Sony XPERIA Z Ultra is first Sony Mobile phablet. This phablet has very large fullHD display, powerfull quadcore CPU from Qualcomm, 2 GB RAM or 8 megapixel camera. Phablet is also water resistance. Below you can find the latest firmware for the phone.
First of all one important thing – before you start to do anything with your phone, do the backup of your personal data. It is only for your safety in case that something goes wrong or any mistake happens. In that case you can use the backup to restore the data and try to do everything once again. Each tutorial has been done many times to verify its propriety, so just read carefully all instructions and continue step by step. The major part of every file has been created by myself and every file has been tested on the corresponding phone. In this guideline related to the Sony XPERIA Z Ultra you can find some photos and videos showing how to proceed, but the most important thing are the below written manuals. All referenced files are determined for Sony XPERIA Z Ultra C6833.
Install firmware for Sony XPERIA Z Ultra
a) download and install latest Flashtool
b) download OS for your Sony XPERIA Z Ultra (you can choose from list below)
b1) Android 5.1.1 for Sony XPERIA Z Ultra C6833 (14.6.A.1.236)
b2) Android 5.0.2 for Sony XPERIA Z Ultra C6833 (14.5.A.0.270)
b3) Android 4.4.4 for Sony XPERIA Z Ultra C6833 (14.4.A.0.108)
b4) Android 4.3 for Sony XPERIA Z Ultra C6833 (14.2.A.1.136)
b5) Android 4.2.2 for Sony XPERIA Z Ultra C6833 (14.1.B.2.257)
c) open the XPERIA Flashtool, click on flash and choose downloaded firmware, than click ok. Important – if you do not want to delete any data of your phone, just uncheck flashing userdata.sin file. All data will remain in your phone, but sometimes it can cause additional troubles. So it is better (and I recommend that) to do the backup of your personal data, than proceed with clean instalation and then restore your personal data.
d) turn off your phone and when Flashtool shows pop up window, connect phone to PC with holding volume down button
e) after few minutes all is done and your phone gets the new firmware