Launch the program
If there is no DC-Unlocker/Rocker/Vygis or Infinity dongle connected to PC, then log in screen will appear. Use your account details to log in
Don't have user account? How to get Username/Password check here
DC Phoenix software window will appear
Connect phone to PC via testpoint. It must be visible under Ports section in device manager as HUAWEI USB COM 1.0
On DC-Phoenix click file select icon and choose special downgrade board software which will have "Downgrade" word in it's file name.
To download this board software visit DC-phoenix support area which is only accessed directly from software by pressing "Download file" button.
Then can press "Update"
Monitor flashing process, phone will enter fastboot soon after flashing begins, it must appear as example below, otherwise flashing device will fail:
If all done correctly flashing will continue
Wait till software indicates flashing process completion
Now you can disconnect and boot the mobile. After this downgrade, phone can be repaired on HCU (IMEI/SN etc.) and flashed back with stock rom (with new security R1) afterwards to restore to its normal state.