Set up your device as a mobile hotspot and share your data connection with Wi-Fi-capable devices.
INSTRUCTIONS & INFO
Use your AT&T device as a mobile Wi-Fi hotspot to share your data connection with Wi-Fi-capable devices such as: other smartphones, tablets, netbooks, MP3 players, and more. To set up Personal Hotspot, from the home screen tap Settings. Note: Eligible data plan required, learn more.
Tap Personal Hotspot.
To turn on or off, tap the Personal Hotspot switch.
To change the Personal Hotspot password, tap Wi-Fi Password.
To change the network name from the home screen tap Settings > General > About. Tap the first line, which displays the name of your device. Rename your device using the on-screen keyboard, then tap Done. Note: The Personal Hotspot network name is the same name as your iPhone. Learn more from Apple support article: Change the name of your iPhone
When devices are connected to the Hotspot Wi-Fi network, 'Personal Hotspot' and the number of devices connected will display in the notifications bar. Note: Learn more from Apple support article: Share your Internet connection with Personal Hotspot. If you can't join a Personal Hotspot or can't connect to the Internet using a Personal Hotspot, get help.