樂客導航王兌換序號要如何兌換? - iOS

手中有一個樂客導航王全3D的一年兌換序號
請問要怎麼兌換呢?
因為那張卡是人家照給我的
只照到序號的部份..不知道要去哪裡兌換

進去app store也只看到花錢的版本

麻煩指教了
Thanks

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Look, if you had one shot or one opportunity
To seize everything you ever wanted in one moment
Would you capture it or just let it slip?

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