If you enter the 6-digit Unlock Code incorrectly for 3 times, it will lock your Citi Mobile Token AND your login password. You can reset your 6-digit Unlock Code by first resetting your online banking login password. After resetting your login password, you can login to Citi Mobile and follow the steps mentioned below to reset your 6-digit Citi Mobile Token Unlock Code. Step 1: Go to the Profile option. Step 2: Select "Manage Citi Mobile Token". Step 3: Select "Reset Unlock Code".