5 GHZ WiFi Randomly Quits
I have been using the Arcadyan KVD21 gateway for just over a month. Randomly the 5 GHZ WiFi connection will drop. I have had it go for sometimes 7 or 8 days without problems, then drop. Also sometimes only 12 hours or less, then drop. Once it drops, the SSID cycles between broadcasting and not broadcasting. All connections to 5 GHZ wifi are rejected (2.4 GHZ WiFi continues to function each time). The only solution I have found is to restart the gateway, which is easy if I'm at home, but doesn't seem to be possible otherwise. So if I'm away and the systems that are connected to 5 GHZ, such as an NAS, cannot be accessed remotely until someone is home to restart the gateway. I had to move my security/alarm devices to 2.4 GHZ WiFi because of this. I have read some similar posts on this forum, but they look to have been started 2 years ago and don't specifically mention WiFi. I called tech support and they said they hadn't had any reports of this issue! They offered to replace the gateway, but it would be with the same model and I don't think it's a hardware issue. I speculate that it has something to do with the OpenWRT firmware, which, according to posts in their forums, has been updated and resolved similar issues. T-Mobile doesn't have any updates for the firmware at this time. I also wonder if it might have something to do with the DFS 5 GHZ WiFi firmware subroutines, which have also has had problems reported with OpenWRT. T-Mobile provides no interface to select the 5 GHZ WiFi channel, so there is no way to avoid the "auto" assignment of a DFS channel. Another issue, which I've also seen reported in other forums, is that devices on the same SSID cannot ping or "see" eachother. Strangely, If I connect the searching device to another set up SSID on the same gateway, it works. Again, seems to be an OpenWRT firmware issue. So, with these issues, I probably would have canceled T-Mobile Home Internet Service during the trial period, except that the savings over Spectrum currently outweighthe (considerable) hassle!
Strange connection problems with T-Mobile
Since I changed from Spectrum internet to T-Mobile I have noticed a few issues. The first one being for some reason my 5Ghz wireless does not show up on my ROKU devices that did work at 5 GHz with Spectrum, and5Ghz does show up on up on most other devices. My wireless Brother printer will not successfully connect wirelessly on 2.4 Ghz. I had to takenet cable from the gateway to another router and it was able to connect to the lan connected router wirelessly on 2.4Ghz. The most important issues are cameras that worked fine remotely on Spectrum no longer work with T-mobilecameras unless they are operated locally on the same network as the app.