The described is activated as it is the Nexus 9 after trying to get the latest update package to launch the Ota, and because Google closes a wall. Cause the update package cannot be downloaded.
Because it is the first boot, it cannot be set USB debugging, cannot adb to kill welcome process. Some people on the internet say that the new brush ROM solves this problem, so just consider how to download the installation package.
Fortunately, the installation package I encountered was only 17MB.
Steps to resolve:
1. Turn on the WiFi sharing feature in Windows and create a new virtual WiFi miniport adapter:
Win7:http://jingyan.baidu.com/article/8275fc86bf3c6c46a03cf6c9.html
Win8:http://jingyan.baidu.com/article/1974b289a6badaf4b1f774ba.html
2. Download the VPN login client and after successful login, share the VPN network to the virtual WiFi miniport adapter you just created. VPN I'm using this https://www.52vpn.net/html/9708642612.html. Note that this test account will be disconnected once every five minutes. Each time you re-connect, you share the VPN network again.
3. Get Nexus 9 to connect to the WiFi hotspot you just shared. The next step is to download the update package.
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4. After the download is complete, the system restarts and installs the update. Complete. Nexus 9 Perfect boot. and ate Android lollipop!.
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How to complete the Nexus 9 power-on activation process