How to add a card
1. Open the "Fitbit" application on your phone and navigate to your watch or tracker settings
2. Tap "Wallet" and follow the on-screen instructions to add your card, which include the creation of a 4 digit passcode which will be used for your purchases
3. Complete the process by entering to the app the One Time Password (OTP) that you will receive by SMS on the mobile phone which you have declared to the Bank