Check IMEI number of your OPPO F5 (type *#06#) or search at the back of your OPPO F5 phone box.
Register your IMEI number here.
Fill in your personal details and wait for validation process. FREE Joker code will be given through EMAIL.
Once you get the code, enter to AOV game and click on "Event" button.
Click on "Announcements", then choose "Item Code Redemption".
Enter the given code and redeem it. FREE Joker will be sent to your account directly.