After the last upgrade, kit kat, my Samsung Galaxy S III is not working properly. Whenever Verizon offers an upgrade, the phone work slower. Call customer service and the solution they offer is BUY A NEW PHONE. I had said it once and I did not believe but I am starting to believe it's true. The upgrade slower operated the aircraft for customers to buy new phones. I'm driving the possibility of imposing a class action may not be possible because they force us to buy new phones when you buy this one years ago. Unfortunate, but so customers leave.