A Dear friend, Please check whether your audio Bluetooth and APP Bluetooth have been successfully connected to your watch.The first step: Please confirm whether your watch (T42) is successfully added to the app (DaFit), confirm that the connection to the app (Dafit) is successful, and it shows that it is connected.Step 2: Open the phone settings, turn on Bluetooth, find Audio_T42, and click it to connect.Step 3: Open Da Fit APP, find FAVORITE CONTACTS, click in, Add quick newsletter, check 8 contacts, click Confirm, contact data transferring... to complete the contact import.If the above operation still fails to connect, please uninstall the APP. Re-download the APP, re-connect Bluetooth and re-import contacts following the above steps.I am very happy to serve you. If you have any questions, please contact the after-sales mailbox. We will provide 7*24 hours After-sales service, we will definitely give you a 100% solution.Best regards