T-Mobile is the latest mobile carrier in the United States to have been reported to release the Android 6.0 Marshmallow update to LG G4 units, following releases of Sprint and US Cellular. More details here.
Samsung Galaxy Note 4 is heading to Android 6.0.1 Marshmallow soon. Samsung has already begun rolling out the Android 6. 0 Marshmallow update to some units of Galaxy Note outside the United States, while mobile carriers like Verizon has just released the Android 5.
Samsung Galaxy J2 is reportedly heading over to Android 6.0.1 Marshmallow as soon as the software is officially developed by Samsung. The upgrade might come in the second quarter of 2016.