Originally Posted by gigamage
OK I see. If I were you I would use an RUU to update to a later version of software that has HBOOT 2.15.
Actually this is what I would do:
1: Run the correct RUU for your phone from one that moonshine.io supports:
2: IF you want, then run moonshine.io to get S-OFF.
3: Flash a custom recovery like TWRP
4: Install ROM.
If you don't get S-OFF, then you need to flash boot.img.
If anyone disagrees with this, please chime in please.