Το iphone εχει ενσωματομενο δεκτη FM και ειναι απενεργοποιημενος
Αυτο για ποια Iphone ισχυει?? Για το 2G , 3G η 3GS ??
FM ReceiverThe iPod Touch "2G"/"3G" and iPhone 3G/3GS have a built-in FM Receiver chip, so technically it is possible for these devices to listen to FM radio. Unfortunately, Apple wants buyers to purchase songs from iTunes, and if you were allowed to listen to free music off of the air, they would not make as much of a profit. Therefore, at this moment, there is no official FM radio application. It is possible to create a homebrew one, but a fully documented working FM receiver driver would be needed to control channel changing and the like.
The FM receiver in the iPod Touch "2G" and iPhone 3GS is inside the Broadcom BCM4325 chip.
The FM receiver in the iPod Touch "3G" is inside the Broadcom BCM4329 chip.
Nike+Nike and Apple partnered to provide a way for the iPhone or iPod Touch to track your workouts. It requires extra hardware to function, namely a sensor that you place inside your shoe. This sensor has an accelerometer inside to track the up and down movements of your feet. The sensor transmits a special signal for your iPod Touch or iPhone to read. The iPod Touch "2G"/"3G", and the iPhone 3GS can read this special signal using its built-in receiver chips. iPod Touch "1G" and iPhone "2G"/3G lack this ability and do not work with Nike+. Note that although Nike+ works for the iPod Nano, they require a special receiver peripheral plugged into the bottom. At this moment it is speculated that the custom signal transmitted by the sensor is on the same frequency as Bluetooth (close to 2.4GHz), but it may also be possible that the undocumented FM receiver chip is picking up the signal. If that is the case, perhaps the iPhone 3G can also use Nike+ in the future, as it also has a FM receiver chip inside.