Hello,
The op is in Česká Republika, where there are likely more TETRA systems. I have seen comments elsewhere in regards to TETRA support for the SDS100E and the response received from Uniden Japan was reportedly they are working on it.
I recently went on a trip through NJ and wanted to load the beta firmware onto my DV-1. The DV-1 did not recognize it as firmware and I wonder if it only works on unblocked receivers. I suspect that if Uniden does come out with TETRA support, it may only be on the SDS100E (European Model).
73 Eric