Yeah how many phones supported bluetooth file sharing in 2007? NONE. The king of the heap was the blackjack running windows CE of all phones and it sucked horribly. everything was a nightmare and at times you could not answer the phone as the CE phone app would crash silently.
the iPhone back then destroyed the competition because it was far more reliable than the other offerings that was not a flip phone.
Sadly today.... I have experienced the "cant answer the damn phone" problem on my iphone 6S. Apple has absolutely lost their way, any phone should on phone ring fire a hard interrupt that forces the phone app to take over and work regardless of the apps in the background. it should be baked into the OS that answering a phone call is top priority above all else.