unlock gmail or factory reset KARBONN A10

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HEY GUYS here I post two way to unlock gmail or factory reset
IMPORTANT THINGS ARE WHY SECOND WAY ??
MANY TIME USB JACK OR NOT WORKING OR FASTBOOT MODE NOT WORKING
(i faced that problem usb device not regoniesed )

1> the old way

prees Power + volume up button here as you show this picture
select fastboot and use android tool for unlocking or reset

[IMG][/IMG]

2> New way (when usb not work or not delected in pc)

prees power + volume down button (when some text show in other likes china langues, release both button)

[IMG][/IMG]
and select 3rd line using volume button for up and down
and prees HOME or MENU button On touch Screen
NOW Phone restart
Phone Unlock
BEST OF LUCK

(I am using this trick On only karbonn A10)
If U like my post press thanks