I'm thinking about buying a Bluetooth cordless phone set, the type that can link to a cell phone (HTC Touch Pro 2) via BT. This is the Vtech phone I'm looking at:

http://tinyurl.com/23b2aou

The way it works is that the cell phone and Vtech pair-up and calls that are received from the cell phone ring on the Vtech when it is in BT range, so I'm able to pick them up on any of the Vtech phones in the house. The Vtech has touch buttons on the touch screen for "Home" and "Cell," so I can use either. This sounds good on the surface but as I understand it there are drawbacks and limitations.

First, I routinely use a BT headset on the cell phone around the house, and BT devices can only be used with one device at a given time? I'm assuming this holds for use, not pairing. My questions are these:

1. While paired with the cell phone will the BT headset still work with the cell phone as long as it isn't taken on one of the Vtech phones?

2. If I get a call on the Home line will I be able to use the BT headset while the Vtech is paired with the cell phone? What about the reverse, if I get a call on the cell phone? I know I can't use the BT headset while receiving or making a cell call on the Vtech.

My understanding is that if BT isn't being used you can use it in another capacity even while paired elsewhere. IOW if the cell phone is paired to the Vtech and I want to use the BT headset with the cell phone I can do it. The same goes for the Vtech, but only on the Home line. That brings up another question:

3. If I push the "Call" button on the BT headset and it is paired to both phones, which phone will respond?

Most of these questions revolve around my inexperience with using two BT devices together. Has anyone owned this type of phone or a similar system or have a good understanding of how BT works with three devices and can shed some light on these questions?