I have problem , i write to Sony , and they answer me.
Here is text :
Sony Mobile Communications has noted the difficulties some users have with software 4.3 on XPERIA SP.
The analysis was made and corrective measures taken.
The plan is a new version of the software that will be launched as soon as possible.
We kindly ask for your patience. Notice of the new version of the software will get the usual as well as other updates.
Sorry English is not my strong side