Idea Onetouch 985N Google Account & Pattern Lock Done

1. Mobile Switch Off

2. Hold Volume Up + Power Button In 10 Seconds

3. When You See Android logo Symbol

4. Then press  Home Button 

5. Display In Recovery Mode Option 

6. Select Wipe Data / Factory Reset

7. Ok Then Option Button 

8.  Reboot System Now Option 

9. Ok Then Option Button

10. Thats All...