When shall R550 be supported to choose channel 173 or 177

[Fantasy]

My R550 unleashed version is 200.16.7.0.325. I set Country Code: United Stated and Channel Optimization:Optimize for Compatibility.Channel 173 and 177 are not optional ,when shall it be supported?

[mecbelly11]

Recently I upgraded, there is now an R650 in the dining room, and R550 near my office, and an R550 on the side of my garage However, it seems I now have much less range than I did before on 5Ghz. Is this expected? Has anyone noticed something similar?

9apps

[lardassresponde]

Channel 173 and 177 are typically not supported in the U.S. due to regulatory restrictions on certain frequency bands. Support for these channels depends on updates from your device manufacturer or regulatory changes. Keep an eye on firmware updates for your R550, as they may enable additional channels in the future.