I know that I have the ability to point my phone to send SMS when iMessage is unavailable. What I've found is that the process can take a V-E-R-Y long time to go that way. The problem I'm running into is that if I notice that it hasn't "gone" in a few minutes, I'm unable to press and hold the message to force it to send as a text. The only option I get is to either copy it or send as an email. Typically, I've found that when I run into something like this, it's user error but I am unable to find out where I'm making my mistake. Any expert advice would be appreciated!