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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
GPRS Yes Yes
EDGE Yes Yes
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 16 GB, 2 GB RAM 64 GB, 4 GB RAM or 32 GB, 3 GB RAM or 16 GB, 2 GB 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
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