i have my fingerprint set for my index when using it regular 90 percent of the time, and when on the desk i set my middle finger to slide under to unlock. 98 percent accuracy and learning on this phone. no problems with it whatsoever.
heres a tip that helps. hold down and highlight what you want to look up with long press.... such as tracking number, word, etc.... then use the google screen finder
I owned the nexus 6p .... my gripe with the fingerprint reader on the back while on the desk did bother me some.... but after testing what it would feel like.... opening the phone using your middle finger to curve around the back while it's on the desk ..... is actually a ******* ultimate...