Remember the golden rules:

For further instructions, you can review this detailed .

Whenever possible, use usblsafe.bin to prevent the flash erasure procedure. Top Resources for USB Loader Files

[Unplugged Device] │ ▼ [Locate Test Point (Pin)] ──► [Short Pin to Ground (Shielding)] │ ▼ [Insert USB Cable] ──► [Release Short after 2 Seconds] │ ▼ [Device detected as "Huawei Mobile Connect - DownLoad Port"]