I have an issue with my phone. I noticed my W705a started lagging and when I was trying to take a picture with the camera, it wasn't saving the pictures. I tried to restart my phone by turning it off and on; however, my phone now will not start anymore. The start up screen with the Sony Ericsson logo appears, but then the screen turns black and just flashes. Please help! I really like this phone and don't want to replace it. Thank you in advance.