ZTE A520 MT6735m-MT6737m help needed

[atv]

hi, good night,

with cm2mtk v1.58 you can create a backup in (full).bin and (firmware)scatter.

but with cm2mt2 you can only backup in scatter, i want to backup a zte A520 mt6735m-mt6737m,

but when i flash any phone with versions 2.04 2.05 and 2.06 with the backup created, it ends as a bricked device (phones in working previous condition), i tried with 5 phones, tried with:
3 different phone software versions and with 4 different phones
- tried checked and unchecked: update PMT, regions Pre-erase, extended mode, check HW compatibility.
- tried loading an nvram backup,
- tried erasing in spflashtool before flashing, and the same result.
- tried without the preloader, and the same outcome.

but if i want to flash with sp flashtool the cm2mt2's scatter.backup

USB DL IMAGE SIGN HEADER NOT FOUND (6045),
and there is only 1 sp flashtool backup rom, over the internet and its a dual sim russian version, and i need to keep the carrier's firmware.

if i check the cm2mt2 scatter.backup it comes with the files in .bin, as usual, but if i check the russian rom it comes as:
boot-sign.bin
boot-verified.bin
cache-sign.bin
lk-sign.bin
lk-verified.bin
logo-sign.bin
etc...
i don't have and use other mtk tool, to try to flash the phones, so

1.How can i create that kind of backup, signed verified, with cm2mt2, to flash with sp flashtool?

2.if i flash them in sp flashtool format+download, using only vol- (in cm2mt2 both vol-and vol+ to connect), with the signed version, all ok but no imei and dual sim russian version.

and if i try to use the infinity scatter backup, disabling driver enforcing, always fail, i believe because it is not a signed verified flash,

tried already copying the checksum.exe and running it but even after the checksum ok, sp flashtool always fails.

thank you very much indeed for your guide and help

[atv]

can you erase one of the double post please, pc freezed and now double post