New software updates for the Sony Xperia T3 (D510X) were recently certified by the PTCRB website. The LTE models (D5103, D5106) have seen build number 18.1.A.2.25 certified. This compares to the current builds: 18.1.A.1.23 (D5103) and 18.1.A.1.21 (D5106).
The HSPA+ model (D5102) has seen version number 18.1.A.2.32 certified versus the current version (18.2.A.1.18). There is a chance that this new update could signal Android 4.4.4 KitKat on the Xperia T3, but we’ll confirm either way once the updates start to roll.
Xperia T3 build number 18.1.A.2.25 certified for LTE variants (D5103, D5106)
Xperia T3 build number 18.1.A.2.32 certified for HSPA+ variant (D5102)
Thanks dif wwh!