I love the device but I feel a really big oversight (maybe I am wrong) if so please enlighten me. Shouldnt one of the 4 buttons be a phone button to bring you right back to the phone app as fast as possible? I feel like I get lost a little in the OS when looking for the phone app. I feel it is not intuitive to getting back to hang up a phone call etc... and doing it in a FAST WAY. Maybe its just me?