Redmi Note 9 Teardown

July 2, 2023

Yesterday, Xiaomi launched three phones: Redmi Note 9 4G, Redmi Note 9 5G, and Redmi Note 9 Pro 5G. Today, Aio Technology shared teardown videos of these three phones.

According to the video, the back covers of the Redmi Note 9 4G and Redmi Note 9 5G are made of plastic. The difference is that the back cover of the Redmi Note 9 5G is treated to make it look like AG glass, while the Redmi Note 9 Pro 5G uses a real AG glass back cover.

The Redmi Note 9 4G has a cooling film on the back cover, while the cooling films of the 5G and Pro 5G versions are placed on the body. The back covers of both the 4G and 5G versions have fingerprint flex cables connecting to the motherboard. In addition, their back covers also integrate antennas. The difference is that the back cover of the 5G version has more antennas.

The flash of the Redmi Note 9 4G is integrated into the motherboard cover and connected to the motherboard via metal contact points. The flash of the 5G version is integrated into the camera module cage, while the flash of the Pro 5G is soldered onto the motherboard.

The 3.5mm headphone jack of the Note 9 4G is soldered onto the motherboard, while the other two are integrated into the bottom board. The processor on the motherboard is covered with a metal copper foil and coated with thermal paste. After peeling off the copper foil, the processor and ROM chip are visible.

They are powered by Snapdragon 662, Dimensity 800U, and Snapdragon 750G processors, and their memory and storage use UFS 2.2 and LPDDR4.

Their battery capacities are 6000 mAh, 5000 mAh, and 4820 mAh, respectively. All three phones use the same model of speaker, but the cable designs are different.

Their bottom board integrates a Type-C port, charging protection circuit, antenna, and speaker contacts. The 5G and Pro 5G versions also integrate a 3.5mm headphone jack.

All three phones use LCD screens, and the 4G version’s screen also integrates the cables for the mainboard and sub-board. Their screen models are PM6530MB2-3, PM6675JB3-1, and PM6530JB3-4, all from China Star Optoelectronics Technology Co., Ltd.