Hello everybody. I got interested about this problem since my friends
@Yahia Angelo and
@corsicanu got the "Only official released binaries are allowed to be flashed" problem, so I decided to search deeply about this. Find out that this problem isn't related to FRP/OEM Unlock (even if enabled same problem comes), but to a new prop that you can see in Download Mode (RMM State: Prenormal). By searching in system, seems this prop is related to a new "thief" protection Samsung added in latest firmwares. Let's make an example: you get the device, setup Google Account, all good... then someone steals the device and wipes it... ok. After wipe he boots, but he can't pass the setup without internet, and when he connects to internet it asks for your Google account, since your account is saved in FRP partition, so he can't setup. This RMM State is more than that simple FRP, as it doesn't allow him to flash custom binaries to remove FRP. So now let's cut to the chase: who still doesn't have this RMM lock can avoid to get the device locked by following these two simple steps:
1. In build.prop, make sure "
ro.security.vaultkeeper.feature" property is set to 0, like this:
Code:
sys.use_fifo_ui=0
ro.wsmd.enable=true
ro.security.vaultkeeper.feature=[COLOR="Blue"]0[/COLOR]
keyguard.no_require_sim=true
ro.carrier=unknown
2. Remove Rlc app. To do this go in "/system/priv-app" folder with a root file manager or with twrp file manager and remove "Rlc" folder.
For those who unfortunately has RMM State set to "Prenormal", as
this user reports, seems that by keeping your phone running without shut it off/reboot, at a certain device running time value RMM State prop will set again to "Normal", so you can flash custom binaries again, if it works to you make sure to follow the above steps to not get locked again, I'll keep you guys updated about this when there will be news.
EDIT:
In attachments now you can find a zip that does the job for you. So when RMM State is set back to "Normal", flash a custom recovery and then flash the zip below to avoid lock again