I recently purchased an iPad Mini 4 on eBay but the seller sent me an iPad Mini 3 and I did not know this until I was getting into the registration process. So I am returning the Mini 3 and have purchased another Mini 4 to replace it. I did a hard reset on the Mini 3 to clear everything before sending it back. So, now I would like to know what I will need to do as far as registering the next one when it arrives. I don't want to end up with two iPads registered to me if it is possible. Any assistance with this issue will be appreciated.