Apparently when you move a registered Google Fi SIM to a new phone w/o re-registering it w/ the Fi app, incoming SMS have 16 random chars appended to the end. I assume registration causes local apps to hide the text. I wonder what Google is using those strings for?
Just a guess, this would be some kind of identifier so that they can map the actual sms back to some entry in their own database.
@kyle This is super creepy.