I successfully installed the Google market, Amazon app store and rooted my sytabex7-2. Everything thing was going great until I decided to rename the phone.apk to try and improve the battery life. I was able to rename the /system/app/phone.apk to phone.bak. The tablet now boots to my wallpaper with the slide to unlock bars but I am unable to slide the bars or do anything on the screen. The "three finger" factory reset doesn't seem to work on this tablet. I am unable to determine if the touch screen has crapped out or if renaming the phone.apk caused the issue. The clock updates and the unit charges. Any help would be appreciated. Thanks.