The latest version of firmware that is certified PTCRB site for the Sony Ericsson Xperia is 3.0.1.A.0.138 Arc. This firmware in particular, was certified on May 3, although as always we have to guess what may be included for this update as compared with the current firmware (3.0.A.2.184).
However, judging from the images below, it seems that Android will 2.3.3 firmware, completely replacing the current 2.3.2 is included in Sony Ericsson Xperia Xperia Arc and PLAY. Even you can see will be released shortly after Android 2.3.4, which brings together video calling and other bug
However, judging from the images below, it seems that Android will 2.3.3 firmware, completely replacing the current 2.3.2 is included in Sony Ericsson Xperia Xperia Arc and PLAY. Even you can see will be released shortly after Android 2.3.4, which brings together video calling and other bug