Preparation for flash Android Original image for Nexus 5:
1) Hardware:
A Nexus 5 phone & an well connected USB cable;
2) Software: (through VPN)
1> SDK Platform Tools from 'SDK Platform Tools' ;
2> Android images between Factory Images & Full OTA Images;

一、进入 Recovery Mode 的两种方式：

1、硬键启动：关机、同时按下电源键、音量上键、音量下键;
音量键上下选择，电源键选中确定；进入后，见到病倒小机器人，press Power Button + Volume UP.。
2、软件启动（ADB命令行）：
1>Connect your phone to your PC through the USB cable;
2>adb devices;
adb reboot bootloader;
adb reboot recovery;
When a small Android appears, press Power Button + Volume UP;
Choose Apply update from ADB;
adb sideload OTA_UPDATE_FILENAME.zip
PS:

参考文献：
[1] 丰生强. Android软件安全与逆向分析. 人民邮电出版社. 2013.
[2] eaeK9s2c8@1M7s2y4Q4x3@1q4Q4x3V1k6Q4x3V1k6%4N6%4N6Q4x3X3g2&6L8%4g2@1N6h3u0W2i4K6u0W2j5$3!0E0i4K6u0r3N6$3q4@1j5$3S2Q4x3@1k6$3i4K6y4p5M7X3c8e0g2@1y4p5z5p5W2%4g2V1f1`.
[3] Bruce Eckel. Thinking in Java. Prentice Hall. 2006.
[4] 130K9s2c8@1M7s2y4Q4x3@1q4Q4x3V1k6Q4x3V1k6X3L8%4u0#2L8g2)9J5k6i4S2V1j5g2)9J5k6r3c8W2N6X3g2D9L8%4m8W2M7Y4y4Q4x3X3g2U0L8$3#2Q4x3V1k6Y4L8$3!0Y4L8r3g2Q4x3X3c8F1k6i4S2#2M7#2)9J5k6o6g2Q4x3V1k6Y4k6h3&6W2M7X3q4D9i4K6u0r3N6s2g2@1L8%4u0A6j5h3I4Q4x3X3c8Z5L8%4N6Q4x3X3c8@1L8#2)9J5k6r3k6D9j5i4y4Z5i4K6u0V1k6X3q4U0N6r3!0J5P5g2)9J5k6r3W2E0j5h3N6W2i4K6u0V1N6o6t1#2x3e0x3%4x3o6p5`.
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