Comment Re:registered-only list. (Score 1) 51
Why don't telecons maintain a database of legitimate towers and send an updated list to one's phone every week or so?
That's how it used to work, although the update frequency was much less than 2 weeks. If you didn't update, you could even lose connectivity. And it was not transparent: you had to do something on your phone that disrupted usage, in order to download and install the tower update. They stopped doing all that, or made it totally transparent. It was probably too hard to keep their databases up to date.