POCO F4 vs Xiaomi Redmi K40S

A spec-by-spec comparison of the POCO F4 and the Xiaomi Redmi K40S, taken from their full specification sheets. Green marks the better value in each measured row.

POCO F4 smartphone

POCO F4

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Full specs, price & review →
VS
Xiaomi Redmi K40S smartphone

Xiaomi Redmi K40S

From $129
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Head to head

POCO F4Xiaomi Redmi K40S
Our rating8/108/10
Battery4,500 mAh4,500 mAh
Wired charging67W67W
RAM (max)12 GB12 GB
Storage (max)256 GB256 GB
Screen size6.67 in6.67 in
Refresh rate120 Hz120 Hz
Main camera64 MP48 MP
Weight (lower is lighter)195 g195 g
ReleasedJun 2022Mar 2022
Summary: POCO F4 is ahead on main camera.
★ Which should you buy? POCO F4 is the stronger overall pick on the measured specs.

Reviewed by the infozme.com Editorial Team — see how we research & rate phones.

Display

POCO F4Xiaomi Redmi K40S
TypeAMOLED, 120Hz, HDR10+, Dolby Vision, 1300 nits (peak)AMOLED, 120Hz, HDR10+, 1300 nits (peak)
Size6.67 inches6.67 inches
Resolution1080 x 2400 pixels, 20:9 ratio (~395 ppi density)1080 x 2400 pixels, 20:9 ratio (~395 ppi density)
ProtectionCorning Gorilla Glass 5Corning Gorilla Glass Victus (front), Corning Gorilla Glass 5 (back)

Platform

POCO F4Xiaomi Redmi K40S
OSAndroid 12, MIUI 13 for POCO (upgradable to Android 13, MIUI 14)Android 12, MIUI 13 (upgradable to HyperOS based on Android 14)
ChipsetQualcomm Snapdragon 870 5G (7 nm)Qualcomm SM8250-AC Snapdragon 870 5G (7 nm)
CPUOcta-core (1x3.2 GHz Kryo 585 & 3x2.42 GHz Kryo 585 & 4x1.80 GHz Kryo 585)Octa-core (1x3.2 GHz Kryo 585 & 3x2.42 GHz Kryo 585 & 4x1.80 GHz Kryo 585)
GPUAdreno 650Adreno 650

Memory

POCO F4Xiaomi Redmi K40S
Card slotNoNo
Internal128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM, 256GB 12GB RAM (LPDDR5, UFS 3.1)128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM, 256GB 12GB RAM (UFS 3.1)

Main Camera

POCO F4Xiaomi Redmi K40S
Triple64 MP, f/1.8, (wide), 1/2.0", 0.7µm, PDAF, OIS; 8 MP, f/2.2, 119˚ (ultrawide); 2 MP, f/2.4, (macro)48 MP, f/1.8, (wide), 1/2", 0.8µm, PDAF, OIS; 8 MP, f/2.2, 119˚ (ultrawide); 2 MP, f/2.4, (macro)
FeaturesLED flash, HDR, panoramaLED flash, HDR, panorama
Video4K@30/60fps, 1080p@30/60/120/240/960fps4K@30fps, 1080p@30/60/120fps, 720p@960fps; gyro-EIS

Selfie Camera

POCO F4Xiaomi Redmi K40S
Single20 MP, f/2.5, (wide), 1/3.06", 1.0µm20 MP, f/2.4, (wide)
FeaturesHDR—
Video1080p@30fps1080p@30fps

Battery

POCO F4Xiaomi Redmi K40S
TypeLi-Po 4500 mAh, non-removableLi-Po 4500 mAh, non-removable
Charging67W wired, PD3.0, QC3, 100% in 38 min (advertised)67W wired, PD3.0, QC3+, 100% in 38 min (advertised)

Body

POCO F4Xiaomi Redmi K40S
Dimensions163.2 x 76 x 7.7 mm163.2 x 75.95 x 7.7 mm
Weight195 g195 g
BuildGlass front (Gorilla Glass 5), glass back, plastic frameGlass front (Corning Gorilla Glass Victus), glass back (Corning Gorilla Glass 5)
SIMDual SIM (Nano-SIM, dual stand-by)Dual SIM (Nano-SIM, dual stand-by)

Comms

POCO F4Xiaomi Redmi K40S
WLANWi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi DirectWi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct
Bluetooth5.2, A2DP, LE5.2, A2DP, LE
PositioningGPS (L1+L5), GLONASS (G1), BDS (B1I+B1c+B2a), GALILEO (E1+E5a), QZSS (L1+L5), NavICGPS (L1+L5), GLONASS (G1), BDS (B1I+B2a), GALILEO (E1+E5a), QZSS (L1+L5), NavIC
NFCYes (market/region dependent)Yes (market/region dependent)
Infrared portYesYes
USBUSB Type-C 2.0, OTGUSB Type-C 2.0, OTG

Launch

POCO F4Xiaomi Redmi K40S
AnnouncedJune 20222022, March 17
StatusAvailableAvailable. Released 2022, March 17
ReleasedJune 2022—

Frequently asked questions

Which is newer, POCO F4 or Xiaomi Redmi K40S?

POCO F4 — Jun 2022 for the POCO F4 versus Mar 2022 for the Xiaomi Redmi K40S.

Is the POCO F4 or the Xiaomi Redmi K40S rated higher?

We rate the POCO F4 8/10 and the Xiaomi Redmi K40S 8/10.

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