The possible reasons are as follows:

1. Check the email is in your trash can.

2. Please change another email address to register again, EX: gmail、hotmail、163、qq、etc

Setup routers to a 2.4GHz Wi-Fi network

QR code cannot be recognized, the possible reasons are as follows:

1. Mobile phone screen resolution is too low

2. Screen is too dark

3. Too far from the lens

4. Reflection

Suggestions:

1. The phone screen is facing the lens

2. Adjust phone screen brightness

3. Adjust distance between the phone and the lens