I have the 9 pro and I don't see that existing anywhere? I already looked for something like that.Nope, just an MSM Tool that can flash a T-Mobile variant. I don't know if one exists for the 9 but there is one for the 9 Pro that you can use to get to EU software and then use the global 9 downgrade package to get back to proper 9 firmware.
*** Use this at your very own risk. *** You will lose all data *** Backup your working modemst1/2 and persist. If you lose these for any reason, it's unique to your device and not recoverable if you didn't back up (via MSM or other people). ***...forum.xda-developers.com