I am one of the unlucky iPhone 3Gs owners who is on the stock firmware 3.1.3. No downgrade or JB or unlock yet.

Question: I have a Blackberry Bold 9000, which is my office phone. Is there anyway I can use my iPhone to use for calls which can be routed via my Blackberry using BlueTooth. The reason is that I don't have to use both the phones together. So one phone cuts everything and the blackberry sits in my pocket always. I tried this and iPhone does not recogonize the blackberry bold 9000. If any of you have done that please let me know the details.

This should be simple if we can use iphone as a wireless earpiece for my blackberry. But I have no idea how to do this.