Thanks for writing this excellent post. I was trying to secure my newly bought Samsung J200G after rooting and this is exactly what I needed. However, I have rather basic doubt, If I use custom recovery with a locked bootloader, how can the recovery boot ? As per android secure boot specifications, a locked bootloader will check the Recovery for being signed by Manufacturer's key. If the recovery is not signed by Manufacturer's key then I can't boot it and the update process will get stuck.
I tried all the steps on my samsung J200G and after relocking bootloader, I get the error that "FRP lock is on, can't boot custom ROM" while booting into recovery. Is there something that I'm missing in these steps ?
Problems in booting custom signed recovery
However, I have rather basic doubt, If I use custom recovery with a locked bootloader, how can the recovery boot ?
As per android secure boot specifications, a locked bootloader will check the Recovery for being signed by Manufacturer's key. If the recovery is not signed by Manufacturer's key then I can't boot it and the update process will get stuck.
I tried all the steps on my samsung J200G and after relocking bootloader, I get the error that "FRP lock is on, can't boot custom ROM" while booting into recovery. Is there something that I'm missing in these steps ?