[gbm85]

Yes there is an I2S for digital FM audio, but it is unused. Look at the Diamond or GSM Touch Pro, you will find references to I2C but not a single one to I2S.

I want to emphasize this as much as possible because it doesn't seem to be understood by anyone other than me and kb9nate:

The FM chip on the CDMA Touch Pro is working

What does this mean? It is 99.9% NOT an SPL disable.

The chip is working!

What is not working?

1. Picking up a signal (other than an incredibly strong one)
2. Audio output

It is possible that (2) could be an SPL disable. (1) is absolutely not possible to disable in SPL.

I am 99.9% sure this is a hardware disable. Though as I said before, I would truly love to be proven wrong.

I also said before that Version 1 may not suffer from the same hardware disconnect. So if you want to put your effort into something that actually has half a chance of working, try to get the radio working on a V1 device.