How to enable call waiting alert

[purushoth]

Sir, 

Pls guide how to enable call waiting alert in samsung M30 mobile.During one call cant able to recognize the another call.

[Shailesh_Kumar]

Step 1. Tap on Phone icon.
Step 2. Tap on three dots on the top right corner.
Step 3. Tap on Settings.
Step 4.Tap on Supplementary Services.
Step 5. Tap on Call Waiting to enable it.

[Sidhabhi]

Check screenshots

[purushoth]

Thanks sir