I had a Passport 8500 and V1, they don't work anymore.
I still have the RX65i, it still kind of works.... 2 seconds of warning is better than nothing.
It is because the government replaced all those good old ka band radar with new cameras that use very low k band frequency and extreme low microwave leakage. The V1 simply can't see them at all.
The only radar detector that still gives 5 seconds warning here is the "Stinger system". It cost 10x more than a V1, and is difficult to install.
Btw police are testing new magnetic speed cameras, which will be completely undetectable.