In addition, do not forget that SIM cards intended for modems usually do not work in smartphones or tablets, and you will not be able to distribute the Internet using them.
More tips, related to the use of mobile devices can be found here .
There are several ways to distribute Wi-Fi. I describe all of them in more detail with screenshots here https://softcatalog.info/ru/article/kak-razdat-internet-s-telefona. I will immediately give links to the necessary sections of the article:
Now for those who are too lazy to follow the links.
Option 1: Go to the Market, put FoxFi or Osmino, open the application, grant permissions, come up with a name and password for the network, click the "Share" button or put a checkmark in front of WiFi Hotspot (depending on which application you installed).
Option 2: We go to the "Settings" of our phone in them we need the item "Networks", or "Wireless networks", or "Network and Internet", or "Connections", or "Connections and Sharing "(depends on the Android version and the manufacturer's shell). Next, look for "Modem mode" or "Sharing", "Wi-Fi hotspot" or "Wi-Fi hotspot settings". We choose her name, enter the password, activate and connect on another device. On some firmware, for example, it is easier to implement, for example, MIUI allows you to connect to other devices on MIUI using a QR code, i.e. you click on the created Wi-Fi donor on the smartphone - the recipient, and the donor will display the code on the screen, take it off with the standard Xiaomi "Scanner" and you are online.
In order to distribute wi-fi, you need to enter the settings, go to the "Wireless networks" section and click the "More" button. Then go to the "Modem Mode" tab. Here you need to select "Wi-fi access point". In the window that opens, click "Configure wi-fi access point" in the pop-up window, you will need to specify the name of your point and the password to it. Then turn on the toggle switch “Access point wi-fi.” All your smartphone distributes the Internet via wi-fi