Celkon A89 Hard Reset

1. Mobile Switch off

2. Volume Down button + Power Button In 5 Sec

3. Display In Message Volume Up Key In Factory Mode

4. Click Volume up Button 

5. Display In Recovery Mode Simple

6. Touch In Home button

7. Select Wipe Data/Factory Reset

8. Ok Then Option Button

9. Select Reboot System Now 

10. Ok Then Option Button

11. Thats All

                                        (OR)

1. Mobile Switch Off

2. Volume Down Button + power Button In 5 Sec

3. 10 Sec Display Don't Touch

4. Display In Factory Mode

5. Select In Clear Flash

6. Ok Then Home Button

7. Thats All