The phone issue is easy to fix. “We are hanging out (insert doing household chores, eating or doing XYZ), please put your phone away, honey, I want your undivided attention”. If he insists being on the phone after you ask him to put it away, then it’s a serious concern. What does he say when you tell him about his phone?

When he is accusing you of having trust issue, tell him “you lie, use my finances without permission, and are all day on the phone, flirt when we are out etc. So yes I have issue with your actions and it causes me to not trust you”

He makes it “your” trust issue.