手机 DIM G4，YunOS(大致是android 4.4)，CPU: Mt6735M ，1G RAM 16G ROM
现 象：
- 插上电源显示“正在充电”
- 显示开机图片后停止
- 按电源 音量减可进入recovery模式（恢复出厂设置后问题依旧），再选fastboot可进入fastboot模式
- 用fastboot命令可连接上手机，但用fastboot flash XXX方式刷机出错（yunOS都不能用此法和SP FLASH TOOL等常用的方式来刷机），需对应专用的SmartPhone MDT工具。
MTK驱动正常
adb/fastboot可连手机
fastboot刷机错误 如下：
c:\adb\adb32>fastboot flash boot C:\tmp\P7911FN_XINMH_D2_3_ALY_SEC_V2.0.4\sign_out\boot.img
target reported max download size of 134217728 bytes
sending 'boot' (6860 KB)...
OKAY [ 0.725s]
writing 'boot'...
FAILED (remote: image is not a boot image)
finished. total time: 0.764s
c:\adb\adb32>fastboot flash recovery C:\tmp\P7911FN_XINMH_D2_3_ALY_SEC_V2.0.4\sign_out\recovery.img
target reported max download size of 134217728 bytes
sending 'recovery' (7460 KB)...
OKAY [ 0.786s]
writing 'recovery'...
FAILED (remote: image is not a boot image)
finished. total time: 0.813s
c:\adb\adb32>fastboot oem reboot-recovery
...
FAILED (remote: not support on security)
finished. total time: 0.005s
c:\adb\adb32>fastboot reboot-bootloader
rebooting into bootloader...
FAILED (remote: not support on security)
finished. total time: 0.007s
用SmartPhone MDT-Update -SW Ali-YunOS专用工具刷入原厂固件解决：
一、下载原厂固件，在百度里搜这串号码P7911FN_XINMH_D2_3_ALY_SEC_V2.0.4.rar更易找到。手机型号还没有底层版本号好用！[呲牙]
固件
