Originally Posted by thankyouxda
Just updated to N900T UVUDNF1 bootlader and ROM and not quite happy with a few things. I was on Jelly Bean till now. Is it possible to install a NB4 or MI7 Rom even though I am on the new boot loader and radio? Would it work? I need to switch to a TW ROM because of WiFi calling.
NB4 is not jellybean it's kitkat 4.4.2 TW firmware.
MI7 is jellybean 4.3 TW firmware.
Both the NB4 and the MI7 are Tmobile N900T TW roms and both have
the wifi calling option as long as your phone is a Samsung N900T
Tmobile branded device and you are on the Tmobile network.
If your radio/baseband is NB4 then you cannot downgrade to MI7,
however you can upgrade to NE6 or the latest NF1 firmwares which
are Kitkat 4.4.2 TW firmwares and both have the wifi calling feature.