Hello Escape Rocks! You solved my problem. I was an early adopter of the DCS app; however, I became extremely frustrated because I repeatedly received "WIU/TIU not found." I use my WUI as a standalone, i.e., I do not have it connected to my home router. Earlier today, after searching this forum, I saw your suggestion about using "airplane mode." I spent about 2.5 hours running my trains today. After setting my cell phone to airplane mode, the phone never displayed the WIU/TIU not found message.
Although this thread is focused on the iPhome, your suggestion worked on my Android phones. A couple of years ago, I purchased a used Motorola Android for dedicated use with my trains. I have another Android for my daily cell phone activities. Finally, after three or more years, I'm enjoying using the app. Nonetheless, I still use my handhelds and, in some ways, like them better than the app.
MTH hasn't provided much support for the app (or any of its products) in recent years. If MTH had posted your airplane mode suggestion on its (wildly out of date) web site, that would have spared me and, perhaps, others many hours of frustration.
Again, thank you. I'm really hoping that this fix continues working.
