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That doesn't explain how the SMS message comes from someone the user knows. I would assume (and I think this is what GP was getting at) that the fake tower snoops on outgoing messages in order to collect numbers that the user has in their address book, and then spoofs a message from that number?

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> SMSs written to appear they are from someone that knows the recipient

I don't think this means they are sent from numbers known to the recipient. Only that the content is written such that it appears to be from someone who knows the recipient.

I don't know if actual spoofing is possible.

Yeah, if you look at the codebase it just selects a random string from an array of prewritten messages and sends that.

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