Smartphones are not safe

You are wrong again. ‘Not supported’ doesn’t necessarily mean ‘can’t extract’, it could mean nobody uses Android 6, hence, not supported. According to a Russian spokesman (quite recently), no smart phone is immune to data extraction). Anyway, this discussion is useless: Nobody is going back to FDE. Smart phones are communication devices. They must be able to communicate, while data remains encrypted. This was not possible with FDE.