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If you are an iPhone user, you can use the free voice call service "FaceTime audio" operated by Apple.The amount of data is small because of the voice only, and it is overwhelmingly cheaper than the voice call of communication carriers.If you use a mobile line, communication costs will be charged, but even if you connect to Wi-Fi, there will be no small communication costs.
Similar services include FaceTime, but FaceTime audio is only audio.Since the camera is not used, you do not need to prepare before calling.As of 2020, most iPhone users can call with FaceTime audio as of 2020, as iPhones are running after iOS 7 or later.
When talking with FaceTime audio, enter your opponent's mobile phone number or email address in the FaceTime app.In this case, the other party must use the iPhone and specify the mobile phone number/e -mail address registered in the opponent's "FaceTime adhesion contact information".
However, it is conceivable to ask if you are using the iPhone for the person you are trying to talk about, or whether the email address is registered as FaceTime.Opening the screen in the order of "Settings" → "FaceTime", checking "FaceTime adhesion contact contact information", etc., seems to be troublesome.
Therefore, we use "contact information".When the name, telephone number, and email address are displayed, contact the Apple server, and if the phone number/e -mail address is registered as FaceTime, the line "FaceTime" will appear.increase.In the case of an unregistered phone number/email address, it does not appear, so it is a judgment material for whether FaceTime can be used.
After that, tap the receiver button displayed on the FaceTime line to start the call, and the information of the other party will be displayed on the phone application screen.You can also register for "frequently used items", so why not use it?