Hello Community, I'm very new to this, but managed to set up a cloud based server and had a provider set up the SIP trunk and 3CX. My issue is that we can receive calls from people in the 3CX network on mobile devices (a mix of Apple and Android) yet anyone calling in externally seems to be ignored. The phone then shows the missed call when the caller hangs up, or the call goes to voicemail. The Mac and Windows software shows the incoming call just fine, just mobile devices don't. Sometimes the mobiles will notify the call, but more often than not, it wont. I have set up a cloud based push service for Android. I can make outgoing calls just fine. Where do i start?