Configuring BLU Logic 1211 in my Pruis 2010

My Prius 2010 without navigation has a BLU Logic 1211 bluetooth package. This was one of the initial models where it was not integrated into the audio system's display, but instead just had 3 buttons (up, call & down buttons) below & to the right of the steering wheel.

I recently erased its bluetooth pairing with my phone, by holding down the call button for about 15 seconds (till I heard 4 short consecutive beeps). Then, when I tried to pair it again, my phone would ask me for a pin that I had conveniently forgotten.

The manual had no information about this & the information on the internet was skimpy. Finally, here's what I found:

1. The BLU Logic 1211 is configured with a pin/passkey as "1234". I am not aware of any way to change this, but this one just works.
2. For information about the different operations that can be done on the Blu Logic 1211, visit http://blulogicupdate.com