Xiaomi Redmi 4 (4X)
Network Technology GSM / HSPA / LTE
2G bands GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G bands HSDPA 850 / 900 / 1900 / 2100
4G bands LTE band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 38(2600), 39(1900), 40(2300), 41(2500)
Speed HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat6 300/100 Mbps
GPRS Yes
EDGE Yes
Launch Announced 2017, May
Status Available. Released 2017, May
Body Dimensions 139.2 x 70 x 8.7 mm (5.48 x 2.76 x 0.34 in)
Weight 150 g (5.29 oz)
Build Front glass, aluminum body
SIM Hybrid Dual SIM (Nano-SIM/ Micro-SIM, dual stand-by)
Display Type IPS LCD capacitive touchscreen, 16M colors
Size 5.0 inches, 68.9 cm2 (~70.7% screen-to-body ratio)
Resolution 720 x 1280 pixels, 16:9 ratio (~294 ppi density)
Multitouch Yes
Protection Corning Gorilla Glass (unspecified version)
 - MIUI 8.0, 9.1
Platform OS Android 6.0.1 (Marshmallow), upgradable to 7.1.2 (Nougat)
Chipset Qualcomm MSM8940 Snapdragon 435
CPU Octa-core 1.4 GHz Cortex-A53
GPU Adreno 505
Memory Card slot microSD, up to 128 GB (uses SIM 2 slot)
Internal 64 GB, 4 GB RAM or 32 GB, 3 GB RAM or 16 GB, 2 GB RAM
Main Camera Single 13 MP, PDAF, f/2.0
Features LED flash, HDR, panorama
Video 1080p@30fps
Selfie camera Single 5 MP, f/2.2
Video 1080p@30fps
Sound Alert types Vibration; MP3, WAV ringtones
Loudspeaker Yes
3.5mm jack Yes
 - Active noise cancellation with dedicated mic
Comms WLAN Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot
Bluetooth 4.2, A2DP, LE
GPS Yes, with A-GPS, GLONASS, BDS
Infrared port Yes
Radio FM radio
USB microUSB 2.0
Features Sensors Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass
Messaging SMS(threaded view), MMS, Email, Push Email, IM
Browser HTML5
 - DivX/Xvid/MP4/H.265 player
- MP3/WAV/eAAC+/FLAC player
- Photo/video editor
- Document viewer
Battery   Non-removable Li-Po 4100 mAh battery
Stand-by Up to 432 h (3G)
Talk time Up to 36 h (3G)
Music play Up to 87 h
Misc Colors Black, Gold
Price About 110 EUR
Tests Performance Basemark OS II: 946 / Basemark OS II 2.0: 832
Basemark X: 7608
Display Contrast ratio: 915 (nominal), 2.920 (sunlight)
Camera Photo / Video
Loudspeaker Voice 64dB / Noise 70dB / Ring 72dB
Audio quality Noise -94.3dB / Crosstalk -94dB
Battery life

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