Hi, actually im upgrading my phone FW from 112 to 113 using ziphone. i want to know how to dial third person's number (from keypad) to make conference. i knew that we can make a conference from 'add call' and 'contacts' button (i think these two button posses similar function and process though), but if i want to dial the number straightaway from 'keypad' button (with the other party still holding the call), how im supposed to do that since i can see only 'end call' and 'hide keypad' but no dial or call button?