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Please make sure you are purchasing the correct version; otherwise, the stones will be irreversibly deleted by the game's system.

Once the data download is finished, change the provided account to your private account so you can be sure that nobody else will have access to it using the following steps:

1. Go to Menu

2. Tap Data Linking & Backup

3. Click Google Account Linking

4. Unlink the current Gmail account

5. Click Google Account Linking again

6. Link your personal Gmail account 

No refunds for "changed my mind," "wrong version," or "don't want it anymore."

Once purchased, the account is yours.