I forgot my JioFi number. How to know my JioFi number?

You can know your JioFi number in following 2 ways –

Option 1: Using MyJio App
Open MyJio App and login with your Jio ID & Password. View your Jio Number at the top of the screen
Option 2: By sending SMS
SMS Jio <IMEI> to 199 from any Jio number

Note: If you wish to send SMS from any Non Jio number, send the SMS to 7021799999
You will receive an SMS with the Jio number associated with the specified IMEI
Example:
SMS Jio 123456789123456 to 199 or 7021799999
Note: To see your JioFi IMEI number, open the battery compartment and remove the battery. Or, you can also find the same on the original JioFi box.