No, Mobile Hotspot comes preinstalled on compatible devices. Depending on your device, it may be in your App menu or Settings. It may also be named something different than Mobile Hotspot, like Personal Hotspot (iOS), Internet Sharing (Windows) or Portable Wi-Fi Hotspot (Google Nexus devices). But these all do the same thing.

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Jan 22, 2019

How to set up a Personal Hotspot on your iPhone or iPad

May 09, 2020

How to Use Your Android Phone As a Portable Wi-Fi Hotspot Nov 09, 2019 Share an internet using Wifi hotspot on Windows 10 ⋆ BEST Oct 08, 2019 How to use wireless hotspots in Windows 10 » OnMSFT.com