Step 1: Contact your wireless service provider IMMEDIATELY to suspend your service and report your missing cellular phone. Note that you will be responsible for any charges incurred from the time your phone was out of your possession up until the time your service is suspended.
If you purchased a monthly insurance plan at the time you activated your cell phone, the rest is fairly painless. Your next step is to call the insurance company's customer service line within 60 days and request a replacement cell phone (most wireless providers use Lock\line or Asurion Insurance Service Inc. as their insurance administrator). Once your replacement request is approved and you pay the $35-$50 deductible, they will send you the same or a comparable cell phone with similar features and functions. If, however, you do not have an insurance plan, go to Step 2.