First, confirm that your device is a Freebox Pop. Next, ensure that you have enabled Developer Options and ADB. Then, you can either install the ‘reboot to libreelec.apk’ or use the ADB command ‘adb update’.
important u should use the right dtb.for freebox pop is s905x2_2g.dtb
there are some ways for u.
https://discourse.coreelec.org/t/reboot-to-coreelec-apk
