HOW to use 3 way on Treo There is a way to use three way on the Treo 755p without hanging up on the original call. While on the original call press the green send button once or twice. A screen will appear asking if you want to switch to flash mode. If you select yes, at this point the phone can be used like a landline. You can press the green send button to get a dial tone to make another call. If you want to disconnect the call with that party simply push the green send button again to hang up on that caller and return to your original conversation with the other party. |