Guys, thanks for this thread. Gosh, I feel so stupid. I've always wondered to myself why cell phones (in general) require headphones to be plugged in when starting, but later keeps playing if you remove the headphones (then switching to phone speakers). I could never figure out the purpose of this. Finally, I started believing that it was some (stupid) agreement/regulation that had been made to keep eg. dozens of kids from sitting on the bus each playing different radio stations loud. Now, I get the big picture, the earphones I plug into my phone also act as antenna. Wow, talk about getting grilled up inside your whole head.
Cheers! xD