Samsung Galaxy Grand 2 with 5.2 inch display, 1.2 GHz Cortex-A7 Quad-core Qualcomm MSM8226 Snapdragon 400 and 1.5GB of RAM is a pretty good smartphone and compatible for Android 5.0 Lollipop update but due to some reason, Samsung is not releasing the same update for this device. Possibly they are too busy porting the update for flagship devices and working on new upcoming phones.
So, I decided to test out some custom ROM as the kitkat started freezing too much on my Grand 2. Luckily came across GenNxt N4 Project. It is a Custom ROM for Grand 2 G7102 that brings many features of Note 4 to you Grand 2 along with all new lollipop style UI. It is very light weight and bloatware free offering you amazing performance.
Now, as you seem to be interested getting this ROM on your phone as well, you will need to download few files such as the ROM Package, ClockworkMod, SuperSU, etc as you must root your phone before installing the ROM. You can download all these files from below. For step by step guide of Rooting and installing ROM, you can check this Guide. You can check the ROM performance Review in this video: