Given that the pedals are charged, the most common reason for this is that some other device is still using the Bluetooth connection of the Pedals. X-Power only supports one Bluetooth connection at a time. If you are using Bluetooth to connect to your head unit or watch, make sure the device is turned off or out of range when you try to connect the pedals to your phone, and the other way around. Another reason for the pedals not showing up when you want to connect to them, can be that they are currently charging. As long as you have a charger connected to the pedals, Bluetooth is turned off.