The radio chip was used with our headphones as an antenna for the signal. It wasn't practical however due to the need for the headphones. I myself don't truly think we've a radio antenna within our phones beyond that hack of sorts but I can be wrong nonetheless.
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But if the chip/part of a chip is in there then it should be turned on.
If only it were that easy. It's been used in the iPod Touch from 2nd generation on, and from the original iPhone on. The iDevice community was enormous for years before Android became popular, and none of those devs could crack through and turn FM on. It would be nice if it were enabled, I've wished it for a long time, but sadly I don't think it can be enabled by anyone except the manufacturer.
My thoughts was someone didn't want to spend the money to get a license from the fcc?
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