First of all make a simple check that you phone is not set on mute.
Then make sure that you have granted iPlum app access to the device audio.
iPhone/iPad Device Settings > iPlum app. Enable the Permissions for Microphone and Notifications.
a) Device Settings > Sounds & Notifications. Make sure the Ringtones & Notifications is not in silent mode
b) iPlum App Settings > Ringtones & Notifications > Check Ringtones & Message tones. Make sure they are not set to silent.
c) In some rare cases on Android we have seen some apps running in the background which may take over audio control & won’t relinquish it to other apps (like iPlum) unless they are closed/killed. Please check that.
Thanks, your download link is on its way!
Now how about inviting your colleagues and friends to join you on iPlum? More contacts on iPlum mean more secure communication for everyone!