Dial `##002#` and press call
Dial `##21#` and press call
Dial `##61#` and press call
Dial `##62#` and press call
Dial `##67#` and press call
Open the Phone app
Tap the three-dot menu
Go to Settings
Tap Call settings
Tap Call forwarding
Turn off all forwarding options
Restart your phone
Contact Jio customer care if forwarding still remains