Learn how to find your Vi mobile number using USSD codes, app, customer care, settings and more. This article provides detailed instructions and tips for checking your Vi number instantly. Here are some of the steps to find your Vodafone Idea number easily. Step 1: Open the Phone or Dialer application on your Android or iOS device. Step 2: Dial "199# from your registered Vodafone Idea mobile number. Step 3: A flash message showing your Vi mobile number will appear on your smartphone. If you are a Vodafone Idea Vi customer then using Short codes or USSD Codes you can know your Vi mobile phone number details like My Balance, Internet Usage / Data Usage, Voice, SMS, Roaming Offers, 4G/3G/2G Internet Offers and other details all you need to do is from your mobile number dial below mentioned codes to know your desired information. Complete guide to Vi MMI code meaning and list of MMI codes . Check balance with "199#, activate DND, call forwarding and more using these essential Vi MMI numbers .