sony Ericsson. It is the first Sony Ericsson smartphone to utilize the Android operating system. The phone was shipped with Android 1.6, but an upgrade to 2.1 was made available starting October 31, 2010, with a gradual international rollout. Originally, Sony Ericsson stated that the X10 would not receive an upgrade to Android 2.2 (Froyo) or beyond, but the phone has since received an upgrade to 2.3.3 (Gingerbread) starting July 29, 2011.