Virgin Mobile recently releases their Member Lounge iPhone app (available in both English and French). This gives Virgin customers the ability to get discounts at various places such as stores, restaurants, hotels and also win free concert tickets. In addition, the app allows you to check your account information: balance, pay bills and check and change your rate plan. Unfortunately when you access the account info section there is no WiFi connectivity so you’ll use data.
Search in iTunes for under Virgin Mobile Members Lounge