You don't need to go through her phone. You don't even need evidence. If suspect your woman isn't faithful just leave her.
Playing detective is a waste of time.
Yeah. i realized long ago its high key self degradation to do all that investigative shyt.
If u ask a chick if u can use her phone and she hesitates, even for a second, u know what they say. Where theres smoke, there is fire.
Same with u ladies and ur dude. A person with nothing to hide isnt gone try to hide nothing.
Bush them, demote them, whatever. But u can pretty much stop taking them seriously as a partner at that point.
But dont reduce urself to sneaking through their shyt or hiding in the bushes spying on them. Just note their behavior and move accordingly. Life is too short and there too many other choices outchea.