[Oukitel (All phone models)] vxsw:
just check it and all works fine (win10)

ok. let's try step by step.

- install this driver https://mtkdriver.com/mtk-driver-v5-2307#driver

- connect your phone (in common os mode) to motherboard usb port

- open win command line

- type:

adb reboot bootloader

- phone would go to fastboot mode (little white text atbottom left) and you'll se in win devices:

- type in command line:

fastboot reboot fastboot

your phone must reload to fastboot (blue/brown menu) and you'll see in win devices:

- type in command line:

fastboot getvar all

- you'll get some text.

all command line listing must be something like this:

D:\>adb reboot bootloader

D:\>fastboot reboot fastboot
Rebooting into fastboot OKAY [ 0.006s]
< waiting for any device >
Finished. Total time: 25.334s

D:\>fastboot getvar all
(bootloader) cpu-abi:arm64-v8a
(bootloader) snapshot-update-status:none
(bootloader) super-partition-name:super
(bootloader) is-logical:preloader_raw_b:no
(bootloader) is-logical:preloader_raw_a:no
(bootloader) is-logical:vendor_boot_a:no
(bootloader) is-logical:misc:no
(bootloader) is-logical:boot_b:no
(bootloader) is-logical:userdata:no
(bootloader) is-logical:sdc:no
(bootloader) is-logical:vendor_boot_b:no
(bootloader) is-logical:para:no
(bootloader) is-logical:super:no
(bootloader) is-logical:boot_a:no
(bootloader) is-logical:metadata:no
(bootloader) is-logical:product_a:yes
(bootloader) is-logical:product_b:yes
(bootloader) is-logical:vendor_a:yes
(bootloader) is-logical:vendor_b:yes
(bootloader) is-logical:system_a:yes
(bootloader) is-logical:system_b:yes
(bootloader) battery-soc-ok:yes
(bootloader) battery-voltage:0
(bootloader) off-mode-charge:0
(bootloader) treble-enabled:true
(bootloader) is-userspace:yes
(bootloader) partition-size:preloader_raw_b:0x3FF000
(bootloader) partition-size:preloader_raw_a:0x3FF000
(bootloader) partition-size:vendor_boot_a:0x4000000
(bootloader) partition-size:misc:0x80000
(bootloader) partition-size:boot_b:0x2800000
(bootloader) partition-size:userdata:0x1C667F8000
(bootloader) partition-size:sdc:0x1DCB000000
(bootloader) partition-size:vendor_boot_b:0x4000000
(bootloader) partition-size:para:0x80000
(bootloader) partition-size:super:0x119800000
(bootloader) partition-size:boot_a:0x2800000
(bootloader) partition-size:metadata:0x2000000
(bootloader) partition-size:product_a:0x0
(bootloader) partition-size:product_b:0x0
(bootloader) partition-size:vendor_a:0x263A6000
(bootloader) partition-size:vendor_b:0x0
(bootloader) partition-size:system_a:0x8DB0C000
(bootloader) partition-size:system_b:0x36E6000
(bootloader) version-vndk:30
(bootloader) partition-type:preloader_raw_b:raw
(bootloader) partition-type:preloader_raw_a:raw
(bootloader) partition-type:vendor_boot_a:raw
(bootloader) partition-type:misc:raw
(bootloader) partition-type:boot_b:raw
(bootloader) partition-type:userdata:raw
(bootloader) partition-type:sdc:raw
(bootloader) partition-type:vendor_boot_b:raw
(bootloader) partition-type:para:raw
(bootloader) partition-type:super:raw
(bootloader) partition-type:boot_a:raw
(bootloader) partition-type:metadata:raw
(bootloader) partition-type:product_a:raw
(bootloader) partition-type:product_b:raw
(bootloader) partition-type:vendor_a:raw
(bootloader) partition-type:vendor_b:raw
(bootloader) partition-type:system_a:raw
(bootloader) partition-type:system_b:raw
(bootloader) has-slot:preloader_raw:yes
(bootloader) has-slot:vendor_boot:yes
(bootloader) has-slot:misc:no
(bootloader) has-slot:boot:yes
(bootloader) has-slot:userdata:no
(bootloader) has-slot:sdc:no
(bootloader) has-slot:para:no
(bootloader) has-slot:super:no
(bootloader) has-slot:metadata:no
(bootloader) has-slot:product:yes
(bootloader) has-slot:vendor:yes
(bootloader) has-slot:system:yes
(bootloader) security-patch-level:2021-10-05
(bootloader) vendor-fingerprint:OUKITEL/WP15_EEA/WP15:11/RP1A.200720.011/1634212561:user/release-keys
(bootloader) hw-revision:0
(bootloader) current-slot:a
(bootloader) serialno:OUKITELWP15xxxxx
(bootloader) product:WP15
(bootloader) version-os:11
(bootloader) first-api-level:30
(bootloader) slot-count:2
(bootloader) max-download-size:0x10000000
(bootloader) version:0.4
(bootloader) version-baseband:
(bootloader) secure:yes
(bootloader) variant:NA
(bootloader) dynamic-partition:true
(bootloader) system-fingerprint:OUKITEL/WP15_EEA/WP15:11/RP1A.200720.011/1634212561:user/release-keys
(bootloader) version-bootloader:unknown
(bootloader) unlocked:yes
all:
Finished. Total time: 0.605s

D:\>

did you get this, or get some different on some step?