Screen size
Mi 4i5.0"
Poco C81xWinner: 6.9"+27%
Quick verdict
Poco C81x leads the measured specs 12-4.
Measured wins
Mi 4i
4
spec wins
Ties
5
equal specs
Poco C81x
12
spec wins
Overall winner
Screen size
Technology
Mi 4i
GSM / HSPA / LTE
Poco C81x
GSM / HSPA / LTE
2G bands
Mi 4i
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
Poco C81x
GSM 850 / 900 / 1800 / 1900
3G bands
Mi 4i
HSDPA 850 / 1900 / 2100 , TD-SCDMA
Poco C81x
HSDPA 850 / 900 / 2100
4G bands
Mi 4i
3, 7, 38, 39, 40, 41
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
equal specs3.5mm jack
equal specsSD card
Stereo speakers
Poco C81x
1, 3, 5, 8, 28, 40, 41
Speed
Mi 4i
HSPA, LTE Cat4 150/50 Mbps
Poco C81x
HSPA, LTE
Announced
Mi 4i
2015, April. Released 2015, April
Poco C81x
2026, April 23
Status
Mi 4i
Discontinued
Poco C81x
Available. Released 2026, April 23
Dimensions
Mi 4i
138.1 x 69.6 x 7.8 mm (5.44 x 2.74 x 0.31 in)
Poco C81x
171.8 x 77.8 x 8.3 mm (6.76 x 3.06 x 0.33 in)
Weight
Mi 4i
130 g (4.59 oz)
Poco C81x
193 g (6.81 oz)
Build
Mi 4i
Glass front (Gorilla Glass), plastic back, plastic frame
Poco C81x
-
SIM
Mi 4i
Dual SIM (Micro-SIM, dual stand-by)
Poco C81x
Nano-SIM + Nano-SIM
Other
Mi 4i
-
Poco C81x
Dust and splash resistant
Type
Mi 4i
IPS LCD
Poco C81x
IPS LCD, 120Hz, 650 nits (HBM)
Size
Mi 4i
5.0 inches, 68.9 cm2 (~71.7% screen-to-body ratio)
Poco C81x
6.88 inches, 112.4 cm2 (~84.1% screen-to-body ratio)
Resolution
Mi 4i
1080 x 1920 pixels, 16:9 ratio (~441 ppi density)
Poco C81x
720 x 1640 pixels (~260 ppi density)
Protection
Mi 4i
Corning scratch-resistant glass
Poco C81x
-
OS
Mi 4i
Android 5.0.2 (Lollipop), MIUI 8.2
Poco C81x
Android 15, up to 2 major Android upgrades
Chipset
Mi 4i
Qualcomm MSM8939 Snapdragon 615 (28 nm)
Poco C81x
Unisoc T7250 (12 nm)
CPU
Mi 4i
Octa-core (4x1.7 GHz Cortex-A53 & 4x1.0 GHz Cortex-A53)
Poco C81x
Octa-core (2x1.8 GHz Cortex-A75 & 6x1.6 GHz Cortex-A55)
GPU
Mi 4i
Adreno 405
Poco C81x
Mali-G57 MP1
Card slot
Mi 4i
No
Poco C81x
microSDXC (dedicated slot)
Internal
Mi 4i
16GB 2GB RAM, 32GB 2GB RAM
Poco C81x
64GB 3GB RAM
Other
Mi 4i
eMMC 4.5
Poco C81x
-
Single
Mi 4i
13 MP, f/2.0, AF
Poco C81x
13 MP, f/2.2, (wide)
Features
Mi 4i
Dual-LED dual-tone flash, panorama, HDR
Poco C81x
LED flash, HDR
Video
Mi 4i
1080p@30fps, 480p@120fps
Poco C81x
1080p@30fps
Single
Mi 4i
5 MP, f/1.8
Poco C81x
8 MP, f/2.0, (wide)
Video
Mi 4i
Poco C81x
1080p@30fps
Features
Mi 4i
-
Poco C81x
HDR
Loudspeaker
Mi 4i
Yes
Poco C81x
Yes
3.5mm jack
Mi 4i
Yes
Poco C81x
Yes
WLAN
Mi 4i
Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot
Poco C81x
Wi-Fi 802.11 a/b/g/n/ac, dual-band
Bluetooth
Mi 4i
4.1, A2DP
Poco C81x
5.2, A2DP, LE
Positioning
Mi 4i
GPS, GLONASS, BDS
Poco C81x
GPS, GALILEO, GLONASS, QZSS
NFC
Mi 4i
No
Poco C81x
No
Radio
Mi 4i
Stereo FM radio
Poco C81x
FM radio
USB
Mi 4i
microUSB 2.0, OTG
Poco C81x
USB Type-C 2.0, OTG
Sensors
Mi 4i
Accelerometer, gyro, proximity, compass
Poco C81x
Fingerprint (side-mounted), accelerometer, compass
Other
Mi 4i
-
Poco C81x
Virtual proximity sensing
Type
Mi 4i
Li-Ion 3120 mAh, non-removable
Poco C81x
5200 mAh
Charging
Mi 4i
10W wired, QC1
Poco C81x
15W wired 7.5W reverse wired
Talk time
Mi 4i
Up to 35 h (3G)
Poco C81x
-
Colors
Mi 4i
Dark Gray, Black, White, Yellow, Blue, Pink
Poco C81x
Ice Blue, Crystal Black
Models
Mi 4i
2015015
Poco C81x
-
SAR
Mi 4i
0.51 W/kg (head) 0.60 W/kg (body)
Poco C81x
-
Price
Mi 4i
About 260 EUR
Poco C81x
About 90 EUR