How to Activate Call Waiting in Redmi Note 7 Pro(MIUI 11.0)?
Step 1: Open Phone App.
Step 2: Tap on 'Three Horizantal bars(Menu)' to the left of dialer.
Step 3: Tap on 'Settings,' and then tap on 'Call Waiting.'
Step 4: Tap on SIM for which you want to enable call waiting.
Step 5: Tap on toggle next to 'Call Waiting.' After that, read the message, and then tap on 'Open' button.
Step 6: It will update settings, after that, It will be enabled.
If you want to enable call waiting for another SIM, just repeat the steps 4 to 6.
It's done.
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