If you are having troubles connecting to your GO, and your phone version is Android OS 8.0 and above (Oreo), it means that you need to update your Upright GO.
Simply follow these steps:
1. Turn on your GO, and make sure that it's blinking blue.
2. Next, press the power button twice:
A short press, and immediately...
A long press: hold your finger for 30 sec until the GO is blinking red.
3. Next, go to the settings screen, logout from your account and then login again.
4. Once you're logged in again, go to the settings screen and tap the UPDATE button.
Then the app will start the device software update.