Just a quick PSA that I hope can help someone out. If you experience Fujifilm X100T Wi-Fi app connection issues using the Fujifilm Wi-fi App to connect your camera to your Android device, change your phone’s “name” in the app settings, then on the camera, “Change access point” so that it searches for a new device.
It seems like if the app remembers your phone’s old name and tries to connect, it will fail. However, if it searches for a new device, it will connect. I hope this helps!