[One (M7) Q&A, Help & Troubleshooting] ExcesusNL:
C:\Android>fastboot flash zip firmware.zip

sending 'zip'... (48659 KB) OKAY

sending time = 2.824 secs

writing 'zip'... (bootloader) zip header checking...

(bootloader) shift signature_size for header checking...

(bootloader) zip info parsing...

(bootloader) checking model ID...

(bootloader) checking custom ID...

(bootloader) start image[hboot] unzipping for pre-update check...

(bootloader) start image[hboot] flushing...

(bootloader) [RUU]WP,hboot,0

(bootloader) [RUU]WP,hboot,99

(bootloader) [RUU]WP,hboot,100

(bootloader) ...... Successful

FAIL90 hboot pre-update! please flush image again immediately

FAILED (remote: 90 hboot pre-update! please flush image again immediately)

For "hboot-preupdate" response, restart the same procedure for device FA38FW9020

12...

sending 'zip'... (48659 KB)

Got this after fastboot oem rebootRUU when I tried fastboot flash zip firmware.zip.. Same error as I had with the .30 version

EDIT

: After trying a couple of times I got this:

C:\Android>fastboot flash zip firmware.zip

sending 'zip'... (48659 KB) OKAY

sending time = 2.817 secs

writing 'zip'... (bootloader) zip header checking...

(bootloader) shift signature_size for header checking...

(bootloader) zip info parsing...

(bootloader) checking model ID...

(bootloader) checking custom ID...

(bootloader) start image[hboot] unzipping for pre-update check...

(bootloader) start image[hboot] flushing...

(bootloader) [RUU]WP,hboot,0

(bootloader) [RUU]WP,hboot,99

(bootloader) ...... Successful

FAILED (status read failed (Too many links))

EDIT2

: After trying 1 more time, it gave me this:

C:\Android>fastboot flash zip firmware.zip

sending 'zip'... (48659 KB) OKAY

sending time = 2.817 secs

writing 'zip'... (bootloader) zip header checking...

(bootloader) shift signature_size for header checking...

(bootloader) zip info parsing...

(bootloader) checking model ID...

(bootloader) checking custom ID...

(bootloader) start image[adsp] unzipping & flushing...

(bootloader) [RUU]UZ,adsp,0

(bootloader) [RUU]UZ,adsp,16

(bootloader) [RUU]UZ,adsp,26

(bootloader) [RUU]UZ,adsp,37

(bootloader) [RUU]UZ,adsp,49

(bootloader) [RUU]UZ,adsp,60

(bootloader) [RUU]UZ,adsp,71

(bootloader) [RUU]UZ,adsp,82

(bootloader) [RUU]UZ,adsp,94

(bootloader) [RUU]UZ,adsp,100

(bootloader) [RUU]WP,adsp,0

(bootloader) [RUU]WP,adsp,100

(bootloader) ...... Successful

(bootloader) start image[boot] unzipping & flushing...

(bootloader) [RUU]UZ,boot,0

(bootloader) [RUU]UZ,boot,12

(bootloader) [RUU]UZ,boot,22

(bootloader) [RUU]UZ,boot,33

(bootloader) [RUU]UZ,boot,44

(bootloader) [RUU]UZ,boot,56

(bootloader) [RUU]UZ,boot,68

(bootloader) [RUU]UZ,boot,80

(bootloader) [RUU]UZ,boot,91

(bootloader) [RUU]UZ,boot,100

(bootloader) [RUU]WP,boot,0

(bootloader) [RUU]WP,boot,99

(bootloader) [RUU]WP,boot,100

(bootloader) ...... Successful

(bootloader) start image[recovery] unzipping & flushing...

(bootloader) [RUU]UZ,recovery,0

(bootloader) [RUU]UZ,recovery,6

(bootloader) [RUU]UZ,recovery,12

(bootloader) [RUU]UZ,recovery,20

(bootloader) [RUU]UZ,recovery,27

(bootloader) [RUU]UZ,recovery,37

(bootloader) [RUU]UZ,recovery,43

(bootloader) [RUU]UZ,recovery,62

(bootloader) [RUU]UZ,recovery,68

(bootloader) [RUU]UZ,recovery,76

(bootloader) [RUU]UZ,recovery,85

(bootloader) [RUU]UZ,recovery,92

(bootloader) [RUU]UZ,recovery,99

(bootloader) [RUU]UZ,recovery,100

(bootloader) [RUU]WP,recovery,0

(bootloader) [RUU]WP,recovery,99

(bootloader) [RUU]WP,recovery,100

(bootloader) ...... Successful

(bootloader) start image[sbl1-1] unzipping & flushing...

