In October 2017, Lei Jun announced that the sales of Redmi Note 4X exceeded 20 million units globally and its reputation was good.

The Global 4 or 4X variant (SD - codename mido) uses Qualcomm's Octa-core 2.0 GHz Snapdragon 625 CPU and Adreno 506 GPU.

All variants included an 5.5 in (140 mm) 1080p display, 2, 3 or 4 GB of RAM, 16, 32 or 64 GB eMMC 5.1 Flash storage, a 5MP front camera, non-removable 4100 mAh Li-Po battery (BN41/BN43) and it supports Wi-Fi 802.11a/b/g/n/ac* (* = Wi-Fi 802.11 ac band is supported on MTK variant only) networks on both the 2.4 and 5 GHz bands.

Another notable feature of the phone is the presence of a fingerprint sensor at the back which can also be used for capturing images via the front or the rear cameras.

The Redmi Note 4 (MTK) has screws on each side of the micro-USB port which allows easy access to internal components.

GSMArena states: "The Redmi Note 4(X)'s Snapdragon 625, which we consider to be the ultimate mid-range chipset for this generation, provides excellent performance with great power efficiency and thermal properties.

Also, in GSMArena's device review, the Snapdragon edition of the phone scored much better than the specified figures, getting a 1500:1 Contrast ratio, 484nits of maximum luminance and excellent colour accuracy for the class.

[1] [16] According to AndroidAuthority: "The Redmi Note 4(X) is not perfect, but it is a well-rounded package that one wouldn't hesitate to recommend to anyone looking for a budget or mid-range smartphone.

[18] AndroidCentral also considered Redmi Note 4 (SD variant) to be one of the best smartphones one can buy in the mid-budget range even after 6 months of launch.