Xiaomi Mi Note 3 comes with a 5.5-inch full-HD (1080×1920 pixels) display with a pixel density of 403ppi and a 94.4 percent NTSC color gamut. The phone is powered by a Snapdragon 660 SoC clocked at up to 2.2GHz coupled with 6GB of LPDDR4x RAM. It packed a dual rear camera with a 12-megapixel sensor coupled with a wide-angle lens, f/1.8 aperture, and 4-axis optical image stabilisation, and the second 12-megapixel sensor coupled with a telephoto lens, and an f/2.6 aperture. The camera offers 2x optical zoom, and PDAF. The front camera featured a 16-megapixel sensor with 2.0 µm pixels. The Xiaomi Mi Note 3 comes with 64GB or 128GB of built-in storage, with no expansion via microSD card.
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There is no screw securing the back cover, so we heat up the back cover for about 2 minutes with a heat gun.
Insert a card under the back cover. Slide the card along the edge to remove the back cover.
With the back cover removed, we can see the phone using a common motherboard + battery + sub-board of the three stage design, the motherboard and sub board connection via a soft cable. Compared to the other L type, the three stage design can make the battery capacity larger.
Its motherboard uses a whole plastic cover plate to fix all kinds of connectors. In order to access the motherboard, we need to remove the plastic cover first.
Remove 9 screws and uncover the graphite sticker. You can remove the plastic cover.