Responses
I chose “did you look through my phone?” because I thought it was connected to a later conflict about something doohyun is hiding on his phone. korean often leaves out the subject, and “…핸드폰을 봤나” doesn’t clearly state who saw the phone or whose phone it is, so I interpreted it from context. If the official english says otherwise, I’ll correct it.

I think there's a translation error happening here with the phone... dohyun's saying "did you check your phone"- your as in wooyeon-