Product
Xiaomi Redmi Note 4G
Xiaomi Redmi Note 4G
Xiaomi Redmi S2 (Redmi Y2)
Xiaomi Redmi S2 (Redmi Y2)
Battery
Charging - 10W wired
Music play Up to 60 h -
Stand-by Up to 775 h (3G) -
Talk time Up to 38 h (3G) -
Type Li-Po 3100 mAh, removable Li-Po 3080 mAh, non-removable
Body
Build - Glass front, plastic back, plastic frame
Dimensions 154 x 78.7 x 9.5 mm (6.06 x 3.10 x 0.37 in) 160.7 x 77.3 x 8.1 mm (6.33 x 3.04 x 0.32 in)
SIM Mini-SIM Nano-SIM + Nano-SIM
Weight 185 g (6.53 oz) 170 g (6.00 oz)
Comms
Bluetooth 4.0, A2DP, LE 4.2, A2DP, LE
Infrared port - Yes
NFC No No
Positioning 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, hotspot Wi-Fi 802.11 b/g/n, Wi-Fi Direct
Display
Resolution 720 x 1280 pixels, 16:9 ratio (~267 ppi density) 720 x 1440 pixels, 18:9 ratio (~269 ppi density)
Size 5.5 inches, 83.4 cm2 (~68.8% 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 2014, August. Released 2014, August 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 LED flash, panorama, HDR
Single 13 MP, f/2.2, 28mm (wide), AF -
Video 1080p@30fps 1080p@30fps (gyro-EIS)
Memory
Card slot microSDXC (dedicated slot) microSDXC (dedicated slot)
Internal 8GB 2GB RAM 32GB 3GB RAM, 64GB 4GB RAM
  eMMC 4.5 eMMC 5.1
Misc
Colors Black/White Gray, Gold, Rose Gold, Mesmerising Blue, Stunning Black
Models - M1803E6G, M1803E6H, M1803E6I
SAR - 0.43 W/kg (head)     1.58 W/kg (body)    
Network
2G bands GSM 900 / 1800 - India GSM 850 / 900 / 1800 / 1900
3G bands HSDPA 900 / 2100 - India HSDPA 850 / 900 / 1900 / 2100
4G bands 3, 40 - India 1, 3, 4, 5, 7, 8, 20, 38, 40 - Global
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 / LTE
  1, 2, 3, 4, 7 - Malaysia, Singapore 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 92h
Camera - 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 MSM8928 Snapdragon 400 (28 nm) Qualcomm MSM8953 Snapdragon 625 (14 nm)
CPU Quad-core 1.6 GHz Cortex-A7 Octa-core 2.0 GHz Cortex-A53
GPU Adreno 305 Adreno 506
OS Android 4.2 (Jelly Bean), upgradable to 4.4.2 (KitKat), MIUI 5 Android 8.1 (Oreo), upgradable to Android 9, MIUI 12
Selfie camera
Features - HDR, LED flash
Single 5 MP 16 MP, f/2.5, (wide), 1/3.06" 1.0µm
Video 720p 1080p@30fps
Sound
3.5mm jack Yes Yes
Loudspeaker Yes Yes