Need some info about this key
 

Does this key work with credits or all operations are free?
also does it support unlock for all SE phones or only specific modeles?

No man only support DB3xxx phones fully mean unlock(only to cid53) and flash and only flashing PDA phones.
Nothing more.
All this free without credits like all other box.
What is missing what other tools can do now free:
A1 cpu full support(DB2xxx all cid)
S1 ODM phones full support( to AID:0004 this only by server and credits)
PDA S1 cpu unlock(satio, U5 vivaz, U8 vivaz pro, X10i, X10 mini, X10 mini pro, X8, Xperia arc, xperia play, xperia neo etc by server and credits)
A2 cpu cid80-81 unlock(by server and credits)

@Wojtek poczekamy zobaczymy... kupiłem klucz troche zaryzykowałem ale.... ;]

@ read sticky thrade and don't think all upadtes will come in just one releas :)

gdzie są jakieś updaty ???!!!!!!!