Can someone help me factory reset my phone?

[ismailahmed84]

please help for reset factory setting on rooted android

Dear Sir i have Bitel B8402 Mobile and i rooted my mobile working fine but after installing of chainsfire 3d my mobile not start its show me blank screen after boot logo of android then i reset the device to factory setting the same issue phone is not booting after that i install sdk tools go abd shell i got the error closed the i start the server kill the server then type adb usb the same error is showing error closed how can i reset my android mobile please help Android v.4.2.2


pleaseeee help me