Post [Q]how to unlock spreadtrum device

I want to unlock my spreadtrum(tesveden t101) android phone.
Actually,phone is asking for gmail id and password which is done by try many patterns lock.
i tried by putiinggmail id but in vain.
And while i press VOL DOWN and POWER BUTTON. exclamation mark occurs as shown in attached picture.
USB Debugging is not on that is main disadvantage of it.
So ,i tried to use p2p adb tool by githib.

In this tools i tried it in backtrack r5 but in this os i am unable to add adb to $path by export command in terminal
this tool use adb in path which i can't able to add it.
then i use it in windows by using cygwin where it gives error to add busybox in PATH. But busybox is an apk app how it can be added to windows path.
Then i try to use this tool in another android phone and cracking by using otg cable.
But By installing busybox in unrooted new device of xperia m it wants permissions,so i install superuser, but it doesn't pop up in busybox app to give it permission,how can i configure superuser to give busybox permission to install its resources.

Now i fed up of this problem,Then i choose to take help from xda forum,
So here i am.
Anyone,please help me
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