How to discipline my 12 year old daughter?

My 12 year old daughter doesn't respond to punishments. She's been really disrespectful recently, she talks back, doesn't listen, ect. Punishments like grounding and sending her to her room don't work, she finds a way to entertain herself. Taking away her phone doesn't work, she doesn't really learn from it or try to earn it back. I think she's a bit old for spankings but do you thing I should start? If so, how? What position, with what, for what? I'm worried that if she continues like this her behavoiur will get worse when she's older and she'll become a out of hand teen. Any suggestions?