1. Swivel your phone or swipe down from the top of the screen, and then tap the Settings icon.
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  2. Tap Phone.
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  3. Tap Configure call waiting.
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  4. Tap Additional Settings.
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  5. Toggle the switch to turn On call waiting in order to receive calls while you're already on a call.
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  6. To add another contact to the call, tap the + icon.
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  7. Select the contact from the list.
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  8. Tap the phone number to call.
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  9. The current call will be placed on hold while the selected number is dialed. Tap Merge to connect the calls.
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  10. The conference call will begin. Tap End Call to hang up.
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