Contoling her Anger and checking my mobile (Stop it)?

Would like your advice or opinion please. I have been engaged for 3 years and wedding is soon,she has a Habit to check my mobile behind my back and she also used to have fake profiles, anyway as wedding is coming up and my friends decided to have a bachelor party so we began calling few girls and text them, one msg was from my mobile and she sow it later told her what is it about but she only believed me after few days of talking, but she cocontinuouso checking my phone, so I decided to do a test by having msgs from other gils and kept the phone inin frontf her , till i get ready, during that time i was telling her I know u are searching, any ways at night i deleted the msgs and kept the phone again inin frontf her and she checked it and the fight began, screaming breaking stuff cocouldn'told her people heard her and suddenly she began using her hands the wrong ways tried to stop her but had to hold her tight and pull her to stop. Now we currently broke up, and need your advice what to do to get things better after all what happened?