Product
Xiaomi Redmi 3
Xiaomi Redmi 3
Xiaomi Redmi S2 (Redmi Y2)
Xiaomi Redmi S2 (Redmi Y2)
Battery
Charging 10W wired 10W wired
Type Li-Ion 4100 mAh, non-removable Li-Po 3080 mAh, non-removable
Body
Build Glass front, aluminum back, aluminum frame Glass front, plastic back, plastic frame
Dimensions 139.3 x 69.6 x 8.5 mm (5.48 x 2.74 x 0.33 in) 160.7 x 77.3 x 8.1 mm (6.33 x 3.04 x 0.32 in)
SIM Nano-SIM + Micro-SIM Nano-SIM + Nano-SIM
Weight 144 g (5.08 oz) 170 g (6.00 oz)
Comms
Bluetooth 4.1, A2DP 4.2, A2DP, LE
Infrared port Yes Yes
NFC No No
Positioning GPS, GLONASS, BDS
Radio FM radio FM radio
USB microUSB 2.0 microUSB 2.0
WLAN Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot Wi-Fi 802.11 b/g/n, Wi-Fi Direct
Display
Resolution 720 x 1280 pixels, 16:9 ratio (~294 ppi density) 720 x 1440 pixels, 18:9 ratio (~269 ppi density)
Size 5.0 inches, 68.9 cm2 (~71.1% screen-to-body ratio) 5.99 inches, 92.6 cm2 (~74.5% 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, January. Released 2016, January 2018, May. Released 2018, May
Status Discontinued Discontinued
Main Camera
Dual - 12 MP, f/2.2, 1.25μm, PDAF 5 MP, f/2.4, (depth)
Features LED flash, HDR, panorama LED flash, panorama, HDR
Single 13 MP, f/2.0, PDAF -
Video 1080p@30fps 1080p@30fps (gyro-EIS)
Memory
Card slot microSDXC (uses shared SIM slot) microSDXC (dedicated slot)
Internal 16GB 2GB RAM, 32GB 3GB RAM 32GB 3GB RAM, 64GB 4GB RAM
  eMMC 4.5 eMMC 5.1
Misc
Colors Gold, Dark Gray, Silver, Classic Gold Gray, Gold, Rose Gold, Mesmerising Blue, Stunning Black
Models 2015816 M1803E6G, M1803E6H, M1803E6I
SAR 0.90 W/kg (head)     0.56 W/kg (body)     0.43 W/kg (head)     1.58 W/kg (body)    
SAR EU 1.33 W/kg (head)     -
Network
2G bands GSM 900 / 1800 / 1900 - SIM 1 & SIM 2 GSM 850 / 900 / 1800 / 1900
3G bands HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 900 / 1900 / 2100
4G bands 1, 3, 7, 38, 39, 40, 41 1, 3, 4, 5, 7, 8, 20, 38, 40 - Global
Speed HSPA, LTE, EV-DO Rev.A 3.1 Mbps HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps
Technology GSM / CDMA / HSPA / EVDO / LTE GSM / CDMA / HSPA / LTE
  CDMA2000 1xEV-DO 1, 3, 5, 7, 8, 34, 38, 39, 40, 41 - China
Our Tests
Audio quality - Noise -90.3dB / Crosstalk -93.1dB
Battery (old) Endurance rating 107h Endurance rating 92h
Camera Photo / Video Photo / Video
Display - Contrast ratio: 1072:1 (nominal), 3.077 (sunlight)
Loudspeaker - Voice 68dB / Noise 69dB / Ring 82dB
Performance - AnTuTu: 77488 (v7) GeekBench: 4313 (v4.4) GFXBench: 7.4fps (ES 3.1 onscreen)
Platform
Chipset Qualcomm MSM8939v2 Snapdragon 616 (28 nm) Qualcomm MSM8953 Snapdragon 625 (14 nm)
CPU Octa-core (4x1.5 GHz Cortex-A53 & 4x1.2 GHz Cortex-A53) Octa-core 2.0 GHz Cortex-A53
GPU Adreno 405 Adreno 506
OS Android 5.1 (Lollipop), MIUI 7 Android 8.1 (Oreo), upgradable to Android 9, MIUI 12
Selfie camera
Features - HDR, LED flash
Single 5 MP, f/2.2 16 MP, f/2.5, (wide), 1/3.06" 1.0µm
Video 1080p@30fps 1080p@30fps
Sound
3.5mm jack Yes Yes
Loudspeaker Yes Yes