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Distribute Wi-Fi in Windows 10 without a router
If you have Windows 10 installed on your device, then you can activate the Internet distribution from the computer itself.
1️⃣. Using the WIN + I key combination, open the "Settings" window and go to "Set i Internet" → "Mobile hot-spot". Here is the network name and password. If you want, you can change them by clicking the "Edit" button.
2️⃣. Move the slider at the top of the window to the On position.
📝 Source: @trojan_anonym