Also, you should downgrade device's firmware for resetting Huawei ID.
You can re-flash your device with this firmware version
Quote:
|
Jenny-L21A 10.0.1.167(C185E3R3P1)
|
Which you can find on support area
Path: /Huawei/Huawei Update firmwares (Offilne)/J-series/JNY-L21/