flashing red signal strength LED

@Ken1 - AT&T will do periodic maintenance late at night. Part of which is verifying your location which may require a reboot. If the reboot fails, then the unit may not re-register correctly with AT&T. Try to power cycle it first, including the router. If that doesn't work, do a hard reset. Turn off the power to the MicroCell. Push a paperclip into the small reset hole in the back. Keep pushing in on the button while restoring the power. Continue to hold it in for about 30 seconds and then release it. The MicroCell will reset itself back to factory defaults and go thru the Initial Activation process (details given in my Tech Guide). You don't have to do anything with your MicroCell account (myAT&T MicroCell Settings page) because the unit, and its settings, will remain associated with your cellular account.