What sort of radio signal are telephone calls and SMS texts?

Question

I have been studying how radio signals work lately trying to get my ham radio license. I then realized that phone calls and texts are essentially radio signals. What sort of signal are they? What frequencies do cell phones calls operate on? Is there a way to intercept and decode sms text messages using some sort of reciever? How are they encoded and decoded? This is just for hypothetical reasons. I have no interest in trying to intercept phone calls or anything.

In: 5

Answer 1

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