[hovatek]

If you accidentally deleted a system app or file like SMS, radio, contacts, phone etc from the /system folder and wish to restore it the here's how to go about it:

Note: This guide assumes the phone is still rooted, able to boot to home screen, install apps and you have apk(s) you'd uninstallled

1. Get the file(s) / app(s) you wish to restore 
   
2. Copy the file(s) / app(s) to the phone's memory card
   
3. Install ROM Toolbox Lite (download @ https://play.google.com/store/apps/detai...ty.toolbox) on the phone
   
4. Launch ROM Toolbox and grant Super User permission
   
5. Select Root Browser in ROM Toolbox 
   
6. Scroll down to Sdcard and select it
   
7. Locate the app(s) / file(s) copied to the SD card, longpress and select copy
   
8. Press the green arrow button at the top to exit the Sdcard directory
   
9. Open the /system/apps folder
   
10. Paste the app(s) / file(s) into the apps folder
    
11. To set file permissions, long press the file and select Permissions
    
12. Reboot the phone
    
    
13. Note: You can use the same method to replace files on other directories.
    

Important Notice
You could also ADB @ https://www.hovatek.com/forum/thread-691.html or flash the stock system.img