Verizon iPhone 5 showing SIM NOT VALID

[cellulartalk]

I have a Verizon iPhone 5 that works fine with a Cricket sim. However, when I try to insert a Simple Mobile sim (Tmobile) or an Airvoice sim (AT&T) I'm getting the message: Sim not valid ... the sim card that you currently have installed in this iphone is from a carrier that is not supported...

More... (http://www.howardforums.com/showthread.php/1871346-Verizon-iPhone-5-showing-SIM-NOT-VALID?goto=newpost)

Courtesy of WestNet Wireless
www.westnet.ca