Hey Mate, These are exactly the same issue I have. Bought the phone less than a week a go, nothing but giving me problems. It switches itself off and overheated, even when i wasn't running any application on the background. The phone is so laggy, and switched off itself often when running music or video streaming apps such as spotify and youtube. every morning it won't even receive any cellular or data from cell-provider. Only after switching off and on then the data comes back on the screen. On the fifth day, the camera isn't working. I am referring to the main camera app, not the the third party camera app. It says: 'ERROR' Camera isn't available. Its been the 7th day now. I've tried all the tricks suggested on Google, but this still not working. To tell the truth, i am a bit skeptical to believe that Sony is still making a reliable electronic products especially in smartphones industry.