Default [Q] ZTE Z993 Prelude UNLOCK?

Does anyone have any ideas as to unlocking the ZTE Z993? I know they have unlocked bootloaders, Fastboot, There's even Root and Custom Recovery out there for this device... But I'm trying to determine a way to network unlock them... Perhaps through an engineering bootloader, flashable through fastboot?
|sent using xda premium|

_S.G.S.IV_[SPH-L720]
_[CWM] [PhilZ Touch]
_TriForceROM 5.2

_S.G.T.3 [SM-T217S]
_Goodness T3 [4.2.2]
_CWM Recovery

[RETIRED]
_S.G.S.III_[SPH-L710]
_[CWM] v6.0.3.7 [PhilZ Touch 5]
_Android.v4.3.1_[AoCP].v6.4
_[TheCollective]