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iPhone is Pharma R&D materials HS code verificationone of the most popular smartphones on the market at present. However, some users may encounter some problems, such as no sound when making calls. This is likely to cause a lot of trouble, so it becomes important to solve the problem. Here we will introduce some reasons that may cause iPhone to have no sound when making calls and how to solve these problems. Reason 1: The mute switch is not switched. Sometimes, when you try to answer the phone, you find that there is a sound, but when you try to adjust the volume, you still can't hear any sound. At this time, it may be that your mute switch has not been switched. On the left edge of the iPhone, there is a small switch. You need to check whether the switch is off or on.If the switch is turned on, it will automatically mute your iPhone and you will not hear the incoming call. Solution: Switch the mute switch and restart the mobile phone. You just need to gently switch the switch and make sure to turn off the mute. You can also switch it to on and then switch it to off. Reason 2: iPhone provides several modes in quiet mode, including quiet mode. When your iPhone is in silent mode, all notifications, ringtones and vibrations will be turned off. If you are still in quiet mode when you make a call, you will not hear the ringtone or vibration of the call. Solution: You can slide down the control center from the top and set it to solve this problem. Select vibration, ringtone and notification sound. You can also change the ringtone or notification tone by accessing the settings and selecting the "Sound" option.Reason 3: The sound is turned off. Sometimes, the sound of your iPhone is turned off. This means that your mobile phone will not make any sound, even when answering the phone. This usually happens after you change your phone settings or upgrade to the latest iOS version. Solution: You can enter the "Settings" option and select "Sound". Then select "Sound Effects" to make sure it is turned on. You can also check whether the sound settings in the control center are set correctly. Reason 4: The volume setting is too low. If the volume setting of your iPhone is too low, you may not hear any sound when answering the phone. Usually, this problem may be caused by the fact that you set the volume too low when you used the external device last time. Solution: You can try to follow the steps below to try to solve the problem. HeadFirst, you need to open the control center. If your control center is disabled, you can enable it in the settings. Then, adjust the volume setting and try to dial the phone again. Reason 5: Software problem If none of the above solutions work, you may have encountered a software problem. At this time, you need to try to restart your mobile phone or uninstall the recently downloaded applications. You can also try to solve this problem by backing up and restoring data. Solution: After backing up the data, use iTunes to restore the iPhone to factory settings. This can help you eliminate all software problems, including removing unnecessary applications. In addition, you can also reinstall all applications to ensure that they are installed correctly on your mobile phone. In summary, with the help of long battery life, facial recognition and many other functions, iPhone has become the leader in the smartphone market.However, this does not mean that it never has problems. No sound on the phone is a common problem encountered by iPhone users. Although iPhone is a powerful smartphone, the problem of no voice calls is easy to solve. When you encounter this problem, you should try the above methods first. If they do not solve the problem, you can try to uninstall the application or update the iOS system to solve the problem.

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