Dear alzhao, with all due respect: I understand the difficulties in developing software using non-open-source drivers. But: getting the country-settings work correctly (i.e. starting with making it possible to select the correct country / region via GUI) along with getting DFS work correctly is not an issue of “low level hacks” - it is a basic requirement for operating your routers in accordance with regulatory requirements! And, as you might see from the rising number of posts, the issue affects the basic operation of the router because users find themselves being unable to connect to certain 5 GHz networks!