What about the Apple 12 sound jam?

The signal is not good. If the signal is not good, please go to an open and barrier-free place outdoors to receive the signal better so that you can hear the sound.

Network problem, it is recommended to use it on WIFI or 4G network. If there is a sudden jam, it is recommended to restart the phone and try again. If the problem cannot be solved after restarting the phone, the factory settings can be restored (it is recommended to make a backup before operation). If the expected state of the mobile phone cannot be reached after the above troubleshooting, it is recommended to go to the after-sales outlets for testing or choose to buy other suitable iPhones according to personal economic conditions.

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Precautions:

Don't answer the phone when the battery of the mobile phone is low: Try not to answer the phone when the battery of the mobile phone is lower than 20%. The radiation at this time is 1000 times higher than usual.

Dialing and answering: Try not to take the initiative to call. Research shows that the radiation of dialing is much greater than that of answering. When dialing out, keep the phone away from your brain before the other party connects and after a few seconds.

At the moment of connection, the mobile phone is far away from the head: because the signal is unstable when the mobile phone is connected by dialing, the working rate is the highest and the radiation is the largest, and the situation will improve after stability. So remember to stay away from your head when connecting.