Sorry, I just scanned the comments and didn't find anyone mentioning this:
It's really easy to spoof a phone number for SMS if you know which network the person's phone is on. Trivial if you know how. There's no black magic to this. At least, it was so a couple years ago. The last time I fooled with that for fun, I spoofed one of my friends admitting to another that he'd slept with the other guy's wife and decided afterwards he was gay. I managed to insert it from his phone number into our group chat as it appeared on android. (I think it might've ended up in a separate chat sequence on iphone). That was funny.
It's really easy to spoof a phone number for SMS if you know which network the person's phone is on. Trivial if you know how. There's no black magic to this. At least, it was so a couple years ago. The last time I fooled with that for fun, I spoofed one of my friends admitting to another that he'd slept with the other guy's wife and decided afterwards he was gay. I managed to insert it from his phone number into our group chat as it appeared on android. (I think it might've ended up in a separate chat sequence on iphone). That was funny.
There's no dark arts here.