Product
Xiaomi Mi 4i
Xiaomi Mi 4i
Xiaomi Redmi 4 Prime
Xiaomi Redmi 4 Prime
Battery
Charging 10W wired, QC1 10W wired
Talk time Up to 35 h (3G) -
Type Li-Ion 3120 mAh, non-removable Li-Po 4100 mAh, non-removable
Body
Build Glass front (Gorilla Glass), plastic back, plastic frame Glass front, aluminum back, aluminum frame
Dimensions 138.1 x 69.6 x 7.8 mm (5.44 x 2.74 x 0.31 in) 141.3 x 69.6 x 8.9 mm (5.56 x 2.74 x 0.35 in)
SIM Dual SIM (Micro-SIM, dual stand-by) Hybrid Dual SIM
Weight 130 g (4.59 oz) 156 g (5.50 oz)
Comms
Bluetooth 4.1, A2DP 4.2, A2DP, LE
Infrared port - Yes
NFC No No
Positioning GPS, GLONASS, BDS GPS, GLONASS, BDS
Radio Stereo FM radio FM radio
USB microUSB 2.0, OTG microUSB 2.0, OTG
WLAN Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot Wi-Fi 802.11 a/b/g/n, dual-band, Wi-Fi Direct
Display
Protection Corning scratch-resistant glass -
Resolution 1080 x 1920 pixels, 16:9 ratio (~441 ppi density) 1080 x 1920 pixels, 16:9 ratio (~441 ppi density)
Size 5.0 inches, 68.9 cm2 (~71.7% screen-to-body ratio) 5.0 inches, 68.9 cm2 (~70.1% screen-to-body ratio)
Type IPS LCD IPS LCD
Features
Sensors Accelerometer, gyro, proximity, compass Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass
Launch
Announced 2015, April. Released 2015, April 2016, November. Released 2016, November
Status Discontinued Discontinued
Main Camera
Features Dual-LED dual-tone flash, panorama, HDR Dual-LED dual-tone flash, HDR, panorama
Single 13 MP, f/2.0, AF 13 MP, f/2.2, PDAF
Video 1080p@30fps, 480p@120fps 1080p@30fps
Memory
Card slot No microSDXC (uses shared SIM slot)
Internal 16GB 2GB RAM, 32GB 2GB RAM 32GB 3GB RAM
  eMMC 4.5 eMMC 5.1
Misc
Colors Dark Gray, Black, White, Yellow, Blue, Pink Gold, Dark Gray, Silver
Models 2015015 -
SAR 0.51 W/kg (head)     0.60 W/kg (body)     -
Network
2G bands GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G bands HSDPA 850 / 1900 / 2100 HSDPA 850 / 900 / 1900 / 2100
4G bands 3, 7, 38, 39, 40, 41 1, 3, 7, 38, 39, 40, 41
Speed HSPA, LTE Cat4 150/50 Mbps HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps
Technology GSM / HSPA / LTE GSM / CDMA / HSPA / EVDO / LTE
  TD-SCDMA CDMA2000 1xEV-DO & TD-SCDMA
Our Tests
Battery (old) Endurance rating 67h Endurance rating 91h
Camera Photo / Video Photo / Video
Display Contrast ratio: 1055:1 (nominal), 2.641 (sunlight) -
Loudspeaker Voice 63dB / Noise 65dB / Ring 68dB -
Performance Basemark X: 4875 -
Platform
Chipset Qualcomm MSM8939 Snapdragon 615 (28 nm) Qualcomm MSM8953 Snapdragon 625 (14 nm)
CPU Octa-core (4x1.7 GHz Cortex-A53 & 4x1.0 GHz Cortex-A53) Octa-core 2.0 GHz Cortex-A53
GPU Adreno 405 Adreno 506
OS Android 5.0.2 (Lollipop), MIUI 8.2 Android 6.0.1 (Marshmallow), MIUI 8
Selfie camera
Single 5 MP, f/1.8 5 MP, f/2.2
Video 1080p@30fps
Sound
3.5mm jack Yes Yes
Loudspeaker Yes Yes