[Android Q&A, Help & Troubleshooting] ksstms:
Hi guys!

My sister's Oukitel U7 Pro (MTK6580) has stopped working a few days ago. The stock rom has frozen, so I took the battery out, put it back in, and now it won't start again. It just displays the manufacturer logo, and nothing happens. Recovery mode doesn't work either, but fastboot does. I've found TWRP for it and tried to install.

First try: fastboot

This thing has a pretty strange serial number:

C:\adb>fastboot devices
0123456789ABCDEF fastboot

Oem unlock is messed up. The warning text on the screen says volume up is accept, and volume down is deny. It works the other way around. At least that's what appears in the terminal. If I guess right, the phone doesn't get unlocked:

C:\adb>fastboot getvar all
(bootloader) max-download-size: 0x8000000
(bootloader) partition-size:userdata: 32000000
(bootloader) partition-type:userdata: ext4
(bootloader) partition-size:cache: 10000000
(bootloader) partition-type:cache: ext4
(bootloader) partition-size:system: 60000000
(bootloader) partition-type:system: ext4
(bootloader) partition-size:metadata: 2760000
(bootloader) partition-type:metadata: raw data
(bootloader) partition-size:nvdata: 2000000
(bootloader) partition-type:nvdata: ext4
(bootloader) partition-size:frp: 100000
(bootloader) partition-type:frp: raw data
(bootloader) partition-size:expdb: a00000
(bootloader) partition-type:expdb: raw data
(bootloader) partition-size:logo: 800000
(bootloader) partition-type:logo: raw data
(bootloader) partition-size:para: 80000
(bootloader) partition-type:para: raw data
(bootloader) partition-size:keystore: 800000
(bootloader) partition-type:keystore: raw data
(bootloader) partition-size:secro: 600000
(bootloader) partition-type:secro: raw data
(bootloader) partition-size:oemkeystore: 200000
(bootloader) partition-type:oemkeystore: raw data
(bootloader) partition-size:recovery: 1000000
(bootloader) partition-type:recovery: raw data
(bootloader) partition-size:boot: 1000000
(bootloader) partition-type:boot: raw data
(bootloader) partition-size:lk: 60000
(bootloader) partition-type:lk: raw data
(bootloader) partition-size:seccfg: 40000
(bootloader) partition-type:seccfg: raw data
(bootloader) partition-size:protect2: a00000
(bootloader) partition-type:protect2: ext4
(bootloader) partition-size:protect1: a00000
(bootloader) partition-type:protect1: ext4
(bootloader) partition-size:nvram: 500000
(bootloader) partition-type:nvram: raw data
(bootloader) partition-size:proinfo: 300000
(bootloader) partition-type:proinfo: raw data
(bootloader) partition-size:preloader: 40000
(bootloader) partition-type:preloader: raw data
(bootloader) off-mode-charge: 1
(bootloader) warranty: yes
[U][B](bootloader) unlocked: no[/B][/U]
(bootloader) secure: yes
(bootloader) kernel: lk
(bootloader) product: W825_648_AW_LOQ_OUKITEL
(bootloader) version: 0.5
all: Done!!
finished. total time: 0.417s

And flashing fails of course:

C:\adb>fastboot flash recovery recovery.img
target reported max download size of 134217728 bytes
sending 'recovery' (11858 KB)...
OKAY [ 0.471s]
writing 'recovery'...
FAILED (remote: download for partition 'recovery' is not allowed
)
finished. total time: 0.497s

Second try: FlashTool

There's a youtube video (?v=k5FC4jXsa_g) about this. "DA download" works, and after that "Download Flash" gets stuck at 0%.

I've found a flashable official rom on needrom.com, with all the partitions and scatter file. They provided a program called "SPMultiPortFlashDownloadProject", but that doesn't work either. I tried flashing that one with SPFlashTool too, but no luck.

I appreciate any piece of information/idea you have. Sorry for the long post.

Best regards