How to Enable Call Waiting in Moto G6 (Stock Android 9.0 Pie)?
Step 1: Open 'Phone' App.
Step 2: Tap on 'Three Dots' at the top right.
Step 3: Tap on 'Settings.'
Step 4: Tap on 'Calling Accounts.'
Step 5: Tap on the 'SIM' for which you want to enable 'Call Waiting.'
Step 6: Tap on 'Additional Settings,' It will read settings, and when it's done doing that. You will get the 'Call Waiting' option.
Step 7: Tap on 'Toggle' button next to 'Call Waiting' to enable it.
It's done.
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