Fitbit Charge 4 Fitness Tracker - Black

To explore the compatibility of your device, please click here.  On this page, you will be able to select your device type & view all of the available features within the Fitbit app.

If you can’t hear sounds on your phone, check the following: 

• Check that the volume is turned up. 
• Check that silent mode has not been available. 
• Inspect the speakers for any visible debris that may be blocking the sound. Remove with a soft brush if necessary. 
• Reboot the phone by turning off and on. Alternatively, press and hold the Power and Volume Up button for 15 seconds. 
• If the sound issue only occurs on a specific app, check for any app updates. 
• Check your phone for any software updates. If available, update the software. 
• If your phone has Do Not Disturb mode, try turning this off. This mode silences sounds and notifications. 
• If you are using headphones, check that the headphones are secure in the phone. If necessary, try another pair of headphones to determine if the headphones are not producing sound rather than the phone. 
• Check if your phone is connected to another Bluetooth device and disconnect if necessary for the sound to come out of the phone direct. 
• Perform a Factory Reset. Please note, this will erase all data and settings from your phone. 

Click here to read our full article on what to do if you can't hear sounds on your phone.

If you can’t make calls, but you can receive them, check the following: 

• Check that you have sufficient signal by looking at the signal strength. 
• Visit your network provider’s website to check if there are any disruptions in your area. 
• Check that you have not accidentally activated call restrictions such as call-blocking. 
• If you have a prepaid SIM, check that you have sufficient balance and top up if necessary. 
• If you are in an area where you should be roaming, check that your roaming settings are enabled. 
• If you use Voice over LTE (VoLTE) check that this is turned on. 
• Check that your network settings are up to date. Contact your network provider for the latest settings.  
• Try the SIM card in another phone to check if it is an issue with the SIM itself. 
• Reboot the phone by turning off and on. Alternatively, press and hold the Power and Volume Up button for 15 seconds.

If the issue remains, we recommend contacting your network provider for further support. 

If your mobile data isn’t working, check the following:

• Check that you have sufficient signal by looking at the signal strength. 
• Visit your network provider’s website to check if there are any disruptions in your area. 
• Check that mobile data is turned on. 
• If you are roaming, ensure that you your roaming settings are correctly configured.  
• Check that the Access Point Name (APN) settings are correct on your phone. 
• If you have set a data usage limit on your SIM or phone, check to see if this has been reached. 
• Try the SIM card in another phone to check if it is an issue with the SIM itself. 
• Reboot the phone by turning off and on. Alternatively, press and hold the Power and Volume Up button for 15 seconds.

If the issue remains, we recommend contacting your network provider for further support.