There is a high probability of knowing whether the other party is an iPhone user!

When using a smartphone, you should know whether the person in contact is using the iPhone or Android.You don't have to know the terminal name/model name, but if your opponent is the same iPhone user, you can reduce your expenses.You can use "FaceTime Audio" instead of telephone (carrier voice call), and "IMESAGE" instead of SMS/MMS.

However, the information of the other person in hand is that the name, address, and email are at best a phone number.Whether the other person is an iPhone user or an Android user is an ambiguous memory.

You can tell if your opponent is an iPhone user if you have a mobile number or email address.It is assumed that the other party is using the mobile phone/smartphone that the other party is usually carrying, but if the information registered in the iPhone's "contact information" should be a considerable probability.

The procedure is easy, just open the other party's page with "contact information".If the FaceTime section is displayed and there is a video camera and a handset icon there, the opponent's mobile number or email address is attached to the Apple ID, that is, the probability of an iPhone user.

If FaceTime is turned off with the opponent's iPhone (or other devices signed in with Apple ID), the FaceTime section described above is not displayed.The Apple ID is attached to the email address because it may not be a mobile number (FaceTime is used on iPad or Mac).Before contacting the other party with FaceTime, it would be better to check in other ways, such as email.