I managed to buy one Xperia XA2 with Android 9 (for a second time I am trying this).
And for a second time it is unable to unlock the bootloader.
Sailfish_OS-Jolla-126.96.36.199-h3113-0.0.7.52$ sudo fastboot oem unlock 0x7660E4XXXXXXXXX ... FAILED (remote: Command did not succeed) finished. total time: 0.082s
interestingly it can read from the device
Sailfish_OS-Jolla-188.8.131.52-h3113-0.0.7.52$ sudo ./flash.sh Detected Linux Searching device to flash.. Found H3113, baseband:1311-2845_50.2.A.3.77, bootloader:1310-0301_X_Boot_SDM630_LA3.0_P_38 Found 1 devices: XXXXXXXX Fastboot command: fastboot -s XXXXXXXX Your device firmware version identifier is 50.2.A.3.77
The OS is debian buster with fastboot version
Sailfish_OS-Jolla-184.108.40.206-h3113-0.0.7.52$ fastboot --version fastboot version 1:8.1.0+r23-5 Installed as /usr/lib/android-sdk/platform-tools/fastboot Sailfish_OS-Jolla-220.127.116.11-h3113-0.0.7.52$ fastboot getvar unlocked unlocked: no finished. total time: 0.002s
I tried two different cables and the PC does not have USB3.0 port. Any idea?