Call notifications

[LRR]

When I'm on a call and not looking at my phone I do not hear anything that lets me know someone is trying to ring. The person calling only get a 'this line is busy' recording. Also there is nothing in my missed calls once the original call is completed. I what the phone to interrupt the original call with a sound letting me know someone else is calling. Please help

[AgSv]

In Android 8 (Oreo), probably similar in 9:

• Press Phone app on the Home screen.
• Press menu button (three dots top right).
• Select Settings.
• Select Account for calls.
• If having a phone with dual-SIM, select the one you want to change (at the top, indicated by the operator name).
• Select Additional settings.
• Now you can enable and disable Call waiting.

You can also look at information from your telecom provider regarding calls waiting and missed calls; there could be some different options. For example, if a phone is off, or in flight mode, it obviously won't record a missed call in the log, but my operator also sends a SMS, short text message, for missed calls.