Originally posted by MileageAddict:
One thing to keep in mind: You can't switch back to the orginal long distance company and expect to get a sign up bonus for the same frequent flyer account.
You may not be able to get a sign up bonus ...
What you can do is this: I have my US Airways account, that's my *primary* FF account and the one I'd prefer to always get miles in. So I signed up with MCI when I got my new phone line. After I finish getting my signup bonus of 1,000 miles/month, I'll switch to Sprint for the best deal at the time and collect Alaska or Northwest miles for a while. Within a few months, MCI will phone me and offer me 10K miles or something like that to come back, so I will ... it's not the standard sign-up bonus, but something to get me to come back. Just wait for the call, it will come ...