[basilray]

It may also be a combination of the other person's phone and/or your radio. When I was on some ROM's, periodically, SMS messages that for some reason couldn't be sent would randomly send later, often times after a soft reset. This could be the case w/ your friend's phone.

Also, I'm going to go ahead and assume you have not, but have you done any testing with other Radio drivers? I think there are like 12 of them floating around, so it's a bit of trial and error. Flash one, try it for a day or two, and if it's not better, try another.