My motorola razr phone will not work. When I turn

Hi when you take that back cover off take out the battery and look for where the sim card is located. It will be very small and slid into a little holder. Take that SIM card out and make sure that the contacts on it line up with the contacts in its Holder. If the SIM is not in right it will always tell you Insert SIM. These phones rely on that SIM Card for the Information and Other Settings they need to work properly.
If you still get that Insert SIM message then it is possible that your phone was not Programmed Properly at the Place You Bought it. Take it to them and they will fix it Free.