[ZTE Axon 7 Mini ROMs, Kernels, Recoveries, & Other] demenicis:
I'm glad to hear, you will be sorted now then...…

please you follow these steps, VERY CAREFULLY, adb can sometimes be TOO powerful.

the easiest option would be to automate these steps...…..you can just follow steps 1 and 2 below, then place the attached .txt file into the adb folder, RENAME (just change the extension) it to ".bat" and run it (double click) and you should be done. this bat file simply does all the steps (except 1 and 2) at once.

STEP 1- download the bootstack from here

https://mega.nz/#!7MMASZYY!ZgKRb-mQVcvZ82MN1fhF_VpUh9Y_BvRFmUg88YMz2xk

I don't remember which bootstack this is I think it is for the US 7.1.1, but it doesn't matter, these will make your twrp work.

STEP 2- place the downloaded file inside the adb folder and EXTRACT it just there, in the root of you adb folder, where the adb.exe is.

STEP 3- go to adb folder, and open CMD or power shell there.

STEP 4- write these lines, one by one and hit enter after each command. this will simply copy these files to your phone internal memory

adb push rpm.mbn /data/media/rpm.mbn
adb push tz.mbn /data/media/tz.mbn
adb push sbl1.mbn /data/media/sbl1.mbn
adb push emmc_appsboot.mbn /data/media/emmc_appsboot.mbn
adb push ddr.mbn /data/media/ddr.mbn
adb push adspso.bin /data/media/adspso.bin
adb push splash.img /data/media/splash.img
adb push NON-HLOS.bin /data/media/NON-HLOS.bin
adb push hyp.mbn /data/media/hyp.mbn
adb push keymaster.mbn /data/media/keymaster.mbn
adb push cmnlib.mbn /data/media/cmnlib.mbn
adb push boot-eu-7.1.1-b09-noverity.img/data/media/boot.img

STEP 5- Now make sure you do not make errors when typing.

you are about to flash each of these files into their respective partition.

adb shell dd if=/data/media/rpm.mbn of=/dev/block/bootdevice/by-name/rpm
adb shell dd if=/data/media/tz.mbn of=/dev/block/bootdevice/by-name/tz
adb shell dd if=/data/media/sbl1.mbn of=/dev/block/bootdevice/by-name/sbl1
adb shell dd if=/data/media/emmc_appsboot.mbn of=/dev/block/bootdevice/by-name/aboot
adb shell dd if=/data/media/ddr.mbn of=/dev/block/bootdevice/by-name/ddr
adb shell dd if=/data/media/adspso.bin of=/dev/block/bootdevice/by-name/dsp
adb shell dd if=/data/media/splash.img of=/dev/block/bootdevice/by-name/splash
adb shell dd if=/data/media/NON-HLOS.bin of=/dev/block/bootdevice/by-name/modem
adb shell dd if=/data/media/hyp.mbn of=/dev/block/bootdevice/by-name/hyp
adb shell dd if=/data/media/keymaster.mbn of=/dev/block/bootdevice/by-name/keymaster
adb shell dd if=/data/media/cmnlib.mbn of=/dev/block/bootdevice/by-name/cmnlib
adb shell dd if=/data/media/boot.img of=/dev/block/bootdevice/by-name/boot

STEP 6- final step. Hold your breath and type

adb reboot recovery.

hopefully twrp will boot.

Note:

After flashing a new ROM, which must be a 7.1.1, your system may only boot if you flash the boot-eu-7.1.1-b09-noverity.img again. this is because the boot in the new ROM will override this one.

once the ROM is installed, you can just type the last command in CMD again or use tulip tool via edl, you choose.

remember that the files are already in your phone so you just need to write it into the boot partition.

I hope it helps and good luck