Bluetooth phone

Occasionally, when I start my cell phone and use the voice command to make a call the following happens.

1. The message comes up that the connection was ok.
2. I start the voice sequence.
3. I say "Dial".
4. The system says that there is no connection.
5. Immediately, I go the phone screen.
6. I reconnect the phone thru a few screens and I can make the call.
7. So, the Blue tooth was fine for a few sceconds then dropped the connection, and a few seconds later was ok.

The result being it is just a little aggravating.

Any answers?