Why is my phone not receiving calls?

There can be several reasons why a phone may not be receiving calls. Firstly, it is important to check if the device is powered on and that it is not in airplane mode, as this can disable network connectivity. Additionally, it is worth ensuring that there are no issues with the network service provider, which can sometimes experience outages or disruptions. If the phone has been set to do not disturb mode, calls may be silenced or blocked. Another possibility is that some settings on the phone may have been inadvertently altered. For instance, check call forwarding settings to ensure calls are not being redirected to another number. It might also be beneficial to confirm that the phone number is correctly entered and not blocked on the device. If the issue persists, inspecting the SIM card for damage or ensuring it is properly seated within the SIM card tray can also help. Sometimes, a simple restart of the device can resolve temporary glitches. If none of these steps resolve the issue, one might consider looking on the Optus website for further assistance with troubleshooting or other relevant support options.