Do you cave and use both hands? Do you take the chance and try to use them one-handed when more actively using them? Or do you ultimately submit and get an accessory to kinda help, at least with keeping a hold of them?
Edit:
l o n g f i n g o r
b i g h a n d
a few other answers:
just use both hands, get an accessory, and/or balance on pinky and develop the toughest pinky imaginable
bonus:
find some smol phone you like and savor it for as long as it works
big hands make 6.7 inch phones seem small