Sim Card rejection

[saxophone]

I keep getting a message on my BB8780 saying sim card rejected.
Please advise if there is an easy fix for this or if i need to send the phone in for repairs.
The phone is only 2 weeks old

[devnull]

KB11201-SIM Card Rejected (http://btsc.webapps.blackberry.com/btsc/search.do?cmd=displayKC&docType=kc&externalId=KB11201)