Samsung Galaxy Note 4 has a huge 5.7″ 1440 x 2560 QHD Super AMOLED display, 2.7Ghz quad-core processor, 3GB of RAM and 32GB internal storage. The Galaxy Note 4 shooter comes in at 16MP with optical image stabilisation and 4K video recording. The exterior features a faux leather texture backing and metal casing.
Galaxy Note 4 has received the Android 5.0.2 update. Android 5.1 was rolled out thereafter and it looks like it might take a while before Note 4 receives it. However Android being open source, there is always the option of installing custom ROM. CM 12.1 ROM running on Android 5.1 is available for the Note 4. Follow the guide below to install it on the Note 4.