Our first priority is to serve our customer’s need. After purchasing product you will get all documents that and we will provide full assistance if you are facing any difficulties to use the product. Product return, and cancelation is not allowed after getting the product on hands. In case of defective product, Tech diversity will take full responsibility. Customer can substitute the product before unboxing it. If customer changes the order after getting product on their hand, they will bear transportation cost of substituting the product.