The Subscription Code not working.

There would be some reasons for subscription code not working.
Please check as below:
1. Please fill in the code number carefully one by one.
2. if still problem, please check whether installed the correct version apk.
There are two versions:
Standard Version, Blue color
Plus Version, Red color
Both are using different subscription code.
So please check which version subscription code in your hand, Standard or Plus Version? Then installed the correct version apk.
3. If above not help, please contact our support email directly.
4. If bought the wrong version subscription code, please contact us to exchange for you, but need to pay the balance if change from Standard version to Plus version.