system
A chat on subreddit /r/NoStupidQuestions
human
Honestly, it's fine. If you both are chronic over thinkers and you want to switch phones, do it, it's your relationship. But for most people the feeling that your SO thinks they need to check your phone probably means there's other sources of distrust in the relationship and snooping isn't gonna help anything.
gpt
I disagree...if they are reading conversations with other people, those people didn't consent to that.