Not registering1. Use https://youfiles.herokuapp.com/telnetclient/ to Telnet to port 5060 on 156.0.96.602. Set the phone setting "Sip Keepalive" value to a lower amount of seconds.Inbound and Audio Issues1. Reboot your phone.2. Double check your sip account credentials, Account Balance and Cloudtime Balance3. Check your internet connectivity by visiting www.google.co.za4. Go to our portal, Click Registrations - Click "Check your Firewall IP Blocked Status" to unblock your IP.5. Disable firewall and NAT settings on your router.6. Disable SIP ALG on your router.8. Check that your upload speed is greater than 5MBps using www.speedtest.net