You would have to contact Verizon and tell them that you would like to deactivate that cell phone and let them know you would like to give it to another person. Also your account has to be in good standing (no outstanding balance or no amout due on your account). Otherwise then your cell phone would be considered a bad esn and can not be activated ever again. The sim card has no bearing. The buyer can get another sim card for the droid 3.