A Unity ID allows you to buy and/or subscribe to Unity products and services, shop in the Asset Store and participate in the Unity community.
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I had the same problem. Solution is the Drop Down Layer you can see it here: http://fs5.directupload.net/images/160107/w6q9p8d9.png
Thank you, with this post i could check everything step by step. What i did: At first i installed the samsung usb drivers. Then the Google usb...