Dial `1299` from your Jio number and follow the voice instructions
Call `198` or `199` from your Jio number and ask customer care
Open the MyJio app and check your SIM/number details
Check the SIM card pack or welcome letter if available
Insert the Jio SIM in a phone and check the number in phone settings
Send an SMS or make a call to another phone and check the displayed number
Visit a Jio Store with valid ID proof for assistance