Screen size
Mi 45.0"
Poco C81xWinner: 6.9"+27%
Quick verdict
Poco C81x leads the measured specs 10-5.
Measured wins
Mi 4
5
spec wins
Ties
6
equal specs
Poco C81x
10
spec wins
Overall winner
Screen size
Technology
Mi 4
GSM / CDMA / HSPA / EVDO / LTE
Poco C81x
GSM / HSPA / LTE
2G bands
Mi 4
GSM 850 / 900 / 1800 / 1900 - all versions, CDMA 800 / 1900 - Telecom 3G model
Poco C81x
GSM 850 / 900 / 1800 / 1900
3G bands
Mi 4
TD-SCDMA - 4G model, HSDPA 850 / 900 / 1900 / 2100 - Unicom 3G model, Telecom 3G model, CDMA2000 1xEV-DO - Telecom 3G model
Poco C81x
HSDPA 850 / 900 / 2100
4G bands
Mi 4
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
equal specsFront camera
equal specsBattery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
USB
equal specs5G support
equal specsNFC
equal specs3.5mm jack
equal specsSD card
Stereo speakers
38, 39, 40 - 4G model
Poco C81x
1, 3, 5, 8, 28, 40, 41
Speed
Mi 4
HSPA, LTE, EV-DO Rev.A 3.1 Mbps
Poco C81x
HSPA, LTE
GPRS
Mi 4
Yes
Poco C81x
-
EDGE
Mi 4
Yes
Poco C81x
-
Announced
Mi 4
2014, July. Released 2014, August
Poco C81x
2026, April 23
Status
Mi 4
Discontinued
Poco C81x
Available. Released 2026, April 23
Dimensions
Mi 4
139.2 x 68.5 x 8.9 mm (5.48 x 2.70 x 0.35 in)
Poco C81x
171.8 x 77.8 x 8.3 mm (6.76 x 3.06 x 0.33 in)
Weight
Mi 4
149 g (5.26 oz)
Poco C81x
193 g (6.81 oz)
Build
Mi 4
Glass front, plastic back, aluminum frame
Poco C81x
-
SIM
Mi 4
Micro-SIM
Poco C81x
Nano-SIM + Nano-SIM
Other
Mi 4
-
Poco C81x
Dust and splash resistant
Type
Mi 4
IPS LCD
Poco C81x
IPS LCD, 120Hz, 650 nits (HBM)
Size
Mi 4
5.0 inches, 68.9 cm2 (~72.3% screen-to-body ratio)
Poco C81x
6.88 inches, 112.4 cm2 (~84.1% screen-to-body ratio)
Resolution
Mi 4
1080 x 1920 pixels, 16:9 ratio (~441 ppi density)
Poco C81x
720 x 1640 pixels (~260 ppi density)
OS
Mi 4
Android 4.4.3 (KitKat), upgradable to 6.0.1 (Marshmallow), MIUI 10
Poco C81x
Android 15, up to 2 major Android upgrades
Chipset
Mi 4
Qualcomm MSM8974AC Snapdragon 801 (28 nm)
Poco C81x
Unisoc T7250 (12 nm)
CPU
Mi 4
Quad-core 2.5 GHz Krait 400
Poco C81x
Octa-core (2x1.8 GHz Cortex-A75 & 6x1.6 GHz Cortex-A55)
GPU
Mi 4
Adreno 330
Poco C81x
Mali-G57 MP1
Card slot
Mi 4
No
Poco C81x
microSDXC (dedicated slot)
Internal
Mi 4
16GB 2GB RAM, 64GB 3GB RAM
Poco C81x
64GB 3GB RAM
Other
Mi 4
eMMC 5.0
Poco C81x
-
Single
Mi 4
13 MP, f/1.8, 1/3.1", 1.12µm, AF
Poco C81x
13 MP, f/2.2, (wide)
Features
Mi 4
LED flash, panorama, HDR
Poco C81x
LED flash, HDR
Video
Mi 4
4K@30fps, 1080p@30fps, 720p@120fps, HDR
Poco C81x
1080p@30fps
Single
Mi 4
8 MP, f/1.8
Poco C81x
8 MP, f/2.0, (wide)
Video
Mi 4
1080p@30fps
Poco C81x
1080p@30fps
Features
Mi 4
-
Poco C81x
HDR
Loudspeaker
Mi 4
Yes
Poco C81x
Yes
3.5mm jack
Mi 4
Yes
Poco C81x
Yes
WLAN
Mi 4
Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, DLNA, hotspot
Poco C81x
Wi-Fi 802.11 a/b/g/n/ac, dual-band
Bluetooth
Mi 4
4.0, A2DP
Poco C81x
5.2, A2DP, LE
Positioning
Mi 4
GPS, GLONASS, BDS
Poco C81x
GPS, GALILEO, GLONASS, QZSS
NFC
Mi 4
No
Poco C81x
No
Infrared port
Mi 4
Yes
Poco C81x
-
Radio
Mi 4
FM radio
Poco C81x
FM radio
USB
Mi 4
microUSB 2.0, OTG
Poco C81x
USB Type-C 2.0, OTG
Sensors
Mi 4
Accelerometer, gyro, proximity, compass, barometer
Poco C81x
Fingerprint (side-mounted), accelerometer, compass
Other
Mi 4
-
Poco C81x
Virtual proximity sensing
Type
Mi 4
Li-Ion 3080 mAh, non-removable
Poco C81x
5200 mAh
Charging
Mi 4
18W wired, QC2
Poco C81x
15W wired 7.5W reverse wired
Stand-by
Mi 4
Up to 280 h (3G)
Poco C81x
-
Colors
Mi 4
Black, White
Poco C81x
Ice Blue, Crystal Black
Models
Mi 4
2014215
Poco C81x
-
SAR
Mi 4
0.71 W/kg (head) 0.85 W/kg (body)
Poco C81x
-
Price
Mi 4
About 230 EUR
Poco C81x
About 90 EUR