Oops. Read the question wrong. So far as i know, once you flash a radio, it's there forever. Unless you flash a new one. Depending on how someone makes their ROM, this could change, but I'm betting that most of the devs aren't worried about forcibly making the people flashing their **** switch modems.
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I'm on that Twitter thing the young people like.
@ThePatrickBauer if you like infantile humor and SATAN.