Why is there a sound in the incoming call of iphone 4s and no sound in the SMS?

The reason why iphone4s has a voice when calling and no voice when texting is because the voice of SMS is independent. After mute is set, there is no sound when the text message comes in.

The steps for setting SMS sound are as follows:

First, point setting;

Second, notice;

Third, integral information;

Four, when the "license notice" is in the open state, it is possible to make a sound;

5. Click on "Notification Sound" and select "Reminder Ring" of SMS. The top one is "none", which means that there is no sound when the text message comes, and everything else is audible.

What if Apple's mobile phone suddenly loses sound?

① Press and hold the power button for a long time, and when the power off option appears, please slide to turn it off;

② Then press the power button to turn it on, and the Apple logo will appear on the screen. Do not loosen the power button;

③ Then press and hold the Home button on the home screen until the screen turns black;

4. When the screen is black, please release the power button and continue to press and hold the Home button on the home screen until iTunes on the computer side appears and detects that an iPhone is in recovery mode;

Note: If you can't enter the recovery mode, please operate it several times.

Then click the Restore iPhone button in the iTunes window.

ITunes will then connect to Apple's update server to detect the latest iOS firmware system suitable for the current mobile phone, and prompt us whether to delete the data and restore it to this version, and click the "Restore" button.

Finally, wait for iTunes to download the firmware needed for recovery from the network, and then restore the firmware system to the mobile phone. As the firmware is downloaded from the network, it will take some time. Please be patient. After the phone is restored, reactivate the phone according to the on-screen prompts. After activation, connect to iTunes to restore data.