[NO OS] OS has been deleted and ADB Sideload Not Working (Z00A)

I ordered a phone and received it today and found that the OS is gone and I wasn't able to install a new one through adb sideload. The only menus I can access are the Boot Menu and the Recovery menu built into the phone.

My device is not being recognized through 'adb' at all and only fastboot commands are available.

Any help? I can explain more if you'd like, I'm still counting the problems I have with this phone currently.