An Android phone can be turned into a Wi-Fi hotspot for free using a third-party app from the Google Play store or by turning on tethering in the device's settings. Using tethering directly from an Android device may require a tethering plan with the network carrier.
To turn an Android phone into a Wif-Fi hotspot using a third-party app, open the Google Play Store and search for tethering. Download the app of your choice and follow the instructions displayed on the app to complete the setup. Other devices should then be able to connect to the Android phone's Internet connection.
To turn on tethering in the Android phone's settings, navigate to the wireless and networks menu and select tethering and portable hotspots. From here, select Set up Wi-Fi Hotspot and enter a name for the network under the Network SSID heading and a password for the network if required. Once setup, ensure that the Portable Wi-Fi Hotspot option is checked and connect to the Internet on other devices by finding and pairing with that network.
If setting up tethering directly from the Android phone's settings doesn't work, a tethering plan may be required by the device's network. Should this be the case, using a third-party app can bypass the restrictions, however, it can also violate the wireless agreement with the network.