Thanks very much! I still have other questions(See "Additioanl questions" below)

Thanks for your reply! We do not use CallKit. One reason for doing this is to allow users to switch network nodes via the UI when the network is poor, thereby improving call quality. 1.Is already on a call. Can it be a RTC Call with custom UI? I've compiled some Additionalquestions and included them in the reply below. I hope you can help answer them. Thank you again.

Thanks for your reply! I've compiled some Additionalquestions and included them in the reply below. I hope you can help answer them. Thank you again.

Thans for your reply! We do not use CallKit. One reason for doing this is to allow users to switch network nodes via the UI when the network is poor, thereby improving call quality. 1.Is already on a call. Can it be a RTC Call with custom UI? I've compiled some Additionalquestions and included them in the commit below. I hope you can help answer them. Thank you again.

Thanks for your replay! This is a bad idea. It's going to significantly complicate your app’s .... One reason we use a custom call interface is that when a user's network connection is poor, the UI can automatically switch network nodes to improve call quality. 1.Is already on a call Can it be a RTC Call with Custom UI? I've compiled some Additional questions and included them in the reply below. I hope you can help answer them. Thank you again.