Screen size
Poco C81xWinner: 6.9"+20%
Redmi Note 45.5"
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 4
4
spec wins
Screen size
Technology
Poco C81x
GSM / HSPA / LTE
Redmi Note 4
GSM / HSPA / LTE
2G bands
Poco C81x
GSM 850 / 900 / 1800 / 1900
Redmi Note 4
GSM 900 / 1800 / 1900 - SIM 1 & SIM 2
3G bands
Poco C81x
HSDPA 850 / 900 / 2100
Redmi Note 4
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 4
1, 3, 4, 5, 7, 8, 20, 38, 40
Speed
Poco C81x
HSPA, LTE
Redmi Note 4
HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps
Announced
Poco C81x
2026, April 23
Redmi Note 4
2017, January. Released 2017, January
Status
Poco C81x
Available. Released 2026, April 23
Redmi Note 4
Discontinued
Dimensions
Poco C81x
171.8 x 77.8 x 8.3 mm (6.76 x 3.06 x 0.33 in)
Redmi Note 4
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 4
165 g (5.82 oz)
SIM
Poco C81x
Nano-SIM + Nano-SIM
Redmi Note 4
Nano-SIM + Micro-SIM
Other
Poco C81x
Dust and splash resistant
Redmi Note 4
-
Build
Poco C81x
-
Redmi Note 4
Glass front, aluminum back, aluminum frame
Type
Poco C81x
IPS LCD, 120Hz, 650 nits (HBM)
Redmi Note 4
IPS LCD
Size
Poco C81x
6.88 inches, 112.4 cm2 (~84.1% screen-to-body ratio)
Redmi Note 4
5.5 inches, 83.4 cm2 (~72.7% screen-to-body ratio)
Resolution
Poco C81x
720 x 1640 pixels (~260 ppi density)
Redmi Note 4
1080 x 1920 pixels, 16:9 ratio (~401 ppi density)
OS
Poco C81x
Android 15, up to 2 major Android upgrades
Redmi Note 4
Android 6.0 (Marshmallow), upgradable to 7.0 (Nougat), MIUI 11
Chipset
Poco C81x
Unisoc T7250 (12 nm)
Redmi Note 4
Qualcomm MSM8953 Snapdragon 625 (14 nm)
CPU
Poco C81x
Octa-core (2x1.8 GHz Cortex-A75 & 6x1.6 GHz Cortex-A55)
Redmi Note 4
Octa-core 2.0 GHz Cortex-A53
GPU
Poco C81x
Mali-G57 MP1
Redmi Note 4
Adreno 506
Card slot
Poco C81x
microSDXC (dedicated slot)
Redmi Note 4
microSDXC (uses shared SIM slot)
Internal
Poco C81x
64GB 3GB RAM
Redmi Note 4
32GB 3GB RAM, 64GB 3GB RAM, 64GB 4GB RAM
Other
Poco C81x
-
Redmi Note 4
eMMC 5.1
Single
Poco C81x
13 MP, f/2.2, (wide)
Redmi Note 4
13 MP, f/2.0, 1/3.1", 1.12µm, PDAF
Features
Poco C81x
LED flash, HDR
Redmi Note 4
Dual-LED dual-tone flash, panorama, HDR
Video
Poco C81x
1080p@30fps
Redmi Note 4
1080p@30fps, 720p@120fps
Single
Poco C81x
8 MP, f/2.0, (wide)
Redmi Note 4
5 MP, f/2.0
Features
Poco C81x
HDR
Redmi Note 4
-
Video
Poco C81x
1080p@30fps
Redmi Note 4
1080p@30fps
Loudspeaker
Poco C81x
Yes
Redmi Note 4
Yes
3.5mm jack
Poco C81x
Yes
Redmi Note 4
Yes
Other
Poco C81x
-
Redmi Note 4
24-bit/192kHz audio
WLAN
Poco C81x
Wi-Fi 802.11 a/b/g/n/ac, dual-band
Redmi Note 4
Wi-Fi 802.11 a/b/g/n, Wi-Fi Direct
Bluetooth
Poco C81x
5.2, A2DP, LE
Redmi Note 4
4.1, A2DP, LE
Positioning
Poco C81x
GPS, GALILEO, GLONASS, QZSS
Redmi Note 4
GPS, GLONASS, BDS
NFC
Poco C81x
No
Redmi Note 4
No
Radio
Poco C81x
FM radio
Redmi Note 4
FM radio
USB
Poco C81x
USB Type-C 2.0, OTG
Redmi Note 4
microUSB 2.0, OTG
Infrared port
Poco C81x
-
Redmi Note 4
Yes
Sensors
Poco C81x
Fingerprint (side-mounted), accelerometer, compass
Redmi Note 4
Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass
Other
Poco C81x
Virtual proximity sensing
Redmi Note 4
-
Type
Poco C81x
5200 mAh
Redmi Note 4
Li-Po 4100 mAh, non-removable
Charging
Poco C81x
15W wired 7.5W reverse wired
Redmi Note 4
-
Colors
Poco C81x
Ice Blue, Crystal Black
Redmi Note 4
Dark Gray, Gold, Black, Lake Blue
Price
Poco C81x
About 90 EUR
Redmi Note 4
About 150 EUR
Models
Poco C81x
-
Redmi Note 4
2016100
SAR EU
Poco C81x
-
Redmi Note 4
0.72 W/kg (head) 0.67 W/kg (body)