I also have a ZTE K3805-Z which is also not supported, see the info from DC-Unlocker below...
DC - Unlocker 2 Client 1.00.0664
Detecting card :
selection :
manufacturer - ZTE modems
model - Unknown ZTE modem
Found modem : K3805-Z
Model : Unknown ZTE modem
IMEI : 358894032270492
Firmware : R1.5.3.3.2
Compile date / time : Jan 14 2010 15:04:53
SIM Lock status : unknown(read failed)
DC - Unlocker 2 Client 1.00.0664
Detecting card :
selection :
manufacturer - ZTE modems
model - Unknown ZTE modem
Found modem : K3805-Z
Model : Unknown ZTE modem
IMEI : 358894032270492
Firmware : R1.5.3.3.2
Compile date / time : Jan 14 2010 15:04:53
SIM Lock status : unknown(read failed)
Comment