Today I was looking for the link to the new firmware, and found it and now I share with you.
Not my link and mirrors welcome
New link thanks to @devilmaycry2020
Device: Xperia TX LT29i
Build Number: 9.2.A.1.215
Customization: Hong Kong
Confirmed: New Kernel and New Baseband
General: More smooth in the UI, some lags in certain applications in landscape mode, GPU problem, I do not think it is fixed
RAM: Like the old build number, It's something that Sony should improve.
BUG FIXED: Auto shutdown when the battery is fully charged is fixed!!!
Camera: Mmmm a bit better, better than Xperia V, because I compared both devices
Multimedia: Very good in general, but sometimes the Movies app does not play some videos, the only solution is a reboot