来尝试一种别样的通讯体验吧。Signal 不仅提供各种常见的功能，还尤为注重隐私安全。 In case you've preferred to have to have admin acceptance just before persons can join a simply call, you will see requests to join the decision which you can approve or decrease. You can also remove persons from phone calls and optionally block them through the call so https://www-signal.com/