Minecraft Pocket Edition (PE) is available for iOS, Android, and Windows Phone. Select it from the search results. You will need to purchase Minecraft PE before you can download it. If you've already purchased it before, you can begin downloading it immediately. You will be able to find it on your Home screen or in your app drawer.

How would you rephrase that briefly using Chinese?
打开设备上的应用商店。 搜索“《我的世界》移动版”。 如果你还没有购买的话，先购买。 点击“安装”开始下载并安装《我的世界》移动版。