App use issues

What should I do if the prompt "This account already exists" appears when completing account information for a guest account?

Does local scene linkage get supported after the establishment of a Bluetooth Mesh network?

How to set the air conditioner switch status as a condition for a scene?

How to delete recommended cards on the Smart page?

Why can the device be controlled normally in the device panel, but show offline and fail to execute in the automation record?

How does the Phone&SMS notification service send alerts after purchase?

I have already turned off the automation switch; why am I still receiving phone and SMS notifications?

What should I do if I can't find infrared sub-devices when creating automation?

Can multiple action steps in an automation task be executed with intervals or delays?

Why can my smart device trigger the configured Automation normally for the first time only, but fail to do so afterward?