The "Internet sharing" button of the Control Center, what role?

Press and hold the area with the Wi-Fi or Bluetooth button on the upper left of the control center, and a large vertical area will appear.It is an area used to turn on/off in -flight mode or change the range of AirDrop, but it seems that the use of the "Internet share" button at the bottom right is not known.

This "Internet sharing" button is used to turn on/off the function of using the iPhone as a modem.When tapped, the button turns green, the connected Wi-Fi is cut, and the status changes from "impossible to detect" to "detected".

If the status of the button can be detected, the iPhone will work as a Wi-Fi access point that uses the name of the iPhone (setting → information → general → that can be set by name) as a Wi-Fi access point that uses the iPhone as SSID.If you use a Wi-Fi device such as a personal computer and display the surrounding Wi-Fi access point, the name of your iPhone should be displayed.

This is the so-called "tethering", which allows you to connect the Wi-Fi compatible device to the Internet using the mobile line of the iPhone (which cannot be connected to your mobile line on your own).

However, it is an exception if the surrounding Wi-Fi-compatible device is signing in with Apple ID such as Mac or iPad, and with the same Apple ID as the iPhone.Regardless of whether the "Internet Sharing" button is on/off, you can start the Internet connection on the iPhone mobile line by operating the connection from the Mac or iPad.This convenient function for this Apple product is called "instant hot spot".

While the iPhone is tethering, the status column of the "Internet Sharing" button changes to "Connection of ○ Case".Up to 5 units can be connected to the Internet via iPhone, so it is useful when you want to use a computer or game console in a place without Wi-Fi.Tethering is optional depending on the communication carrier, and if the contract is not contracted, the "Internet sharing" button does not work.