[jareklupinski]

If you have some way of measuring the received power from each satellite inside the cell phone, you might be able to use that as feedback to the array to better focus the signal/s?

You wouldn't need to disable the radio altogether, just swamping / destroying the antenna would be enough to 'disable' the system, for all intents and purposes. Since an antenna is optimized for a known frequency, resonance would probably also help.

It sounds just "James Bond villain-y" enough to not work.