I switched to Verizon a few months ago from Sprint (by the way I NEVER got a message that all circuits are busy on Sprint, AT&T or even T-Mobile.  That being said, I have received this message 2 times today, 2 times yesterday and at lease 10 other times since I signed up with  Verizon. 

In addition, I have found that the Verizon Network is really no better than AT&T or Sprint. Especially in the areas I need it to work the most. AND !!! The price is higher ! 

Why did I switch ? False Advertisement lead me to believe that Verizon was the best.  Obviously not. 

I am stuck here in this contract another 2 years though.  I hope they get their stuff together and make it work