Please try to refer to the steps below to solve the issue:
1. Refer to the user guide to check if there is an operation issue.
2. Try operating multiple times.
3. Try reconnecting to WiFi and Bluetooth, and try switching to WiFi.
4. Reduce the distance between your phone and headphones, and keep them away from other electronic devices such as microwave ovens and routers.
Update: During activation, the device screen may prompt you to perform a system update, which may require multiple attempts; simply follow the on-screen instructions. The update should take approximately 30 minutes to complete.
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