Should I report this?

A girl entered the room and I think she had 2 phones on her. I saw her place a phone in the box where all of our phones were being collected, but then I saw put something that looked like a phone in her pocket, I couldn’t really see what it was because I was far away (The proctor was standing outside of the room btw). I thought it could have been an id or calculator, I’m not sure.

Should I report it or not because I’m not 100% sure if it was a phone or not.