Glory 20pro system upgrade HarmonyOS system 2.0.0 has no sound.

1. If it involves WeChat (problem: all settings on the mobile phone are normal, but there is no sound or vibration in the WeChat notification, and the internal message settings of WeChat are fully open, and the volume of the mobile phone is fully open) or other applications, it depends on whether the computer has logged into WeChat, resulting in no sound on the mobile phone.

2. It may also be caused by low power. Some netizens have encountered that after updating the HarmonyOS system, every time the power reaches 25% or 30%, the vibration of the whole machine will stop, and it will resume when the charger is plugged in. This may be a BUG, so it is recommended to update the system to the latest version.