1.更新原生系统到最新版
http://www.onekeyrom.com/help/lg_p880_18071.html
LG最新版官方固件：
http://csmg.lgmobile.com:9002/csmg/b2c/client/auth_model_check2.jsp?esn=352967052311812
2.ROOT 一键
3.解锁bootloader
命令：http://forum.xda-developers.com/showthread.php?t=2224020
APK：http://forum.xda-developers.com/showthread.php?t=2251407
4.使用Rommanager刷入Recovery
5.下载CM ROM和GApps，进入Recovery双清后刷入