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Droid RAZR users reporting “SIM Authorization Error” messages
Users who have called Verizon have been told that there is a problem right now and that replacement SIM cards are being sent. Some suspect it could be Verizon’s system’s problem rather than a hardware problem, but for now if you are experiencing such issues, you might want to give Verizon’s customer service a ring to find out what’s going on.
If you suspect it could be a network issue rather than a hardware issue, perhaps you could wait it out a day and see if anything changes, other than that there appears to be no workaround solutions for this problem. You can check out the list of complaints on the AndroidForums.