No issues here. Have you tried to remove your microcell device and add it again in the AT&T website? Basically set it up as a new device.
Just now thought maybe it cached the old phone's ID somehow. I'm trying a reboot of the device now...
Will let you know. Also a good idea! Thanks, will be my next step.
What is the problem? Blinking lights on the microcell itself? Or are all the lights solid but nothing on your phone?