(bootloader) [RUU]UZ,sbl1-1,0

(bootloader) [RUU]UZ,sbl1-1,100

(bootloader) signature checking...

(bootloader) verified fail

(bootloader) ..... Bypassed

(bootloader) start image[sbl1-2] unzipping & flushing...

(bootloader) [RUU]UZ,sbl1-2,0

(bootloader) [RUU]UZ,sbl1-2,100

(bootloader) signature checking...

(bootloader) verified fail

(bootloader) ..... Bypassed

(bootloader) start image[sbl1-3] unzipping & flushing...

(bootloader) [RUU]UZ,sbl1-3,0

(bootloader) [RUU]UZ,sbl1-3,100

(bootloader) signature checking...

(bootloader) [RUU]WP,sbl1-3,0

(bootloader) [RUU]WP,sbl1-3,100

(bootloader) ...... Successful

(bootloader) start image[sbl1-4] unzipping & flushing...

(bootloader) [RUU]UZ,sbl1-4,0

(bootloader) [RUU]UZ,sbl1-4,100

(bootloader) signature checking...

(bootloader) verified fail

(bootloader) ..... Bypassed

(bootloader) start image[sbl1-5] unzipping & flushing...

(bootloader) [RUU]UZ,sbl1-5,0

(bootloader) [RUU]UZ,sbl1-5,100

(bootloader) signature checking...

(bootloader) verified fail

(bootloader) ..... Bypassed

(bootloader) start image[sbl2] unzipping & flushing...

(bootloader) [RUU]UZ,sbl2,0

(bootloader) [RUU]UZ,sbl2,100

(bootloader) [RUU]WP,sbl2,0

(bootloader) [RUU]WP,sbl2,100

(bootloader) ...... Successful

(bootloader) start image[sbl3] unzipping & flushing...

(bootloader) [RUU]UZ,sbl3,0

(bootloader) [RUU]UZ,sbl3,100

(bootloader) [RUU]WP,sbl3,0

(bootloader) [RUU]WP,sbl3,100

(bootloader) ...... Successful

(bootloader) start image[radio] unzipping & flushing...

(bootloader) [RUU]UZ,radio,0

(bootloader) [RUU]UZ,radio,6

(bootloader) [RUU]UZ,radio,11

(bootloader) [RUU]UZ,radio,17

(bootloader) [RUU]UZ,radio,23

(bootloader) [RUU]UZ,radio,28

(bootloader) [RUU]UZ,radio,34

(bootloader) [RUU]UZ,radio,40

(bootloader) [RUU]UZ,radio,46

(bootloader) [RUU]UZ,radio,52

(bootloader) [RUU]UZ,radio,59

(bootloader) [RUU]UZ,radio,69

(bootloader) [RUU]UZ,radio,75

(bootloader) [RUU]UZ,radio,80

(bootloader) [RUU]UZ,radio,87

(bootloader) [RUU]UZ,radio,92

(bootloader) [RUU]UZ,radio,99

(bootloader) [RUU]UZ,radio,100

(bootloader) [RUU]WP,radio,0

(bootloader) [RUU]WP,radio,23

(bootloader) [RUU]WP,radio,46

(bootloader) [RUU]WP,radio,69

(bootloader) [RUU]WP,radio,92

(bootloader) [RUU]WP,radio,100

(bootloader) ...... Successful

(bootloader) start image[rcdata] unzipping & flushing...

(bootloader) [RUU]UZ,rcdata,0

(bootloader) [RUU]WP,rcdata,0

(bootloader) ...... Successful

OKAY

Flash Zip Complete

Execution time is 24(s)

C:\Android>fastboot reboot-bootloader

rebooting into bootloader... OKAY

Execution time is 38(ms)

C:\Android>fastboot oem rebootRUU

... (bootloader) Start Verify: 0

OKAY

Execution time is 44(ms)

C:\Android>fastboot flash zip RUU.zip

sending 'zip'... (50280 KB)

And that's the end :P It's stuck on sending zip again, I will wait for another hour maybe.