When I secretly find that my boyfriend's mobile phone has ambiguous information with another girl, should I make it clear or what should I do? I am so bored in my heart.

Don't say it's broken Let it go. In my experience, it is. If you break it, he will feel embarrassed or annoying and irritable.

Forget it. You can care more about him in the future. Long after this incident, you are asking, who is the girl you called? Care about you for me. By this time, it is already a thing of the past. He will also be surprised that you knew before but didn't mention it, and tolerated him. He will thank you, too.