I had a very bad issue with my Hubsan H501S Advanced.
I had many flights with it and I could say I'm an experienced drones user and reviewer (please see my very positive review of the drone here: https://www.nicolaottomano.it/2018/03/16/drone-hubsan-x4-h501s-advanced-fpv-gps-follow-me-recensione/ )
Today I was flying my H501S in order to take beautiful video footage of italian mountains.
After less than a minute that the drone was flying, at less than 100 meters of distance, the video suddenly was totally lost and the drone stopped responding. No video and way to control it.

I was on GPS flying mode ON, and I suddenly activated the Return to home, but the drone never returned and after few minutes - during which I could do nothing but look at the telemetry on the radio control - it crashed itself in a cliff where I lost it.
Please see the image of the telemetry I got few minutes before the drone crashed.
https://ibb.co/eUcCF8
For some kind of reasons it lost totally control. The batteries were full charged on both drone and transmitter, everything was fine, there where 11 GPS satellites... it could have been a flight like many other I did before.
I think it was a fault of the drone.
I'm here to ask you what are the warranty policy for these kind of defects. Do you Hubsan replace a faulty product that was lost?
Best regards,
Nicola