Comment by drum55

There's actually a known prototype MacBook Pro from 2006 with a cellphone radio, and the release MacBook Pros from the time all have a weird looking area near the battery and RAM where the SIM slot was supposed to be, and some leftover parts for the goofy little extendable antenna on the screen. Hopefully they end up doing it.

https://www.macrumors.com/2011/08/14/photos-of-a-prototype-m...