My US 3597 works fine with UK, Belgium or Luxemburg as Locale after reset, then followed by AU chosen via 'Change Locale' in diagnosics page>developer info. Overspeed and street name np and importantly ASR work as it should. On my 2012 devices, i had ASR problems with UK, Belium, Luxemburg etc as locate after reset although street name & overspeed ok. It may have been because there was no EU map on the unit, I don't really know. I'll do some investigation to check, but i do know that ASR works again when AU is reselected on a 34/3590 having the AU map on board. I think it must be to do with the 3597 having the secondary choice for locate whereas the 3490 & 3590 do not. It's been quite some time since i tried with the 2012 devices and i have actually only very recently become aware that these features are not well-known by others outside of EU countries.