Sony rolled android 4.4.2 KitKat 14.3.A.0.681 firmware update a dew days back on Xperia Z1, Z Ultra and Z1 Compact and users have been reporting some serious bugs the then like sound coming from hearing speaker instead from external speaker, heating issues, battery drain. Sony has rolled a new 14.3.A.0.757 firmware update to fix all acknowledged bugs by them.

14.3.A.0.757 firmware is a bug fixing update over 14.3.A.0.681 firmware which keeps Z Ultra  on android 4.4.2 only. 14.3.A.0.757 firmware is confirmed on Xperia Z Ultra C6833 in regions  United Kingdom, Germany, Sweden, Singapore, Russia, Spain.. 14.3.A.0.757 firmware is available over PC Companion and SUS, no OTA seen yet.

[ UPDATE – 9 April ]

Xperia Z1 14.3.A.0.757 firmware update rolling – KitKat Bug Fixing

Xperia Z1 Compact 14.3.A.0.757 firmware update rolling – KitKat Bug Fixing

Xperia Z1 14.3.A.0.757 firmware update

Connect your Xperia Z Ultra to PC Companion and look for a notification as shown below, proceed as per on screen instructions.

If you have not got official 14.3.A.0.757 firmware update  yet on your Xperia Z Ultra, then download 14.3.A.0.757 firmware ftf from below mentioned links and flash it manually using flashtool.

Download Xperia Z Ultra 14.3.A.0.757 firmware ftf

#For C6833 Nordic regions.

Download C6833_14.3.A.0.757_Nordic.ftf
[ Via XDA user – LordManhattan ]

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 Z Ultra, let us know what changes you noticed. Drop your comments below.