Screen size
Poco C81 ProWinner: 6.9"+28%
Redmi 4 (4X)5.0"
Quick verdict
Poco C81 Pro leads the measured specs 14-2.
Measured wins
Poco C81 Pro
14
spec wins
Overall winner
Ties
5
equal specs
Redmi 4 (4X)
2
spec wins
Screen size
Technology
Poco C81 Pro
GSM / HSPA / LTE
Redmi 4 (4X)
GSM / HSPA / LTE
2G bands
Poco C81 Pro
GSM 900 / 1800 / 1900
Redmi 4 (4X)
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G bands
Poco C81 Pro
HSDPA 850 / 900 / 2100 - International, HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 - LATAM
Redmi 4 (4X)
HSDPA 850 / 900 / 1900 / 2100
4G bands
Poco C81 Pro
1, 3, 5, 7, 8, 20, 28, 38, 40, 41 - International, 1, 2, 3, 4, 5, 7, 8, 13, 18, 19, 26, 28, 38, 40, 41, 66 - LATAM
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
equal specsFront camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
USB
equal specs5G support
equal specsNFC
3.5mm jack
equal specsSD card
equal specsStereo speakers
Redmi 4 (4X)
1, 3, 5, 7, 8, 38, 39, 40, 41
Speed
Poco C81 Pro
HSPA, LTE
Redmi 4 (4X)
HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/100 Mbps
Announced
Poco C81 Pro
2026, April 27
Redmi 4 (4X)
2017, May. Released 2017, May
Status
Poco C81 Pro
Available. Released 2026, April 27
Redmi 4 (4X)
Discontinued
Dimensions
Poco C81 Pro
171.6 x 79.5 x 8.2 mm (6.76 x 3.13 x 0.32 in)
Redmi 4 (4X)
139.2 x 70 x 8.7 mm (5.48 x 2.76 x 0.34 in)
Weight
Poco C81 Pro
208 g (7.34 oz)
Redmi 4 (4X)
150 g (5.29 oz)
Build
Poco C81 Pro
Glass front, plastic frame, plastic back
Redmi 4 (4X)
Glass front (Gorilla Glass), aluminum back, aluminum frame, plastic ends
SIM
Poco C81 Pro
Nano-SIM + Nano-SIM
Redmi 4 (4X)
Nano-SIM + Micro-SIM
Type
Poco C81 Pro
IPS LCD, 120Hz, 650 nits (typ), 800 nits (peak)
Redmi 4 (4X)
IPS LCD
Size
Poco C81 Pro
6.9 inches, 114.9 cm2 (~84.3% screen-to-body ratio)
Redmi 4 (4X)
5.0 inches, 68.9 cm2 (~70.7% screen-to-body ratio)
Resolution
Poco C81 Pro
720 x 1600 pixels, 20:9 ratio (~254 ppi density)
Redmi 4 (4X)
720 x 1280 pixels, 16:9 ratio (~294 ppi density)
Protection
Poco C81 Pro
-
Redmi 4 (4X)
Corning Gorilla Glass (unspecified version)
OS
Poco C81 Pro
Android 15, up to 4 major Android upgrades, HyperOS 3
Redmi 4 (4X)
Android 6.0.1 (Marshmallow), upgradable to 7.1.2 (Nougat), MIUI 11
Chipset
Poco C81 Pro
Unisoc T7250 (12 nm)
Redmi 4 (4X)
Qualcomm MSM8940 Snapdragon 435 (28 nm)
CPU
Poco C81 Pro
Octa-core (2x1.8 GHz Cortex-A75 & 6x1.6 GHz Cortex-A55)
Redmi 4 (4X)
Octa-core 1.4 GHz Cortex-A53
GPU
Poco C81 Pro
Mali-G57 MP1
Redmi 4 (4X)
Adreno 505
Card slot
Poco C81 Pro
microSDXC (dedicated slot)
Redmi 4 (4X)
microSDXC (uses shared SIM slot)
Internal
Poco C81 Pro
64GB 4GB RAM, 128GB 4GB RAM, 256GB 4GB RAM
Redmi 4 (4X)
16GB 2GB RAM, 16GB 3GB RAM, 32GB 3GB RAM, 64GB 3GB RAM, 64GB 4GB RAM
Other
Poco C81 Pro
UFS 2.2
Redmi 4 (4X)
eMMC 5.1
Single
Poco C81 Pro
13 MP, f/2.2, (wide), 1/3.06"
Redmi 4 (4X)
13 MP, f/2.0, PDAF
Features
Poco C81 Pro
LED flash, HDR
Redmi 4 (4X)
LED flash, HDR, panorama
Video
Poco C81 Pro
1080p@30fps
Redmi 4 (4X)
1080p@30fps
Single
Poco C81 Pro
8 MP, f/2.0, (wide)
Redmi 4 (4X)
5 MP, f/2.2
Features
Poco C81 Pro
HDR
Redmi 4 (4X)
-
Video
Poco C81 Pro
1080p@30fps
Redmi 4 (4X)
1080p@30fps
Loudspeaker
Poco C81 Pro
Yes
Redmi 4 (4X)
Yes
3.5mm jack
Poco C81 Pro
Yes
Redmi 4 (4X)
Yes
WLAN
Poco C81 Pro
Wi-Fi 802.11 a/b/g/n/ac, dual-band
Redmi 4 (4X)
Wi-Fi 802.11 b/g/n, Wi-Fi Direct
Bluetooth
Poco C81 Pro
5.2, A2DP, LE
Redmi 4 (4X)
4.2, A2DP, LE
Positioning
Poco C81 Pro
GPS, GALILEO, GLONASS, BDS
Redmi 4 (4X)
GPS, GLONASS, BDS
NFC
Poco C81 Pro
Yes (market/region dependent)
Redmi 4 (4X)
No
Radio
Poco C81 Pro
FM radio
Redmi 4 (4X)
FM radio
USB
Poco C81 Pro
USB Type-C 2.0
Redmi 4 (4X)
microUSB 2.0
Infrared port
Poco C81 Pro
-
Redmi 4 (4X)
Yes
Sensors
Poco C81 Pro
Fingerprint (side-mounted), accelerometer, compass
Redmi 4 (4X)
Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass
Other
Poco C81 Pro
Virtual proximity sensing
Redmi 4 (4X)
-
Type
Poco C81 Pro
6000 mAh
Redmi 4 (4X)
Li-Po 4100 mAh, non-removable
Charging
Poco C81 Pro
15W wired 7.5W reverse wired
Redmi 4 (4X)
-
Stand-by
Poco C81 Pro
-
Redmi 4 (4X)
Up to 432 h (3G)
Talk time
Poco C81 Pro
-
Redmi 4 (4X)
Up to 36 h (3G)
Music play
Poco C81 Pro
-
Redmi 4 (4X)
Up to 87 h
Colors
Poco C81 Pro
Black, Gold, Green
Redmi 4 (4X)
Black, Gold
Price
Poco C81 Pro
About 120 EUR
Redmi 4 (4X)
About 110 EUR
Models
Poco C81 Pro
-
Redmi 4 (4X)
2016060, 2016090, MAG138, MAE136, Redmi 4, Redmi 4X
SAR
Poco C81 Pro
-
Redmi 4 (4X)
0.77 W/kg (head) 0.83 W/kg (body)