We are willing to provide the return service for all products purchased directly from us with a 30-day return policy.
The Serial Number is a 16-digit number that starts with 80...You can find it on the original package box, battery cover, or the Settings page of your U home APP. e.g. 8030123412341616
Please try to be as specific as possible. For product issues, include any additional details you think may be relevant, such as troubleshooting steps you've taken.
