Update by user Aug 16, 2021 It has been a hard time contacting Hubsan US. Had Contact with Hubsan China and they were horrible to deal with. I asked questions and got one answer which was no help. Then they kept asking me the invoice number. Which I dont have as it was a gift. Then the person blew me off. I finally got an email to HubsanUS . And still waiting on a reply. Its been a week. Original review posted by user Jul 15, 2021 My H501S and transmitter H906A . I keep getting gps signal lost and cannot clear it. Tried all the fixes online and in user manual Also verified I had more than enough satellites Also i cannot center my yaw control stick calibration does not work. I am so frustrated with this drone. I am also getting ready to buy a new one for my grandson. But I am about to give up on Husban. Why you ask is the impossible way to get in touch with you. I also tried updating the firmware. And I was connected to my drone the fc. And I keep getting a fail error. So what gives. Can you please give me some answers. Sincerely A frustrated customer Robert M.KLUDY rmk1949@***.com 4894 Hunt Road Apt 202 Blue Ash, ohio 45242