Can I access the main radio in a smart phone from an app?

neela77777

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Feb 18, 2016
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I am looking to write an app that accesses the main cell radio in a smart phone -- to transmit on allowed frequencies. Do you know if an app can gain access to the radio, to use it as needed? Thank you.
 

ManiacJoe

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Aug 5, 2015
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Some handsets used to do that. "Push to talk" was the feature.
I would expect that the feature would require its own radio frequencies so that it did not interfere with the normal phone-to-tower communication.
 

neela77777

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Feb 18, 2016
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I think the current PTT apps like Zello use the internet to carry the signal around. I am just wondering if I could use the RF antenna on the phone itself to directly communicate with another phone, say, a half-a-mile or a mile away. Is the RF antenna even accessible to an app running on IOS or Android? I think using the correct frequency and avoiding the frequency used by the phone service provider is a matter of detail.
 

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