hello guys.im trying to install twrp in my device j7 2016(sm-j710f) i have android 8.1 oreo.when i flash twrp odin says pass and i open my phone but there is the stock recovery.i read somewhere that it is because bootloader is locked.im trying to unlock bootloader via adb but in fastboot commands i get waiting for device.i have searched on the internet but nothing was working for me because when i go to the bootloader mode my phone isnt shown on device manager on pc while it makes the sound of a connected device.any ideas and another way to unlock bootloader? thanks