Ah ok. Seems like they could just replace the Bluetooth module, no?
I would think so but not exactly sure how the MCU is built. I had been working with them for a few weeks trying to figure out what was going on. They finally e-mailed me and said they were replacing the MCU so maybe it was something else.
I did ask if LTE was a paid upgrade since they were going to the trouble of taking the old one out, might as well piggyback onto the work and get it done if not too expensive.