Can this phone be unlocked, I have managed to debrand it but I'm not sure about unlocking it???
It can be unlocked with a new method called Any CID patching: Patching CID53 (DB2020)&DB2010,2012. The guide is missing for DB201x, but you can find guides over the internet.

Here is den_po's short guide for DB2010/2012:
common:
1) use mkrest to make rest for your fw
2) extract contents of {yourplatform}.zip and {yourphone}/{firmware}.zip to your phone
3) turn your phone on and run games/executor
4) reinsert battery

db201x:
5) start jdflasher, select right script (don't forget to edit cid num value in it), uncheck "rsa" box, connect, enter to bflash
6) flash rest
7) do whatever you want
continue from the step 3 further
bfs doesn't work