Help fixing an non branded Android Tablet PLEEEAAASSSE

Jun 8, 2013
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My colleague brought in an Android tablet to work asking me if i could help her to reset it. It was a gift for her niece who is 9 years old. Her niece has put a Pin on the device but can't remember what she set it as.
I have tried various reset methods such as holding the power button and volume +/- buttons during start up and before start up. Neither of these methods work.

I have no idea what else to do.

It is a DMG T704S
I think it's some kind of tablet from China
It only cost about ?30 but would like to get it fixed for her. :'(

Does anyone have any ideas or suggestions on how I could do this?

I know this seems like a question anyone would ask if they had stolen a device and want to wipe it for their own personal use but guaranteed it is definitely not the case.

I really would appreciate anyone's help on this issue. I have searched Google and downloaded Android multi tools etc but none of these apps are working or helping me to resolve the problem.

Thanks