Cellular green light blinking

Just set up last night. T-Mobile sim card and cellu light has been blinking for hours.

Hi. That’s not much to go on. Please tell us:

  1. Exactly which model you have.
  2. Which firmware you are running.
  3. Which carrier you are using and what APN you have set (or “auto.”)
  4. When you navigate via the GUI to Dashboard → Cellular what you see there just to the right of “Cellular.”