If a girl is constantly checking and using her phone does that mean she likely has a boyfriend?

Silly question but, In class, the girl I sorta like often is taking out her phone and looking at it. In most cases, does that typically mean she likely has a boyfriend.
I know she doesn't have a bf in my school but im not sure about outside of it. Thank you for any response
If a girl is constantly checking and using her phone does that mean she likely has a boyfriend?
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