RingCentral Conference Participants are unable to talk to each other until the Host joins. Instead, they hear a message that says, "The moderator has not joined yet". This issue is due to the fact that the user has not enabled Enable join before host for their RingCentral Conferencing bridge.
Click on links below to learn how you can enable the Join before host feature on the following.
RingCentral Online account
RingCentral Phone for Mobile
Enabling join before host on the RingCentral Online account
Click the Conference button, located in the upper-right part of the Online account.
Check Enable join before host.
Enabling join before host on the RingCentral Phone for Mobile
Tap the More
Tap the Join Before Host
RingCentral Conferencing Frequently Asked Questions
Audio Conferencing on the RingCentral Phone for Mobile