I bought my HTC EVO 4G last year and it was working perfectly fine until recently. I did the previous system update (one before the latest one out now) and now every time I go back to the main screen from using the internet or apps it shows the HTC logo as if I just turned it on. It has been freezing a lot lately and having issues unlocking. I do not know what it is and was wondering if anyone could help me with this.