I tested unlock for C300 and U600 new version that no any other free soft can unlock (only payed box ) and it,s unlocked without problem with only one step is to do
stack reset and the phone will be unlocked (any version)
realy me I d,ont belive that only when I have tested and see result (phone unlocked without downgrade or other thing )
and I think any phone that is in soft list and d,ont wana to unlock directly ,do this magic option and it will be unlocked