I gave it a first shot to flash Sailfish on my new XperiaX using the latest community build image. Unfortunately it did not work. I tried first the windows method (flash.bat) but it seems the bat file has some issues and doesn't work. I manually executed the steps on the bat file in terminal window and everything seemed to go fine. Code: F:\SONY\SailfishOS-2.1.2.3-f5121-0.0.1+master.20170125170904.537a491.15>fastboot flash boot hybris-boot.img target reported max download size of 536870912 bytes sending 'boot' (10846 KB)... OKAY [ 0.354s] writing 'boot'... OKAY [ 0.075s] finished. total time: 0.435s F:\SONY\SailfishOS-2.1.2.3-f5121-0.0.1+master.20170125170904.537a491.15>fastboot flash system fimage.img001 target reported max download size of 536870912 bytes erasing 'system'... OKAY [ 0.983s] sending sparse 'system' 1/2 (524284 KB)... OKAY [ 18.141s] writing 'system' 1/2... OKAY [ 3.845s] sending sparse 'system' 2/2 (44832 KB)... OKAY [ 1.582s] writing 'system' 2/2... OKAY [ 0.323s] finished. total time: 24.885s F:\SONY\SailfishOS-2.1.2.3-f5121-0.0.1+master.20170125170904.537a491.15>fastboot flash userdata sailfish.img001 target reported max download size of 536870912 bytes erasing 'userdata'... OKAY [ 0.542s] sending sparse 'userdata' 1/1 (0 KB)... OKAY [ 0.013s] writing 'userdata' 1/1... OKAY [ 0.011s] finished. total time: 0.571s F:\SONY\SailfishOS-2.1.2.3-f5121-0.0.1+master.20170125170904.537a491.15>fastboot flash oem xperiax_m_loire.img target reported max download size of 536870912 bytes sending 'oem' (163040 KB)... OKAY [ 5.297s] writing 'oem'... OKAY [ 21.028s] finished. total time: 26.329s After restart the phone entered to bootloop (shows SONY logo and restarts endlessly). The only difference is that I did shorten the Sony OEM blob file name... This should have nothing to do with this? There are several versions of the Sony OEM blob files available. I used the one that was mentioned in the instructions. I was able to recover it back to Android using the EMMA tool. It flashed back slightly older version (228) while the version before was 344 if I recall. I retried flashing after the EMMA tool recovery but I still get the bootloop. This time I can't even get the EMMA to recognize the phone any more... so I'll need to recover it using the fastboot only. One interesting point I noted with EMMA: It can not be used in the fastboot mode (blue LED after holding volume up key up) but only in "standard mode" showing green LED...
F:\SONY\SailfishOS-2.1.2.3-f5121-0.0.1+master.20170125170904.537a491.15>fastboot flash boot hybris-boot.img target reported max download size of 536870912 bytes sending 'boot' (10846 KB)... OKAY [ 0.354s] writing 'boot'... OKAY [ 0.075s] finished. total time: 0.435s F:\SONY\SailfishOS-2.1.2.3-f5121-0.0.1+master.20170125170904.537a491.15>fastboot flash system fimage.img001 target reported max download size of 536870912 bytes erasing 'system'... OKAY [ 0.983s] sending sparse 'system' 1/2 (524284 KB)... OKAY [ 18.141s] writing 'system' 1/2... OKAY [ 3.845s] sending sparse 'system' 2/2 (44832 KB)... OKAY [ 1.582s] writing 'system' 2/2... OKAY [ 0.323s] finished. total time: 24.885s F:\SONY\SailfishOS-2.1.2.3-f5121-0.0.1+master.20170125170904.537a491.15>fastboot flash userdata sailfish.img001 target reported max download size of 536870912 bytes erasing 'userdata'... OKAY [ 0.542s] sending sparse 'userdata' 1/1 (0 KB)... OKAY [ 0.013s] writing 'userdata' 1/1... OKAY [ 0.011s] finished. total time: 0.571s F:\SONY\SailfishOS-2.1.2.3-f5121-0.0.1+master.20170125170904.537a491.15>fastboot flash oem xperiax_m_loire.img target reported max download size of 536870912 bytes sending 'oem' (163040 KB)... OKAY [ 5.297s] writing 'oem'... OKAY [ 21.028s] finished. total time: 26.329s