1. Open the Phone Dialer app and tap the three-dot icon – it's on the left side of the search column.
2. Go to Settings > Calling Accounts > Operator > Additional Settings.
3. Turn on Call Waiting.
1. Open the Phone Dialer app and tap the three-dot icon – it's on the left side of the search column.
2. Go to Settings > Calling Accounts > Operator > Additional Settings.
3. Turn on Call Waiting.