I accidentally deleted my android phones system app Anyone can help me on how to restore system apps like HOME.apk, i accidentally deleted it so the phone is stuck on boot, cant go to its home, my phone is a goophone4s thanks ...
If you didn't take a backup before fiddling around with your system (which I assume is the case), you will have to get yourself the ROM (see: Where can I find stock or custom ROMs for my Android device?) and flash it to your device.

Advice for the next time you start playing with system stuff: Backup your current ROM (which can be done via Custom Recovery as nandroid backup). So in case anything goes wrong, you simply need to boot into recovery and restore that backup, which includes the entire system and your user stuff as well.