I want to share my experience earlier at school.  When I was in the thick of the battle for my projects, I got a call from Dad.  I thought it was important because my Dad works at the other town and rarely works during class time.  So I went out to answer and ka-boom… the phone went locked. I could not resist the urge to get mad at what happened.  Why are phones supposed to lock anyway?  Are phones not meant to accept calls from all people involved, even from other networks?  I should have listened to Mom when she suggested to me before to choose from cell phones unlocked?  Phones are meant for calls and communication, not to get locked just because the caller is from the other network.