When someone talks about the radio in a cellphone they mean the radio software
and hardware that talks to the tower in the transceiver sense not the radio as
in AM FM sense. Now there’s an exception to that.
Many older phones had AM / FM radio hardware included in the cellular
radio chip. This was because vendors started to use software based radios
which meant instead of building radios out of crystals or phase lock loop clock
based circuits they used digital convertors and software and could make a radio
receive any frequency they wanted just by programming the software to work the
hardware correctly. This meant they included a radio, added a lead to the
headphones for an antenna and bam AM/FM radio. That never was done in the
iPhone to my knowledge. No radio in the software or hardware. Now the radio
hardware is very complex and I don’t think anyone includes that function at all.
Good luck.
> On Dec 29, 2015, at 3:43 PM, Jim Gatteys <jgatt...@gmail.com> wrote:
>
> Hi all!
> Just curious. I have heard that there is a built-in radio chip in most smart
> phones. Is this true and how does it become activated. If this is the case
> why do we need special apps to listen to radio?
> I have an iPhone 5S and would like to know more about this.
> Any info would be appreciated.
> Thanks,
> Jim
>
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