Sony Xperia XA Ultra F3211 Update to Marshmallow Android 6.0 Stock Rom 36.0.A.2.109 Russia Generic. First of All, You Must Need to Follow How to Flash XA Ultra Stock Firmware & You can Get Original Xperia F3211 File From Below Content of this Post.
How to Update Xperia XA Ultra F3211 to Android 6.0 Stock Rom Russia Generic
Step: 1) Take a Look, check your XA F3212 firmware version If Device has Latest One Just Skip this Thread
Step: 2) Get latest Sony Flashtool version from HERE
Step: 3) paste the FTF Firmware file to folder „Which Name Firmware“ included in the XPERIA Flashtool
Step: 4) open the Flashtool, click on Install and Select downloaded firmware, then click ok. Important – if you do not want to delete any data of your phone, just uncheck flashing userdata.sin file. All device important data will remain on your phone, but sometimes it can cause additional troubles. So it is better to you (and I Suggested that) to do the backup of your Phone data than proceed with clean installation and then restore your Device data.
Step: 5) Switch off your Xperia XA and when Flashtool Display pop up window, connect phone to Computer with Keep Holding volume down button
Step: 6) After Some Minutes All procedure is Done & Enjoy Latest Firmware in Your Device
Sony Xperia Bootloader Unlock
Sony Xperia Bootloader Re-Lock
Download Marshmallow 6.0 Russia Generic Stock Firmware For Sony Xperia XA Ultra F3211
File Size: 2.01 GB