Screen size
Mi 4i5.0"
Poco C81 ProWinner: 6.9"+28%
Quick verdict
Poco C81 Pro leads the measured specs 13-4.
Measured wins
Mi 4i
4
spec wins
Ties
4
equal specs
Poco C81 Pro
13
spec wins
Overall winner
Screen size
Technology
Mi 4i
GSM / HSPA / LTE
Poco C81 Pro
GSM / HSPA / LTE
2G bands
Mi 4i
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
Poco C81 Pro
GSM 900 / 1800 / 1900
3G bands
Mi 4i
HSDPA 850 / 1900 / 2100 , TD-SCDMA
Poco C81 Pro
HSDPA 850 / 900 / 2100 - International, HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 - LATAM
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
3.5mm jack
equal specsSD card
Stereo speakers
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
Speed
Mi 4i
HSPA, LTE Cat4 150/50 Mbps
Poco C81 Pro
HSPA, LTE
Announced
Mi 4i
2015, April. Released 2015, April
Poco C81 Pro
2026, April 27
Status
Mi 4i
Discontinued
Poco C81 Pro
Available. Released 2026, April 27
Dimensions
Mi 4i
138.1 x 69.6 x 7.8 mm (5.44 x 2.74 x 0.31 in)
Poco C81 Pro
171.6 x 79.5 x 8.2 mm (6.76 x 3.13 x 0.32 in)
Weight
Mi 4i
130 g (4.59 oz)
Poco C81 Pro
208 g (7.34 oz)
Build
Mi 4i
Glass front (Gorilla Glass), plastic back, plastic frame
Poco C81 Pro
Glass front, plastic frame, plastic back
SIM
Mi 4i
Dual SIM (Micro-SIM, dual stand-by)
Poco C81 Pro
Nano-SIM + Nano-SIM
Type
Mi 4i
IPS LCD
Poco C81 Pro
IPS LCD, 120Hz, 650 nits (typ), 800 nits (peak)
Size
Mi 4i
5.0 inches, 68.9 cm2 (~71.7% screen-to-body ratio)
Poco C81 Pro
6.9 inches, 114.9 cm2 (~84.3% screen-to-body ratio)
Resolution
Mi 4i
1080 x 1920 pixels, 16:9 ratio (~441 ppi density)
Poco C81 Pro
720 x 1600 pixels, 20:9 ratio (~254 ppi density)
Protection
Mi 4i
Corning scratch-resistant glass
Poco C81 Pro
-
OS
Mi 4i
Android 5.0.2 (Lollipop), MIUI 8.2
Poco C81 Pro
Android 15, up to 4 major Android upgrades, HyperOS 3
Chipset
Mi 4i
Qualcomm MSM8939 Snapdragon 615 (28 nm)
Poco C81 Pro
Unisoc T7250 (12 nm)
CPU
Mi 4i
Octa-core (4x1.7 GHz Cortex-A53 & 4x1.0 GHz Cortex-A53)
Poco C81 Pro
Octa-core (2x1.8 GHz Cortex-A75 & 6x1.6 GHz Cortex-A55)
GPU
Mi 4i
Adreno 405
Poco C81 Pro
Mali-G57 MP1
Card slot
Mi 4i
No
Poco C81 Pro
microSDXC (dedicated slot)
Internal
Mi 4i
16GB 2GB RAM, 32GB 2GB RAM
Poco C81 Pro
64GB 4GB RAM, 128GB 4GB RAM, 256GB 4GB RAM
Other
Mi 4i
eMMC 4.5
Poco C81 Pro
UFS 2.2
Single
Mi 4i
13 MP, f/2.0, AF
Poco C81 Pro
13 MP, f/2.2, (wide), 1/3.06"
Features
Mi 4i
Dual-LED dual-tone flash, panorama, HDR
Poco C81 Pro
LED flash, HDR
Video
Mi 4i
1080p@30fps, 480p@120fps
Poco C81 Pro
1080p@30fps
Single
Mi 4i
5 MP, f/1.8
Poco C81 Pro
8 MP, f/2.0, (wide)
Video
Mi 4i
Poco C81 Pro
1080p@30fps
Features
Mi 4i
-
Poco C81 Pro
HDR
Loudspeaker
Mi 4i
Yes
Poco C81 Pro
Yes
3.5mm jack
Mi 4i
Yes
Poco C81 Pro
Yes
WLAN
Mi 4i
Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot
Poco C81 Pro
Wi-Fi 802.11 a/b/g/n/ac, dual-band
Bluetooth
Mi 4i
4.1, A2DP
Poco C81 Pro
5.2, A2DP, LE
Positioning
Mi 4i
GPS, GLONASS, BDS
Poco C81 Pro
GPS, GALILEO, GLONASS, BDS
NFC
Mi 4i
No
Poco C81 Pro
Yes (market/region dependent)
Radio
Mi 4i
Stereo FM radio
Poco C81 Pro
FM radio
USB
Mi 4i
microUSB 2.0, OTG
Poco C81 Pro
USB Type-C 2.0
Sensors
Mi 4i
Accelerometer, gyro, proximity, compass
Poco C81 Pro
Fingerprint (side-mounted), accelerometer, compass
Other
Mi 4i
-
Poco C81 Pro
Virtual proximity sensing
Type
Mi 4i
Li-Ion 3120 mAh, non-removable
Poco C81 Pro
6000 mAh
Charging
Mi 4i
10W wired, QC1
Poco C81 Pro
15W wired 7.5W reverse wired
Talk time
Mi 4i
Up to 35 h (3G)
Poco C81 Pro
-
Colors
Mi 4i
Dark Gray, Black, White, Yellow, Blue, Pink
Poco C81 Pro
Black, Gold, Green
Models
Mi 4i
2015015
Poco C81 Pro
-
SAR
Mi 4i
0.51 W/kg (head) 0.60 W/kg (body)
Poco C81 Pro
-
Price
Mi 4i
About 260 EUR
Poco C81 Pro
About 120 EUR