Why this unit Sony Ericsson R300 always showed switching failed when I switch from FM to AM band modulation?

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The small grey "rocker" wheel, which is used for tuning, is also used to switch between AM and FM. Simply press the wheel in the middle and it will switch bands.

changing of our bandwith,
amplitude modulation for khz not mhz so how can we use the AM RADIO

Why this unit (Sony Ericsson R300) always showed switching failed when I switch from AM band modulation but on fm.. are ok?

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Hey thanks for using fixya
Actually by default there is no any trick to listen fm without earphone. If u want to listen not from he headphone, then its better that just attached the headphone with Handset, Now go in options of Radio, There is option as "loudspeaker" now you can listen fm from loudspeaker.
Enjoy

I hope it 'll be helpful for you.
Kindly keep thumbs up for rating.
Thanks

Try the Sony Ericsson website. They should have it there.

How to unlock - http://www.youtube.com/watch?v=N-NC40CPKsA&feature=related
Hope I helped Dr Reed

what radio do you have? does it even have sideband channels? some radios don't come with them, of fm or upper or lower side bands and short wave