Is it possible just to do the last step to unlock a phone that i dont want to flash or unbrand?

B. How to apply the generated patches to DB2020 CID52 phones:

III. We will apply the generated patch to unlock the phone.
With SETool2 Lite v1.11:
1. Click on Clear button.
2. Select your phone model.
3. Tick Use "quick access" patch checkbox
4. Uncheck(remove the tick from) Bypass DB2020 security check box.
5. Click on ... (three dots) button near MISC files box, and select the vkp file generated by SIMLockPatchGen.
6. Click Write SCRIPT button
7. Follow the instructions in left status window...
8. When a dialog pop-up, click "Yes" to remove the patch. Click "No" to add the patch. In this case click on "No" button.

Wait until "ELAPSED x SECONDS" appears in status window. Your phone is unlocked.