DB2020 CID52 unlocking, as far as I knoow is only possible bt Unlock Patch, not permanent.
You are wrong. Davinciteam supports full unlock.
Look here:

Davinciteam

-» Unlock Motorola Phones 10 EUR**
-» Flashing / Old-Models 10 EUR**
-» Flashing / DB2020 10 EUR**
-» Unlock / DB2020 50 EUR**
-» Patch Unlock / DB2020 10 EUR**
-» Patch Unlock / DB2012 10 EUR**
-» Unlock / Old-Models 30 EUR**
-» Unlock A2 / DB3150 50 EUR**
-» PDA / Unlock 40 EUR**
-» Flashing / PDA 20 EUR**

Nice day