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The process of putting your sim card into your old phone when your parents take your phone because you're grounded. SIM card switching is commonly done by teens.
Teen1: "Hey!!"

Teen2: "Hey how're you texting i thought you were grounded?"

Teen1: "I did a SIM card switch and I'm using my old phone :) I'm so smart."

Teen2: "That IS smart.. I'm gonna do that next time I'm grounded!"
by LaramieT1o28 February 05, 2011
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