Had a hard time getting my 5z too. Had to order at amazon.fr and ship to Germany :) great phone so far...
With Magisk Manager 5.8.3 the whole guide works like a charm ;)
is 7.12 the same for G930F and G935F? URL is the same.
and the DLspeed is 10kb/s :_(((( any chance for another link vor 7.12 flt G930F?