Sorry, but the answers to your questions are no and no. Modern scanners are what they are, and they cannot be modified to monitor any secure (encrypted), digital, or cell phone communications. There is no magic fix to convert an analog scanner to digital. If you want to listen in to digital communications you'll need to purchase a digital-capable scanner, but that will still leave you without cell phone coverage or the ability to listen in to whatever secure transmissions you're referring to.
Bill B.
Listening in since the 60's
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