A mobile communication device comprises an internal antenna device for receiving low-band signals of operating frequency band below 1 GHz, and the internal antenna device can be connected in series or parallel with an external antenna such as an earphone. The mobile communication device of the invention uses the internal antenna device for receiving low-band signals, enabling radio alarm function and timed recording of radio programs without plugging in an external earphone.

 
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> Compander, and associated methodology, for a radio communication station operable pursuant to a coded squelch scheme

> Event and sport performance methods and systems
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