First of all you have to go jio's official recharge portal Click Here
Then you have to enter your jio number and hit submit button and wait
Now there you can see JIO PRIME 99 plan click on it and it will be on your cart
Now go for payment option,Now you can see many option like this
Click on jiomoney and click on make payment
Complete the recharge with jio money portal and Use your debit card or credit card for this recharge and you should download JIO MONEY app from playstore
After completing the recharge you will get 50 rupees cash back
Now you have to do 303 recharge same way and you will get 50 rupees cash back
So You benefit are 50+50=100 rupees means your prime is free and you have have earned 1 rupees