We usually provide 6 months warranty since the purchase date. When you start a warranty claim, you may provide the purchase proof (receipt, etc) and the original outer cover of this product. However, you may have lost your receipt for some reason, then there is another way to define warranty period. It is up to the manufacture time in our system, we assume that the manufacture time is your purchase time.

Here is an example:

Warranty claim date:Sep 1st

Manufacture date:March 1st,then it is still within warranty;

Warranty claim date:Sep 1st

Manufacture date:Feb 1st,then its out of the warranty.