A：1. If the static sound is intermittent and probabilistic, it may be a network issue. Please check if your phone signal is full. If calls are intermittently interrupted in areas with weak signal or strong interference, it may be caused by a network problem, which is normal. Please try using the phone in an environment with better signal.
2. Please use a standard wired headset or speak to see if there is any improvement. If there is improvement, the microphone may be faulty and needs to be repaired.
3. If the earpiece makes a "buzzing" sound at high volume, and the network is stable, the possible reasons are as follows: Excessive volume can be uncomfortable; please lower the volume appropriately. Some people have fuller voices, and the human ear is particularly sensitive to these frequencies, so a slight "buzzing" sound may be heard when speaking to certain people. This effect is more noticeable for users with more sensitive hearing.
4. For users who need to use their phones for extended periods in high-volume scenarios (such as noisy environments), it is recommended to use a headset or other auxiliary device to make calls.