For hard reset need battery charge 80% up
1. Press and hold together Volume up + power key to turn On Your device.
2. when show recovery menu release all key.
3. Than use Volume down key to select Wipe Date/Factory Reset Press Power Key To Confirm.
4. Now Select Yes-- Delete All user Data Again Press Power key.
5. After Finish This Prosess Select Reboot System Now Press power key and wait few second phone will be restart