Originally Posted by bradster80
Try holding down the top mute button. Works on the 8700c to change to vibrate profile and holding down again will change back to normal. Don't have an 8300 to test with, but worth a shot.
For the record, I just tried this and the 8300 just went into "Standby Mode." I called my phone from a landline, and it rang through loud and clear.
From what I gather, Standby Mode is really just a Keyboard Lock. It doesn't shut off the radio hardware, calls still ring in loud - the only thing that happens is your keyboard/buttons are locked until you press the Mute button again.
I think your best bet for a quick profile change would be to assign a side convenience key. HOWEVER, to the original poster: Did you know if you just hit the Green Answer key from the home screen, it instantly loads the phone app PLUS you can start typing in someone's name and it pulls their address book information in real-time! All phone numbers you have entered in the address book auto-populate and are highlighted. I simply don't need to use the Address Book application anymore once I found this, and perhaps this is what you need instead of having an entire convenience key assigned to the Address Book application.