So.. I have a Sanyo Taho by Kyocera. It is a sprint phone. Sprint BYOD accepts the IMEI but it wants me to enter the sim card number to add a line. It does not give an option to order sim card from sprint directly. It is an old flip phone and does not really need a sim. Settings does not show ICCID.
I have a few Kyocera Kona flip phones too. BYOD accepts the IMEI but needs sim card number. Which I don't have for it (and no way to put a sim card inside the phone either). No idea how to find ICCID
So T-Mobile will have to keep filing those monthly "Band Reconfiguration" status reports to the FCC until the rebanding is complete.
Here's the most recent one: https://ecfsapi.fcc.gov/file/10402116410705/800 MHz Report April 2020.pdf (Dated April 2, 2020)
Still one public safety licensee and one non-public safety licensee remaining after all this.... Hopeless.