Call 1991 from your Jio number to check your Jio validity and SMS balance. After the call is terminated, you’ll get an SMS with information about the remaining time, SMS balance, and data balance. Learn how to check Jio plan validity using the app, SMS, USSD, and website. Stay informed and avoid service interruptions. Learn how to check Jio balance via missed call, USSD codes, online app methods. Quick methods for Jio prepaid balance check and validity .