1. While on a call, touch and drag the Answer icon to the right to answer call waiting.
   
2. Tap the desired option.
   
3. To start a conference call, tap Add call while on the line.
   
4. Access the desired contact phone number, or manually enter the desired number. Tap the Call icon.
   
5. With both calls on the line, tap Merge to begin three-way calling.
   
6. Three-way calling is now enabled. Tap End call to hang up.