Can smartphones be programmed to receive specific radio signals?

  Fruit Bat /\0/\ 13:21 18 Jan 2014

No, the GSM the phone is designed to work within are -

2G(en) 900 (33.4cm) and 1800 MHz (0.167m)

3G(en)2200 MHz.(2.2 GHz)

Most phone antenna are 1/4 of a wavelength long.

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