Just activate tethering and scan QR code with other devices to connect to the hot spot.
Note that some devices may need to scan twice as first scan just add hot spot to known network list.
Hot spot QR share allows you chose between your favourite network configuration and a network with a random name and password generated each time Wi-Fi tethering is started that you can share without worrying of giving someone a durable access to your data connection.
BEFORE USING THIS REMEMBER:
This application enable local Wi-Fi tethering capability of the device.
Enabling this capability allows sharing data connection of the device with other devices.
By using this application you understand that all connected devices will use this device data connection. Sharing your data connection may be forbidden, charged separately or require a specific contract with you carrier. If you are unsure on how your contract manages Wi-Fi tethering verify with your carrier.