When you need an internet connection for another device, share your phone's:
Your cellular plan must support data sharing. If you don’t know, contact your carrier.
Check that:
Tap Wi-Fi hotspot and do any:
When your hotspot is active, you'll see 
Set up the connection.
| To connect | Do this |
|---|---|
| A phone |
|
| Other device |
|
If you're getting a warning about weak security for your hotspot, set a strong hotspot password. Also, secure your hotspot by selecting a protocol:
Adjust settings:
To see the number of devices connected to your hotspot:

By assigning a password for your hotspot, you ensure that people can't connect to your hotspot without your knowledge or permission.
To disconnect all devices and prevent them from reconnecting:
If you’re experiencing performance issues, you can limit the number of connections allowed or temporarily disconnect devices.
Do any of the following:
To allow only specified devices to connect:
To restrict access for a previously allowed device, tap the device name, then tap Delete.
To connect a device to the internet using your phone's cellular data and a USB cable:
Connect your phone to your computer with a USB cable.
Turn on USB tethering to start the connection.
You'll see 
To stop the connection, tap the notification and turn off USB tethering, then disconnect your phone and computer.
To connect a device to the internet using your phone's cellular data and a Bluetooth connection:
Turn on Bluetooth tethering to start the connection.
To stop the connection, turn off Bluetooth or touch & hold 
If you're having issues, try these troubleshooting steps: