@reset-button 

For camera Solid Red issue, make sure you have reset Tapo camera in the correct way:

RESET: with camera powered on , press the reset button for 5 secs and check if camera respond to the reset. 

Please check my private message try to manually upgrade the firmware for C310 and see if that helps with the issue. 

Check if Tapo camera is broadcast the default SSID.

May I know is there any power outage/ thunderstorm/unstable Wi-Fi during firmware update?

@reset-button 

I understand you are frustrated due to the device issue, and we'd like to help with your concern in a more friendly atmosphere.

May I know did you try to upgrade the firmware manually I sent by private message, does that help with the issue? 

Was there any power outage or unstable Wi-Fi in the firmware update process? If you have tried the manual upgrade but still no luck, sorry to tell you the camera should be faulty, and it is recommended to contact the retailer or local support to check warranty.

@reset-button  Hello, 

Please rest assure about the replacement,normally local RMA team will ship the replacement after the faulty unit is received,so please make sure you have shipped back the faulty unit first.It may take some time to pick up the faulty unit and ship the replacement ,If you have not got the replacement for a long time, it is recommended to provide the tracking number to RMA team or local support after the faulty unit is arrived to speed up the RMA process, for more RMA process details please refer to local RMA policy  here: 

https://www.tp-link.com/support/replacement-warranty/

I sent you some information about your RMA case via private message, click your profile to check Messges.