L720t baseband unknown 5.0.1 how to root

I have one l720t which was converted to i9500 or i9505 on this it has no service issue but imei and baseband ok
I flash it with l720t kitkat firmware after that baseband was unknown so I flash it with 5.0.1 firmware PDAL720TVPUCOH1
After that baseband always unknown and on this version i was trying to root and all root file was failed no downgrade possible odin fails

1st thing how too root and second thing how to solved this baseband issue

If anyone guide me how to root so i will find the way to fix this baseband issue
Try twrp also odin fails
Cf auto root odin fails

Shahzaib Jahangir