Ummmm....last time I checked....
.9 ohms is less than ONE.....thus, SUB-OHM!!

KEEP THE VOLTAGE LOW ON THE MVP2 with that coil! The MVP2 has a 3 amp limit....and although it WILL fire, you MAY be pushing the envelope on current draw!! I've never gone below 1.1 on my MVP2, but I know folks who HAVE - and ARE - running .8 coils with success...
VAPE SAFE!
Happy (vaping) Trails!