The only available firmware currently is for Auto Reset and RPC1, based on 0L14, 0L15, 0L16, 0L23, 0F21, 0N21 and 0B26.

We downloaded the utility, which at the time of the review was available only in beta version and we started the flashing process:

After we rebooted, we found that the previous region code had been reset and the 4 available changes had disappeared.