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by jsjohnst 2496 days ago
> I thought the Wireless Emergency Alerts protocol was completely separate from SMS though

They are entirely separate from SMS, you are correct. WEA messages are sent inside System Information Blocks (SIB12 specifically). Other SIB blocks are how your phone learns of authorization to use the tower, what frequency channels to use, neighbors of the tower, and other control related info.

1 comments

Thanks!