Product
Xiaomi Redmi Note 2
Xiaomi Redmi Note 2
Xiaomi Redmi Note 4X
Xiaomi Redmi Note 4X
Battery
Charging 10W wired -
Music play Up to 46 h -
Stand-by Up to 144 h (3G) -
Talk time Up to 11 h 30 min (3G) -
Type Li-Po 3060 mAh, removable Li-Po 4100 mAh, non-removable
Body
Build Glass front, plastic back, plastic frame Glass front, aluminum back, aluminum frame
Dimensions 152 x 76 x 8.3 mm (5.98 x 2.99 x 0.33 in) 151 x 76 x 8.5 mm (5.94 x 2.99 x 0.33 in)
SIM Dual SIM (Micro-SIM, dual stand-by) Nano-SIM + Micro-SIM
Weight 160 g (5.64 oz) 165 g (5.82 oz)
Comms
Bluetooth 4.0, A2DP, LE 4.2, A2DP, LE
Infrared port Yes Yes
NFC No No
Positioning GPS, GLONASS, BDS GPS, GLONASS, BDS
Radio Stereo FM radio FM radio
USB microUSB 2.0, OTG microUSB 2.0, OTG
WLAN Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot Wi-Fi 802.11 a/b/g/n, Wi-Fi Direct
Display
Resolution 1080 x 1920 pixels, 16:9 ratio (~403 ppi density) 1080 x 1920 pixels, 16:9 ratio (~401 ppi density)
Size 5.5 inches, 82.6 cm2 (~71.5% 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 2015, August. Released 2015, August 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/2.2, PDAF 13 MP, f/2.0, 1/3.1", 1.12µm, PDAF
Video 1080p@30fps 1080p@30fps, 720p@120fps
Memory
Card slot microSDXC (dedicated slot) - Chinese version only microSDXC (uses shared SIM slot)
Internal 16GB 2GB RAM (Standard), 32GB 2GB RAM (Prime) 16GB 3GB RAM, 32GB 3GB RAM, 64GB 4GB RAM
  eMMC 5.0 eMMC 5.1
Misc
Colors White, blue, yellow, pink, mint green Platinum Silver, Champagne Gold, Matte Black, Hatsune Miku, Sakura Powder
Models 2015051 -
SAR 0.34 W/kg (head)     0.45 W/kg (body)     -
Network
2G bands GSM 900 / 1800 / 1900 - SIM 1 & SIM 2 GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G bands HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 900 / 1900 / 2100
4G bands 1, 3, 7, 38, 39, 40, 41 1, 3, 5, 7, 38, 39, 40, 41 - Snapdragon model
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
  TD-SCDMA 1, 3, 5, 7, 8, 38, 39, 40, 41 - Mediatek model
Our Tests
Audio quality Noise -96.1dB / Crosstalk -94.8dB -
Battery (old) Endurance rating 49h -
Camera Photo / Video -
Display Contrast ratio: 953 (nominal), 2.166 (sunlight) -
Loudspeaker Voice 66dB / Noise 66dB / Ring 76dB -
Performance Basemark OS II 2.0: 1063Basemark X: 8518 -
Platform
Chipset Mediatek MT6795 Helio X10 (28 nm) Qualcomm MSM8953 Snapdragon 625 (14 nm)
CPU Octa-core 2.0 GHz Cortex-A53 - Redmi Note 2Octa-core 2.2 GHz Cortex-A53 - Redmi Note 2 Prime Octa-core 2.0 GHz Cortex-A53
GPU PowerVR G6200 Adreno 506
OS Android 5.0 (Lollipop), MIUI 7 Android 6.0 (Marshmallow), upgradable to 7.0 (Nougat), MIUI 10
Selfie camera
Single 5 MP, f/2.0 5 MP, f/2.0
Video 720p 1080p@30fps
Sound
3.5mm jack Yes Yes
Loudspeaker Yes Yes
  - 24-bit/192kHz audio