Hi bala
what do you mean by "factory reset" ?
In general you can flash new images, refer to
link below
i.MX6Q|i.MX 6Quad Processors|Quad Core|Freescale
IMX_6DQ_MFG_TOOL : Tool and documentation for downloading OS images to the i.MX 6Quad and i.MX6Dual.
Best regards
igor
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