Now Vodaphone and Idea are joined; they are running some promotional offers. If you are a member of Vodafone or Idea, you can check VI used codes.
Contents
Check your mobile number on VI:
I found no used code to check the mobile number. You can download the Vi app. 
Vi USSD codes for Vi prepaid customers:
| VI USSD Code Usage | Vi ussd codes for Prepaid |
|---|---|
| 4G/3G/2G Internet Offers | *199*1*3# |
| Chhota Credit | *199*1*6# |
| Get Vi app | *199*4# |
| Internet Usage/Data Usage | *199*2*2# |
| My Balance | *199*2*1# |
| Recharge Offer | *199*1*7# |
| Start VAS | *199*3*2# |
| Stop VAS | *199*3*1# |
| Voice, SMS, Roaming Offers | *199*1*8# |
if you want to check Vodafone and idea network’s mobile numbers, use this USSD Code.
Check here how to check Vodafone’s balance.
Vi USSD codes for Vi postpaid customers:
| VI USSD Code Usage | Vi ussd codes for Postpaid |
|---|---|
| Activate new Data Packs | *199*1*3# |
| Amount Due Rs. XX due date DD-MMM-YYY | *199# Amount Due |
| Billing and Payment | *199*2# |
| Data Usage | *199*1*2# |
| Get Vi App | *199*4# |
| My Tariff & Activate New Tariff | *199*1*1# |
| Roaming Packs | *199*1*4# |
| Start/Stop VAS Services | *199*3*1# |
| Voice, SMS Packs | *199*1*5# |
Conclusion:
Please comment below if any codes are not working; I will update you soon.