In order to allow multiple calls with callkeep, we need to do some modifications. This issue is intended to list all resources about this subject. # iOS - [maximumCallsPerCallGroup](https://developer.apple.com/documentation/callkit/cxproviderconfiguration/1648351-maximumcallspercallgroup) # Android - [addExistingConnection](https://developer.android.com/reference/android/telecom/ConnectionService#addExistingConnection(android.telecom.PhoneAccountHandle,%2520android.telecom.Connection)) ? - [addNewIncomingCall](https://developer.android.com/reference/android/telecom/TelecomManager.html#addNewIncomingCall(android.telecom.PhoneAccountHandle,%20android.os.Bundle))