Sigma v.2.26.11.01. Flash Huawei via Upgrade Mode

Sigma Software v.2.26.11

.....1. Released flashing via UPGRADE MODE feature for 
.................................Huawei smartphones based on Qcom and Hisilicon:

.............................♦ Press vol+vol- and then connect USB cable to enter the Upgrade mode
....................♦ Possible to use original update.app flash files from open sources, e.g. from here or here
............................Please use this method as a main method to flash Huawei smartphones.

.........................2. Released ENABLE DOWNGRADE feature (in Manufacture mode) for 
................................Huawei smartphones based on Qcom/Hisilicon.

.................................................. ...............You may use it:
..................To downgrade phone’s firmware version - for example, downgrade from higher to lower one.
.................................................. ...............How to do this:
.......................................♦ Enable downgrade in Manufacture mode
...........................♦ Reflash the device in using upgrade mode: vol+vol- and insert USB cable

.....................To change phone’s localization (for example, to switch from Operator1 to Operator2).
.................................................. ...............How to do this:
....................................♦ Change provider settings (in manufacture mode)
.......................................♦ Enable downgrade (in manufacture mode)
...........................♦ Flash the phone with the firmware that fits the selected provider settings 
......................................(Using upgrade mode: vol+vol-and powerON)