let say...after flash to 503L modem radio and beta rom.....then i want to revert back to kitkat officiol 5O1L.... need to flash back 50iL mode radio?

http://forum.xda-developers.com/huawei-med...14#post57253214
to downgrade from lollipop beta, you'll have to extract .img files from your desired destination ROM zip file (use the soft "huawei update extractor"), install adb on your computer, and then "fastboot flash" the img files (system.img, and maybe boot.img)

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have link?