Call Waiting Issue

[steiny]

This has to be super simple, but I haven't been able to figure it out...when I'm on a call and an incoming call comes in, I hit answer and connect to the 2nd call...but then when I'm done with that call and want to switch back over to my first call...I can't figure out how? What am I missing here? This shouldn't be that hard to figure out but I'm at a loss.