Phone taken away forever. Is my mom being unreasonable?

So my mom found out I went on my phone when I was away for a weekend and she asked me about it and I lied. She took away my phone FOREVER and my privileges to use my car and see my friends. Did I mess up that bad? Or is she just overreacting? I'm asking this from a friends computer
Phone taken away forever. Is my mom being unreasonable?
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