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vivo Y51

Xiaomi Redmi 4 (4X)

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vivo Y51
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vivo Y51

Xiaomi Redmi 4 (4X)

Network
Technology GSM / HSPA / LTE GSM / HSPA / LTE
2G bands GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G Network HSDPA 850 / 900 / 2100 HSDPA 850 / 900 / 1900 / 2100
4G Network LTE 850 / 900 / 1800 / 2100 / 2600 - Malaysia LTE band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 38(2600), 39(1900), 40(2300), 41(2500)
  LTE 900 / 1800 / 2100 - Thailand, Indonesia
Speed HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat6 300/100 Mbps
Launch
Announced 2015, December 2017, May
Status Available. Released 2015, December Available. Released 2017, May
Body
Dimensions 143.8 x 71.7 x 7.5 mm (5.66 x 2.82 x 0.30 in) 139.2 x 70 x 8.7 mm (5.48 x 2.76 x 0.34 in)
Weight 157 g (5.54 oz) 150 g (5.29 oz)
Build Front glass, aluminum body
SIM Dual SIM Hybrid Dual SIM (Nano-SIM/ Micro-SIM, dual stand-by)
Display
Type IPS LCD capacitive touchscreen, 16M colors IPS LCD capacitive touchscreen, 16M colors
Size 5.0 inches, 68.9 cm2 (~66.8% screen-to-body ratio) 5.0 inches, 68.9 cm2 (~70.7% screen-to-body ratio)
Resolution 540 x 960 pixels, 16:9 ratio (~220 ppi density) 720 x 1280 pixels, 16:9 ratio (~294 ppi density)
Protection Corning Gorilla Glass (unspecified version)
Platform
OS Android 5.0.2 (Lollipop); Funtouch 2.5 Android 6.0.1 (Marshmallow), upgradable to 7.1.2 (Nougat); MIUI 10
Chipset Qualcomm MSM8916 Snapdragon 410 (28 nm) Qualcomm MSM8940 Snapdragon 435 (28 nm)
CPU Quad-core 1.2 GHz Cortex-A53 Octa-core 1.4 GHz Cortex-A53
GPU Adreno 306 Adreno 505
Memory
Card slot microSD, up to 256 GB (dedicated slot) microSD, up to 128 GB (uses shared SIM slot)
Internal 16GB 2GB RAM 16GB 2GB RAM, 32GB 3GB RAM, 64GB 4GB RAM
Main Camera
Modules 8 MP, AF 13 MP, f/2.0, PDAF
Features LED flash, HDR, panorama LED flash, HDR, panorama
Video 1080p@30fps 1080p@30fps
Selfie Camera
Modules 5 MP 5 MP, f/2.2
Video 1080p@30fps
Sound
Loudspeaker Yes Yes
3.5mm jack Yes Yes
  Active noise cancellation with dedicated mic
Comms
WLAN Wi-Fi 802.11 b/g/n, hotspot Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot
Bluetooth 4.0, A2DP 4.2, A2DP, LE
GPS Yes, with A-GPS, GLONASS, BDS Yes, with A-GPS, GLONASS, BDS
Infrared port No Yes
Radio FM radio FM radio
USB microUSB 2.0 microUSB 2.0
Features
Sensors Accelerometer, proximity, compass Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass
Battery
  Non-removable Li-Ion 2350 mAh 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 White Black, Gold
SAR 0.77 W/kg (head)     0.83 W/kg (body)    
Price About 130 EUR 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)
Loudspeaker Voice 64dB, noise 70dB, ring 72dB
Audio quality Noise -94.3dB / Crosstalk -94dB
Battery life Endurance rating 80h

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