I purchased a ZTE Merit the end of July. This was my first android so when the screen went black and froze the first time I called a phone number with an automated answering system I thought I'd done something wrong. It continued to do this randomly - I can not recreate this by deliberately calling a number I know has an automated answering system. When the screen goes black it freezes. I have touched the screen, tapped the screen, pushed the back button and have tried to power the phone off but it won't go off, even if I hold the power button down. This is so frustrating when all you can do is wait for the automated system on the other end to end the call or wait till someone eventually comes on the line. Last week I spent an enormous amount of time on the phone with a straight talk support employee. After taking my phone apart including the memory and sim card, battery, and removing the screen protector at the direction of the support person and then resetting my phone once I got it back together, the first automated call to retrieve my voice mail messages later that day caused the same problem. Since then it's happened about 4 or 5 times but I am trying not to call any numbers I think might have an automated system. I thought I had seen a post here by someone with a similar problem. I would appreciate feedback because there is clearly a problem with the phone having ruled out operator error and the need to reset it. Any thoughts?