If you have a phone with a FM transmitter, like Nokia N8, you can activate it and you have a wireless microphone that works with all FM radios.

如果你的手机有一个FM调频发射机如诺基亚n8，你可以激活它，你有一个无线麦克风，与所有的FM收音机的作品。

youdao

Alright manufacturers, we're totally down with throwing in a bit of draft-N love or even a free FM radio, but seriously, why not activate the goods (without some controversial fee) before shipping these things out?

ENGADGET: Nokia's N800 secretly packing an FM radio chip?