The capability allows a device to share its cellular data connection with other devices via Wi-Fi, Bluetooth, or USB. This functionality transforms a smartphone or tablet into a portable internet access point, enabling other devices to connect to the internet even when a traditional Wi-Fi network is unavailable. For example, a user could enable this feature on their phone to provide internet access to their laptop while traveling.
This tethering method offers several advantages, including increased connectivity in remote locations and the elimination of the need for multiple data plans for different devices. Historically, limitations in data speeds and battery life made the widespread adoption of this technology challenging. However, advancements in cellular network technologies and device power efficiency have significantly improved the user experience and expanded its utility.