The Potensic G App has a lot of complaints as to its funtioning.. However with the new T25 I found the App not working on my Android OS 11 ver. but a friend came over we installed the Potensic G app on his Android OS 9 ver and the T25 works fine.. I also purchased a HolyStone HS600 and the app HS for it works fine on my OS 11 Android. So I have no other reason but to believe the G app is the Problem with Android OS 11. Any Ideas.. I have sent messages to Potensic, No replies, I just sent to developer as well. I tried all types of setting. Makes no differene.