Product
Xiaomi Mi 4s
Xiaomi Mi 4s
Xiaomi Mi Note 3
Xiaomi Mi Note 3
Battery
Charging 18W wired, QC2, 40% in 60 min 18W wired, QC3
Type Li-Ion 3260 mAh, non-removable Li-Ion 3500 mAh, non-removable
Body
Build - Glass front (Gorilla Glass 4), glass back, aluminum frame
Dimensions 139.3 x 70.8 x 7.8 mm (5.48 x 2.79 x 0.31 in) 152.6 x 74 x 7.6 mm (6.01 x 2.91 x 0.30 in)
SIM Nano-SIM + Micro-SIM Nano-SIM + Nano-SIM
Weight 133 g (4.69 oz) 163 g (5.75 oz)
Comms
Bluetooth 4.1, A2DP 5.0, A2DP, LE
Infrared port Yes Yes
NFC No Yes
Positioning GPS, GLONASS, BDS GPS, GLONASS, BDS
Radio No No
USB USB Type-C USB Type-C
WLAN Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Display
Protection - Corning Gorilla Glass 4
Resolution 1080 x 1920 pixels, 16:9 ratio (~441 ppi density) 1080 x 1920 pixels, 16:9 ratio (~401 ppi density)
Size 5.0 inches, 68.9 cm2 (~69.9% screen-to-body ratio) 5.5 inches, 83.4 cm2 (~73.8% screen-to-body ratio)
Type IPS LCD IPS LCD
Features
Sensors Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass Fingerprint (front-mounted), accelerometer, gyro, proximity, compass, barometer
Launch
Announced 2016, February. Released 2016, March 2017, September. Released 2017, September
Status Discontinued Discontinued
Main Camera
Dual - 12 MP, f/1.8, 27mm (wide), PDAF, 4-axis OIS 12 MP, f/2.6, 52mm (telephoto), AF, 2x optical zoom
Features Dual-LED dual-tone flash, panorama, HDR Dual-LED dual-tone flash, HDR, panorama
Single 13 MP, f/2.0, PDAF -
Video 1080p@30fps, 720p@120fps 4K@30fps, 720p@120fps
Memory
Card slot microSDXC (uses shared SIM slot) No
Internal 64GB 3GB RAM 64GB 6GB RAM, 128GB 6GB RAM
  eMMC 5.0 eMMC 5.1
Misc
Colors Black, White, Gold, Pink Black, Blue
Models - MCE8
SAR - 0.50 W/kg (head)     1.54 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 / 1700(AWS) / 1900 / 2100
4G bands 1, 3, 7, 38, 39, 40, 41 1, 3, 5, 7, 8, 34, 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 / CDMA / HSPA / LTE GSM / CDMA / HSPA / EVDO / LTE
  TD-SCDMA CDMA2000 1xEV-DO
Our Tests
Audio quality Noise -94.9dB / Crosstalk -82.6dB -
Battery (old) Endurance rating 75h -
Camera Photo / Video -
Display Contrast ratio: 975:1 (nominal), 2.095 (sunlight) -
Loudspeaker Voice 73dB / Noise 68dB / Ring 82dB -
Performance Basemark OS II 2.0: 1545Basemark X: 12990 -
Platform
Chipset Qualcomm MSM8992 Snapdragon 808 (20 nm) Qualcomm SDM660 Snapdragon 660 (14 nm)
CPU Hexa-core (4x1.4 GHz Cortex-A53 & 2x1.8 GHz Cortex-A57) Octa-core (4x2.2 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver)
GPU Adreno 418 Adreno 512
OS Android 5.1 (Lollipop), upgradable to 7.0 (Nougat), MIUI 10 Android 7.1 (Nougat), upgradable to Android 9, MIUI 12
Selfie camera
Single 5 MP, f/2.0 16 MP, f/2.5, (wide), 1/3.06" 1.0µm
Video 1080p@30fps 1080p@30fps
Sound
3.5mm jack Yes No
Loudspeaker Yes Yes, with stereo speakers
  - 24-bit/192kHz audio