We may not have the original firmware to provide you to downgrade firmware if you regret upgrading. Some models have multiple hardware versions and firmware version. Please verify the firmware version of your device. It can only upgrade firmware for the same hardware version. Wrong firmware upgrading may damage your device and avoid the warranty. Do NOT upgrade the firmware via wireless Tenvis TH661 Network Camera 4. Any ideas here would be muchly appreciated. The professional technical staff should get[…]
