CELKON 97i hard format or reset to factory settings....

1.press and hold the power button    and volume up button until android image will appear(look below images)

 

2.after android image appears select the HOME button....the system shows below image...

3.now select wipedata/factory reset by using VOLUME buttons(see below image)

 

4. after select the WIPE DATA ..now press OPTIONS MENU>>>

5.in that menu select Delete all your data by using volume keys and select OPTIONS key......

NOW UR PHONE WILL BE REBOOT.....