Samsung Galaxy Note 2 was launched in 2012 after the success of Galaxy Note. It has a huge 5.5″ Super AMOLED screen with a resolution of 720×1280 pixels. It has a Quadcore 1.60GHz Exynos 4412 processor, 2GB of RAM. When it was released, it ran on Android 4.1.1 Jelly Bean OS.
Galaxy Note 2 is a very old device. Even CyanogenMod team have not created official CM 12.1 ROM for its international version. However it is available for Verizon Galaxy Note 2. This will update the device to Android 5.1.1. Follow the guide below.