Not correct! Firmware Download GT-I9301I for Region XEO (Poland)
H o w e v e r, /e/OS-R 1.10 will not work with this or other Stock firmware version because the device must be explicitly equipped with bootloader version I9301IXCUARA1 and MODEM/CP Version: I9301IXXUAPG1
Special requirements
Caution: Your device must be on bootloader version: GT-I9301I = I9301IXCUARA1 / … otherwise the instructions found in this page will not work. The current bootloader version can be checked by running the command getprop ro.bootloader in a terminal app or an adb shell from a command prompt (on Windows) or terminal (on Linux or macOS) window.
It’s not complicated at all! You are making it unnecessarily difficult for yourself by not following this /e/OS documentation
Install the only properly functioning stock firmware for region COS (Greece) via HEIMDALL or ODIN, then recovery-e-1.10-r-20230415279828-dev-s3ve3gjv.img and finally Custom ROM /e/OS-R e-1.10-r-20230415279828-dev-s3ve3gjv.zip.
There is nothing more to do. Happy flashing!