Due to the recent iOS 13 update with Apple, Bluetooth sharing settings have changed for individual apps including the Myzone app. This OS update is only available for users who have phone models 6S and above. Any phone models lower than 6S, the below steps will be irrelevant.
After updating your phone's OS system, you will now need to allow your phone to share Bluetooth data with the Myzone app for your belt to read onto your Myzone app properly. Here’s how:
1: Open your phone’s general Settings.
2: Once inside Settings, scroll down and click on Myzone.
3: Once inside Myzone, switch on Bluetooth Sharing.
4: Navigate back to the Myzone app and click on your Workout Tile. Your live tile will display if you are wearing your Myzone belt and it is reading your HR.