[asterisk-users] Unlocking Cisco 7921

I've got a few Cisco 7921 wifi phones to use with an Asterisk pilot.  For the purpose of the pilot (i.e. low investment) I want to configure the phones from the keypad.

 

Each phone shows "settings locked!" whenever I try to edit the network profiles.  I can't seem to unlock them!  Hopefully there is a secret button combination...I would hate to have to go to a Cisco Unified CallManager just to unlock a few phones...

 

Thanks,

MD