Quoting ♥Jessie♥:" Yes. I agree. She should put her foot down but I don't think not allowing him access to her phone is ... [snip!] ... out her phone. IMO. I am not saying she should let him off the hook for being a douche. I just don't agree with your solution."
She feels she has to sleep with her phone under her pillow.... might as well just say "don't touch it" and get pissed if he does.
I agree with talking, but I'm sure OP already as talked about it. Women do talk, it's the first thing we think to do with our SO/DH. It's when the guy ignores the talk that we need to vent because it keeps happening... KWIM?