Phone rings while I'm on the phone

[traceyscissors]

My phone rings WHILE I'm on another call, it drives me mad! Is there a way of stopping it and letting the other caller know that my phone's engaged?

[xSteveuk]

Hi
You could try
Call waiting
It will beep
If receive a call
While you are on phone

Go phone - Settings
Supplementary Settings
Call waiting

If your network provider
Has enabled it

[AndrewL]

@traceyscissors: Further to the advice offered by @xSteveuk, please head to the Phone app > Tap the 3 dots in the top right > Settings > Supplementary Services > Call Forwarding > Voice Call > Forward When Busy, and enter your voicemail number here. With Call Waiting and Call Forwarding enabled, this should stop calls coming through while you're already on a call.