Download & Flash Singapore Generic Sony Xperia Z4 Tablet SGP712 Android Marshmallow 6.0.1 Stock Firmware 32.2.A.0.224 the device is slim, waterproof design is simultaneously sleek and solid. Running the latest version of Android, it features a colorful user-friendly overlay. It has a sharp HD screen, and its performance is fast and smooth.
Sony Xperia Z4 Tablet SGP712 Singapore Generic Stock Rom 32.2.A.0.224 Flash Instructions
a) First of All Just check your device firmware version if your z4 tab already run latest one just skipped this steps
b) Download Latest Version of Xperia Flash-Tool from HERE
c) Get Singapore Generic Marshmallow Android 6.0 for Sony XPERIA Z4 Tablet
d) now paste the Firmware ftf file which you downloaded in step c) to folder „Firmware“ included within the Sony Xperia Flash-tool
e) Now you can start The XPERIA Flash-tool Exe in you PC, click on Install and Choose downloaded Stock firmware, After than click on OK. Main Note: if you do not want to delete any Data of your Z5, simply unchecked installing userdata.Sin file. Now All Inmportant Data will remain in your Device, however usually it might probably reason further Issues. So it is Suggested (and that i Preferred that) to do the backup of your Device data, than proceed with Easy & Clean Flashing after then restore your Device data.
F) Power OFF your Device and when Flash-tool Suggest pop up window, connect Phone to computer with Holding volume down Button.
g) after Few Minutes All Flash Steps is Done and your Xperia Phone will get the Latest Stock Rom firmware
How To Unlock Bootlaoder Guide HERE
How To Lock Bootloader Guide HERE
Download Stock Android Marshmallow 6.0.1 Firmware FTF For Singapore Generic Xperia Z4 Tablet SGP 712
SGP712_32.2.A.0.224_R4C Singapore Generic.ftf HERE