Product
Xiaomi Mi 4
Xiaomi Mi 4
₹14,999
Xiaomi Redmi 3x
Xiaomi Redmi 3x
₹17,384
Battery
Charging 18W wired, QC2 10W wired
Stand-by Up to 280 h (3G) -
Type Li-Ion 3080 mAh, non-removable Li-Ion 4100 mAh, non-removable
Body
Build Glass front, plastic back, aluminum frame Glass front, aluminum/plastic back, aluminum frame
Dimensions 139.2 x 68.5 x 8.9 mm (5.48 x 2.70 x 0.35 in) 139.3 x 69.6 x 8.5 mm (5.48 x 2.74 x 0.33 in)
SIM Micro-SIM Nano-SIM + Micro-SIM
Weight 149 g (5.26 oz) 144 g (5.08 oz)
Comms
Bluetooth 4.0, A2DP 4.1, A2DP
Infrared port Yes Yes
NFC No No
Positioning GPS, GLONASS, BDS GPS, GLONASS, BDS
Radio FM radio FM radio
USB microUSB 2.0, OTG microUSB 2.0
WLAN Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, DLNA, hotspot Wi-Fi 802.11 b/g/n, Wi-Fi Direct
Display
Resolution 1080 x 1920 pixels, 16:9 ratio (~441 ppi density) 720 x 1280 pixels, 16:9 ratio (~294 ppi density)
Size 5.0 inches, 68.9 cm2 (~72.3% screen-to-body ratio) 5.0 inches, 68.9 cm2 (~71.1% screen-to-body ratio)
Type IPS LCD IPS LCD
Features
Sensors Accelerometer, gyro, proximity, compass, barometer Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass
Launch
Announced 2014, July. Released 2014, August 2016, June. Released 2016, July
Status Discontinued Discontinued
Main Camera
Features LED flash, panorama, HDR LED flash, HDR, panorama
Single 13 MP, f/1.8, 1/3.1", 1.12µm, AF 13 MP, f/2.0, PDAF
Video 4K@30fps, 1080p@30fps, 720p@120fps, HDR 1080p@30fps
Memory
Card slot No microSDXC (uses shared SIM slot)
Internal 16GB 2GB RAM, 64GB 3GB RAM 32GB 2GB RAM
  eMMC 5.0 eMMC 5.1
Misc
Colors Black, White Gold, Dark Gray, Silver
Models 2014215 -
SAR 0.71 W/kg (head)     0.85 W/kg (body)     -
Network
2G bands GSM 850 / 900 / 1800 / 1900 - all versions GSM 900 / 1800 / 1900 - SIM 1 & SIM 2
3G bands TD-SCDMA - 4G model HSDPA 850 / 900 / 1900 / 2100
4G bands 38, 39, 40 - 4G model 1, 3, 7, 38, 39, 40, 41
EDGE Yes -
GPRS Yes -
Speed HSPA, LTE, EV-DO Rev.A 3.1 Mbps HSPA, LTE, EV-DO Rev.A 3.1 Mbps
Technology GSM / CDMA / HSPA / EVDO / LTE GSM / CDMA / HSPA / EVDO / LTE
  CDMA2000 1xEV-DO - Telecom 3G model CDMA2000 1xEV-DO
Our Tests
Audio quality Noise -91.6dB / Crosstalk -49.7dB -
Battery (old) Endurance rating 68h -
Camera Photo / Video -
Display Contrast ratio: 929 (nominal), 2.424 (sunlight) -
Loudspeaker Voice 62dB / Noise 62dB / Ring 66dB -
Platform
Chipset Qualcomm MSM8974AC Snapdragon 801 (28 nm) Qualcomm MSM8937 Snapdragon 430 (28 nm)
CPU Quad-core 2.5 GHz Krait 400 Octa-core 1.4 GHz Cortex-A53
GPU Adreno 330 Adreno 505
OS Android 4.4.3 (KitKat), upgradable to 6.0.1 (Marshmallow), MIUI 10 Android 6.0.1 (Marshmallow), MIUI 7.3
Selfie camera
Single 8 MP, f/1.8 5 MP, f/2.2
Video 1080p@30fps 1080p@30fps
Sound
3.5mm jack Yes Yes
Loudspeaker Yes Yes
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