Screen size
Poco C81xWinner: 6.9"+20%
Redmi Note 4X5.5"
Quick verdict
Poco C81x leads the measured specs 10-4.
Measured wins
Poco C81x
10
spec wins
Overall winner
Ties
7
equal specs
Redmi Note 4X
4
spec wins
Screen size
Technology
Poco C81x
GSM / HSPA / LTE
Redmi Note 4X
GSM / CDMA / HSPA / LTE
2G bands
Poco C81x
GSM 850 / 900 / 1800 / 1900
Redmi Note 4X
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2, CDMA 800 & TD-SCDMA
3G bands
Poco C81x
HSDPA 850 / 900 / 2100
Redmi Note 4X
HSDPA 850 / 900 / 1900 / 2100
4G bands
Poco C81x
1, 3, 5, 8, 28, 40, 41
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
equal specsStorage
Main camera
equal specsFront camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
USB
equal specs5G support
equal specsNFC
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
Redmi Note 4X
1, 3, 5, 7, 38, 39, 40, 41 - Snapdragon model, 1, 3, 5, 7, 8, 38, 39, 40, 41 - Mediatek model
Speed
Poco C81x
HSPA, LTE
Redmi Note 4X
HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps
Announced
Poco C81x
2026, April 23
Redmi Note 4X
2017, February. Released 2017, February
Status
Poco C81x
Available. Released 2026, April 23
Redmi Note 4X
Discontinued
Dimensions
Poco C81x
171.8 x 77.8 x 8.3 mm (6.76 x 3.06 x 0.33 in)
Redmi Note 4X
151 x 76 x 8.5 mm (5.94 x 2.99 x 0.33 in)
Weight
Poco C81x
193 g (6.81 oz)
Redmi Note 4X
165 g (5.82 oz)
SIM
Poco C81x
Nano-SIM + Nano-SIM
Redmi Note 4X
Nano-SIM + Micro-SIM
Other
Poco C81x
Dust and splash resistant
Redmi Note 4X
-
Build
Poco C81x
-
Redmi Note 4X
Glass front, aluminum back, aluminum frame
Type
Poco C81x
IPS LCD, 120Hz, 650 nits (HBM)
Redmi Note 4X
IPS LCD
Size
Poco C81x
6.88 inches, 112.4 cm2 (~84.1% screen-to-body ratio)
Redmi Note 4X
5.5 inches, 83.4 cm2 (~72.7% screen-to-body ratio)
Resolution
Poco C81x
720 x 1640 pixels (~260 ppi density)
Redmi Note 4X
1080 x 1920 pixels, 16:9 ratio (~401 ppi density)
OS
Poco C81x
Android 15, up to 2 major Android upgrades
Redmi Note 4X
Android 6.0 (Marshmallow), upgradable to 7.0 (Nougat), MIUI 10
Chipset
Poco C81x
Unisoc T7250 (12 nm)
Redmi Note 4X
Qualcomm MSM8953 Snapdragon 625 (14 nm)
CPU
Poco C81x
Octa-core (2x1.8 GHz Cortex-A75 & 6x1.6 GHz Cortex-A55)
Redmi Note 4X
Octa-core 2.0 GHz Cortex-A53
GPU
Poco C81x
Mali-G57 MP1
Redmi Note 4X
Adreno 506
Card slot
Poco C81x
microSDXC (dedicated slot)
Redmi Note 4X
microSDXC (uses shared SIM slot)
Internal
Poco C81x
64GB 3GB RAM
Redmi Note 4X
16GB 3GB RAM, 32GB 3GB RAM, 64GB 4GB RAM
Other
Poco C81x
-
Redmi Note 4X
eMMC 5.1
Single
Poco C81x
13 MP, f/2.2, (wide)
Redmi Note 4X
13 MP, f/2.0, 1/3.1", 1.12µm, PDAF
Features
Poco C81x
LED flash, HDR
Redmi Note 4X
Dual-LED dual-tone flash, panorama, HDR
Video
Poco C81x
1080p@30fps
Redmi Note 4X
1080p@30fps, 720p@120fps
Single
Poco C81x
8 MP, f/2.0, (wide)
Redmi Note 4X
5 MP, f/2.0
Features
Poco C81x
HDR
Redmi Note 4X
-
Video
Poco C81x
1080p@30fps
Redmi Note 4X
1080p@30fps
Loudspeaker
Poco C81x
Yes
Redmi Note 4X
Yes
3.5mm jack
Poco C81x
Yes
Redmi Note 4X
Yes
Other
Poco C81x
-
Redmi Note 4X
24-bit/192kHz audio
WLAN
Poco C81x
Wi-Fi 802.11 a/b/g/n/ac, dual-band
Redmi Note 4X
Wi-Fi 802.11 a/b/g/n, Wi-Fi Direct
Bluetooth
Poco C81x
5.2, A2DP, LE
Redmi Note 4X
4.2, A2DP, LE
Positioning
Poco C81x
GPS, GALILEO, GLONASS, QZSS
Redmi Note 4X
GPS, GLONASS, BDS
NFC
Poco C81x
No
Redmi Note 4X
No
Radio
Poco C81x
FM radio
Redmi Note 4X
FM radio
USB
Poco C81x
USB Type-C 2.0, OTG
Redmi Note 4X
microUSB 2.0, OTG
Infrared port
Poco C81x
-
Redmi Note 4X
Yes
Sensors
Poco C81x
Fingerprint (side-mounted), accelerometer, compass
Redmi Note 4X
Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass
Other
Poco C81x
Virtual proximity sensing
Redmi Note 4X
-
Type
Poco C81x
5200 mAh
Redmi Note 4X
Li-Po 4100 mAh, non-removable
Charging
Poco C81x
15W wired 7.5W reverse wired
Redmi Note 4X
-
Colors
Poco C81x
Ice Blue, Crystal Black
Redmi Note 4X
Platinum Silver, Champagne Gold, Matte Black, Hatsune Miku, Sakura Powder
Price
Poco C81x
About 90 EUR
Redmi Note 4X
About 130 EUR