A few days back Sony acknowledged the issues on original android 4.4.2 KitKat 14.3.A.0.681 firmware rolled for Xperia Z1, Z Ultra, Z1 Compact like sound coming from hearing speaker instead from external speaker, heating issues, battery drain and promised to being a firmware update to fix those issues, it seems now 14.3.A.0.757 firmware update is rolling as new KitKat bug fixing update for above mentioned handsets.
14.3.A.0.757 firmware is a bug fixing update over 14.3.A.0.681 firmware which keeps Xperia Z1, Z Ultra, Z1 Compact on android 4.4.2 only. 14.3.A.0.757 firmware is confirmed on Xperia Z1 C6902, C6903 in regions India, Austria, Germany, Hungary, Netherlands, Poland, Slovakia, Sweden. 14.3.A.0.757 firmware is available over PC Companion and SUS, no OTA seen yet. It is a huge 1023.5 MB update if updated via PC Companion or SUS.[ UPDATE - 9 April ]
Xperia Z1 14.3.A.0.757 firmware update
Connect your Xperia Z1 to PC Companion and look for a notification as shown below, proceed as per on screen instructions.
168 applications are optimized in this 14.3.A.0.757 firmware update, you will see it as soon as firmware is finished installing first time.
Download Xperia Z1 14.3.A.0.757 firmware ftf
#For C6903 LTE Euro
[ Via XDA user - auras76 ]
We will soon post other regions 14.3.A.0.757 firmware ftf and detailed changelog. If you have also got the 14.3.A.0.757 firmware update on your Xperia Z1, let us know what changes you noticed. Drop your comments below.