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Hi @Lanky21
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In the case of Android, your collected boosters is stored in phone memory. This stored boosters can not be synced with the server, because the game studio still does not have this process. You will not be able to transfer the boosters to another device, you will lose the complete boosters and for app uninstalling or crashing. And the boosters are not refundable.
I'm so sorry to say this but it's very real😥