For those of you who want the latest Android 6.0.1 Marshmallow with root (based on official Samsung firmware not AOSP) on your T-Mobile SM-N910T, Canadian SM-N910W8, or international SM-N910F, you can do it by installing Dr. Ketan’s ROM.
Based on SM-N910G (which is the only model available with official Marshmallow on Note 4 models), Dr. Ketan’s ROM brings you the latest official Android 6.0.1 stock firmware to your Note 4 plus root and much more.
Inside you will find full Android 6.0.1 along with all the new Marshmallow features including DOZE, which should save you battery life while idling.
You will also find full Edge panel screen like on the Galaxy S7 Edge. Now, this isn’t a fully ported ROM, so that’s the only S7 Edge feature you will really find. But this ROM comes with SuperSU (if you flash SuperSU zip during install) and also Viper4Android for tweaking your sound.
Galaxy Note 4 w/ Android 6.0.1 Marshmallow on Antutu Benchmark: 55,769
Performance is pretty good, I got about 55,769 on Antutu benchmark. Apart from benchmarks, performance is fast and zippy and battery life is average although you will get more battery life when idling due to DOZE Marshmallow feature.