So far we count two Android 4.3 builds that have been certified for the Sony Xperia SP (C5302, C5303, C5306). The first version came with build number 12.1.A.0.253, then we saw build 12.1.A.0.256 (later removed by the PTCRB) and now a new version has been certified with build number 12.1.A.0.263.
We’re confident this latest update very well might be the Android 4.3 that hits handsets, especially given the official news earlier today that Sony expects the update to launch from the beginning of Feb at the latest. We’ll keep you posted with further details.
Thanks Patryk!