Product
Xiaomi Redmi 3s
Xiaomi Redmi 3s
Xiaomi Redmi Note 4X
Xiaomi Redmi Note 4X
Battery
Charging 10W wired -
Type Li-Ion 4100 mAh, non-removable Li-Po 4100 mAh, non-removable
Body
Build Glass front, aluminum back, aluminum frame Glass front, aluminum back, aluminum frame
Dimensions 139.3 x 69.6 x 8.5 mm (5.48 x 2.74 x 0.33 in) 151 x 76 x 8.5 mm (5.94 x 2.99 x 0.33 in)
SIM Nano-SIM + Micro-SIM Nano-SIM + Micro-SIM
Weight 144 g (5.08 oz) 165 g (5.82 oz)
Comms
Bluetooth 4.1, A2DP 4.2, A2DP, LE
Infrared port Yes Yes
NFC No No
Positioning GPS, GLONASS, BDS GPS, GLONASS, BDS
Radio FM radio FM radio
USB microUSB 2.0 microUSB 2.0, OTG
WLAN Wi-Fi 802.11 b/g/n, Wi-Fi Direct Wi-Fi 802.11 a/b/g/n, Wi-Fi Direct
Display
Resolution 720 x 1280 pixels, 16:9 ratio (~294 ppi density) 1080 x 1920 pixels, 16:9 ratio (~401 ppi density)
Size 5.0 inches, 68.9 cm2 (~71.1% screen-to-body ratio) 5.5 inches, 83.4 cm2 (~72.7% screen-to-body ratio)
Type IPS LCD IPS LCD
Features
Sensors Accelerometer, gyro, proximity, compass Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass
Launch
Announced 2016, June. Released 2016, June 2017, February. Released 2017, February
Status Discontinued Discontinued
Main Camera
Features LED flash, HDR, panorama Dual-LED dual-tone flash, panorama, HDR
Single 13 MP, f/2.0, PDAF 13 MP, f/2.0, 1/3.1", 1.12µm, PDAF
Video 1080p@30fps 1080p@30fps, 720p@120fps
Memory
Card slot microSDXC (uses shared SIM slot) microSDXC (uses shared SIM slot)
Internal 16GB 2GB RAM, 32GB 3GB RAM 16GB 3GB RAM, 32GB 3GB RAM, 64GB 4GB RAM
  eMMC 5.1 eMMC 5.1
Misc
Colors Gold, Dark Gray, Silver Platinum Silver, Champagne Gold, Matte Black, Hatsune Miku, Sakura Powder
Models 2016031 -
SAR 0.22 W/kg (head)     1.22 W/kg (body)     -
SAR EU 0.62 W/kg (head)     0.43 W/kg (body)     -
Network
2G bands GSM 900 / 1800 - SIM 1 & SIM 2 GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G bands HSDPA 900 / 2100 HSDPA 850 / 900 / 1900 / 2100
4G bands 3, 5, 40 - India 1, 3, 5, 7, 38, 39, 40, 41 - Snapdragon model
Speed HSPA, LTE HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps
Technology GSM / HSPA / LTE GSM / CDMA / HSPA / LTE
  - 1, 3, 5, 7, 8, 38, 39, 40, 41 - Mediatek model
Our Tests
Audio quality Noise -94.3dB / Crosstalk -91.8dB -
Battery (old) Endurance rating 104h -
Camera Photo / Video -
Display Contrast ratio: 1087:1 (nominal), 2.913 (sunlight) -
Loudspeaker Voice 66dB / Noise 70dB / Ring 70dB -
Performance Basemark OS II 2.0: 882Basemark X: 7263 -
Platform
Chipset Qualcomm MSM8937 Snapdragon 430 (28 nm) Qualcomm MSM8953 Snapdragon 625 (14 nm)
CPU Octa-core 1.4 GHz Cortex-A53 Octa-core 2.0 GHz Cortex-A53
GPU Adreno 505 Adreno 506
OS Android 6.0.1 (Marshmallow), MIUI 9.2 Android 6.0 (Marshmallow), upgradable to 7.0 (Nougat), MIUI 10
Selfie camera
Single 5 MP, f/2.2 5 MP, f/2.0
Video 1080p@30fps 1080p@30fps
Sound
3.5mm jack Yes Yes
Loudspeaker Yes Yes
  - 24-bit/192kHz audio