Yup. Like I said before, it probably took a few hours for my phone to connect to any network; but when it did, it said "ATT-Digicel" on the screen. I was then able to try *120# and see that I had no credits. I'm using a 5 year old AT&T Blackberry that I unlocked and had setup with a digicel SIM a couple years ago.
I never knew about the *124#, Captain. Thanks for the heads-up! I'm gonna try it now.