Successfully unlocked the new Xperia 10 iii (dual sim, Android 12). Now in the flashing step, There was a problem that was really hard to solve, so I’ll add the solution here in case anyone else stumbles upon this.
There are several versions of the “Lena” – to be downloaded here Software binaries | Developer World
The right one is the one that fits to the Android version (e.g. 12). Otherwise, you get the error:
"The supported Sony Vendor partition image wasn’t found in the current directory."
Then, another error has happened coinsistently:
fastboot -s HQ61575FEE flash oem_a ./SW_binaries_for_Xperia_Android_11_4.19_v9a_lena.img
Sending 'oem_a' (819200 KB) FAILED (remote: 'Requested download size is more than max allowed
')
fastboot: error: Command failed
Flashing failed (1)
This can be avoided using the following command:
fastboot -S 512K flash oem_a ./SW_binaries_for_Xperia_Android_12_4.19_v3a_lena.img
(replace SW_binaries_for_Xperia_Android_12_4.19_v3a_lena.img with the ones that you have downloaded and copied into the sailfish folder).
P.S. the manual still recommends using “Aptoide”, as far as I have heard, it is not recommended and may not be safe. As far as I have heard it is better to first install F-Droid, then, from there, Aurora.
Note
Another hint: make sure you have the latest android-platform-tools. Having an older version may give you the error.
'Requested download size is more than max allowed
You can do this via brew install
brew install --cask android-platform-tools
Then, the standard shell script may just work fine with
sudo bash ./flash.sh
This works fine via USB-3 cable (some comments on the web say that you need USB-2)