http://www.androidpolice.com/2015/01/30/google-posts-android-5-0-2-lollipop-system-images-2012-2013-nexus-7-mobile-data/
缩 http://goo.gl/1W8Dzf
就在Android Police发文吐槽还有两台Nexus 7至今未收到Lollipop的隔天，Google
终于发布了，不知道是不是巧合
总之各位可以开刷了
Factory Image
https://developers.google.com/android/nexus/images
懒人连结
2012 3G
https://dl.google.com/dl/android/aosp/nakasig-lrx22g-factory-408cc97e.tgz
2013 LTE
https://dl.google.com/dl/android/aosp/razorg-lrx22g-factory-2ce5202c.tgz