Finaly...
Platform: HUAWEI
Selected model: VNS-L21
Put the phone in FastBoot Mode:
1. Remove SD and SIM cards from the phone
2. Power phone OFF
3. Press and hold "Vol-" and insert USB cable
4. Wait until the phone enter in FastBoot Mode
Searching for a phone. Please wait...
Detected phone model: VNS-L21
Phone SN: BUC4C16622000521
Phone IMEI: 321002547895415
Phone IMEI2: 321002547895332
SW version: VNS-L21C185B360
Connecting to server..OK
Authorizing...OK
Resetting FRP lock..
If the device didn't reboot automatically, try to reconnect USB cable or re-boot it manually.
FRP lock is successfully reseted!
Performed by 1.0.8 Software version.
All thanks to
Octoplus FRP Tool