Clock [Q] htc one m7 hboot 1.44 missing command from fastboot oem eg., writeserialno

I'm very confused why I'm missing so many commands from my hboot.

Do I just need to upgrade to a different hboot? I heard 1.44 was super safe though.

I need the writeserialno command (even though getvar works) so that I can restore this phone to the serialno on the sim tray because it's all zeros now for some reason!

Is there an hboot I can just grab and install the zip straight up with TWRP that has these in it?

Thanks in advance!
sprint mogul ppc-6800 - sero plan - nexvision's hybrid rom
-> touch pro II -> iPhone 3gs -> Htc Hero -> iPhone 4 + unlimited Data sim from ipad + Skype + Google voice = unlimited everything for $34.