SMS Part 2

I'm still having trouble with SMS reception. I've modified the source to get a better sense of what's going wrong and it appears that I'm getting stop bit errors (it also looks like there are stop bit errors on transmit as well). One interesting thing is that one message did get through, which means reception is at least possible, so I'm thinking that tweaking the X100P's quality is required (but then, I need to do that for voice as well).