If you wanted to see inside the Xiaomi Mi Note 3 for some reason, now you can. The phone's first teardown is online so that we can see under its 5.5-inch 1080p screen and into its innards. There are no surprises there - we see a dual 12MP camera, 16MP front snapper, a 3,500mAh battery, the 6GB of RAM and the Snapdragon 660 chipset. Xiaomi Mi Note 3 disassembled And if you're planning to tear down your own Mi Note 3 then the source has the instructions on how to do it. You need to remove the SIM tray first and start heating the phone with a heatgun and then pry it open....
Source: http://www.gsmarena.com/xiaomi_mi_note_3s_innards_revealed_in_disassembly-news-27329.php