i don't know how can unlock z serie (z400v.z360.z140v...) .
i used all version off ust-pro II .soft work well with v3.12 opperation successful but phone still locked .
with version v4.50b error 5 .
(Reading data from box...
Searching for UMTS phone...
UMTS phone detected!
Initializing device...
Initialize OK!
Please wait...
ERROR_5
Elapsed Time (00:01)
with version 5.05b sofware disappear.
please what's wrong ?????????,????????