Can a unlocked tmobile iphone x work on boost mobile network I asked one rep he said yes another said no but he looked like he didnt want to?

According to Boost's page, yes.
https://activate.boostmobile.com/bring-your-phone
However, you can double check by providing the IMEI on the link I gave you.

Now the thing is that an unlocked phone isn't guaranteed to fully work. Some things may or may not work. I'm not very familiar with Boost, so I can't tell you that it will 100%....Show more