specs

Technology	GSM / HSPA / LTE
Launch Announced	2016, April
Status	Available. Released 2016, May
Body Dimensions	147.1 x 73.8 x 8.3 mm (5.79 x 2.91 x 0.33 in)
Weight	156 g (5.50 oz)
SIM	Hybrid Dual SIM (Nano-SIM, dual stand-by)
Display Type	IPS LCD capacitive touchscreen, 16M colors
Size	5.2 inches, 74.5 cm2 (~68.7% screen-to-body ratio)
Resolution	1080 x 1920 pixels, 16:9 ratio (~424 ppi density)
Platform OS	Android 6.0 (Marshmallow), upgradable to 7.0 (Nougat); EMUI 4.1
Chipset	HiSilicon Kirin 650 (16 nm)
CPU	Octa-core (4x2.0 GHz Cortex-A53 & 4x1.7 GHz Cortex-A53)
GPU	Mali-T830MP2
Memory	Card slot microSDXC (uses shared SIM slot)
Internal	16GB 2GB RAM
Main Camera	Single 13 MP, f/2.0, AF
Features	LED flash, panorama, HDR
Video	1080p@30fps
Selfie camera	Single 8 MP, f/2.0
Sound	Loudspeaker Yes
3.5mm jack	Yes
Comms	WLAN Wi-Fi 802.11 b/g/n, hotspot
Bluetooth	4.1, A2DP, LE
GPS	Yes, with A-GPS, GLONASS/ BDS (region dependent)
Radio	FM radio
USB	microUSB 2.0
Features	Sensors Accelerometer, proximity, compass
Battery	Non-removable 3000 mAh battery
Misc	Colors Silver, Gray, Gold
Models	NEM-UL10, NEM-TL00H, NEM-L21, NMO-L31, NMO-L22, NMO-L23, NMO-L01, NEM-L22, NEM-L51, NEM-AL10
SAR	1.26 W/kg (head) 0.43 W/kg (body)
SAR EU	1.56 W/kg (head) 1.24 W/kg (body)
Price	About 170 EUR
Tests	Performance Basemark OS II 2.0: 1221
Basemark X: 7735
Display	Contrast ratio: 733 (nominal), 2.506 (sunlight)
Camera	Photo / Video
Loudspeaker	Voice 66dB / Noise 71dB / Ring 74dB
Audio quality	Noise -90.4dB / Crosstalk -87.9dB
Battery life	Endurance rating 75h

[167374.310193] usb 3-2: new high-speed USB device number 8 using ehci-pci
[167374.467237] usb 3-2: New USB device found, idVendor=12d1, idProduct=107e, bcdDevice= 2.99
[167374.467244] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[167374.467247] usb 3-2: Product: NEM-L21
[167374.467250] usb 3-2: Manufacturer: HUAWEI
[167374.467253] usb 3-2: SerialNumber: 8SC4C17419000317
[167374.472036] usb-storage 3-2:1.1: USB Mass Storage device detected
[167374.476015] scsi host4: usb-storage 3-2:1.1
[167375.503071] scsi 4:0:0:0: CD-ROM            Linux    File-CD Gadget   0401 PQ: 0 ANSI: 2
[167375.504618] sr 4:0:0:0: Power-on or device reset occurred
[167375.511385] sr 4:0:0:0: [sr0] scsi-1 drive
[167375.513109] sr 4:0:0:0: Attached scsi CD-ROM sr0
[167375.513522] sr 4:0:0:0: Attached scsi generic sg1 type 5

but doesn't show in adb devices

Dial *#*#1357946#*#*

unlock bootloader

huawei doesn't provide official way to do so any more.

https://www.android-hilfe.de/forum/huawei-allgemein.467/huawei-unlock-bootloader-code-generator.756226.html

https://www.droidthunder.com/unlock-bootloader-of-huawei/