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General

NameXiaomi Redmi S2 (Redmi Y2)Vivo Y51 -
ModelRedmi S2 (Redmi Y2)Y51 -
PriceTK. 14,990Upcoming-

Network

Network TypeGSM / CDMA / HSPA / LTE GSM / HSPA / LTE -
Network 2GGSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 CDMA 800 & TD-SCDMA - China GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 -
Network 3GHSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 900 / 2100 -
Network 4GLTE band 1(2100), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 20(800), 38(2600), 40(2300) 1, 3, 5, 8, 40 -
Network SpeedHSPA, LTE--
Network GPRSYesYes-
Network EDGEYesYes-

Display

Display TypeIPS LCD capacitive touchscreen, 16M Colors Super AMOLED capacitive touchscreen -
Display Size5.99 inches, 92.6 cm2 (~74.5% screen-to-body ratio 6.38 inches, 99.9 cm2 -
Display Resolution720 x 1440 pixels, 18:9 ratio 1080 x 2340 pixels, 19.5:9 ratio -
Display MultitouchYes - MIUI 9.5Yes-
Display Density269 ppi density--

Camera

Primary CameraDual: 12 MP (f/2.2, 1.25μm, PDAF) + 5 MP, gyro-EIS, phase detection autofocus, LED Flash48MP
8MP
2MP
2MP
-
Secondary Camera16 MP, HDR, LED Flash16MP, f/2.0, (wide), 1/3.06-
Camera FeaturesGeo-tagging, Touch focus, Face detection, Panorama, HDR HDR, panorama -
Video[email protected] 1080p @30fps, 1920×1080 pixels -

Body

Body Dimensions160.7 x 77.3 x 8.1 mm (6.33 x 3.04 x 0.32 in) 159.3 x 75.2 x 8.7 mm (6.27 x 2.96 x 0.34 in) -
Body Weight170 g (6.00 oz) 186.7 g (6.60 oz) -
Body BuildFront glass, plastic body--
Body ColorGray, Gold, Rose Gold Mystic Black, Jazzy Blue, Dreamy White -

Launch

Launch AnnouncementMay, 2018 15 September, 2020 -
Launch DateReleased May, 2018 19 September, 2020 -

Platform

Operating SystemAndroid 8.1 (Oreo) Android 10, Funtouch 10 -
CPUOcta-core 2.0 GHz Cortex-A53 Octa-core (4x2.0 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver) -
GPUAdreno 506 Adreno 610 -
ChipsetQualcomm MSM8953 Snapdragon 625 Qualcomm SDM665 Snapdragon 665 (11 nm) -

Memory

Memory Internal32 GB, 64 GB128GB -
Memory ExternalmicroSD, up to 256 GB (dedicated slot) microSDXC (uses shared SIM slot) -
Ram3 GB, 4 GB 4GB -

Battery

Battery TypeNon-removable Li-Po Battery Li-Poly (Lithium Polymer) -
Battery Capacity3080 mAh 4500 mAh -
Charging- Fast battery charging 18W -

Multimedia

Fm RadioYesYes-

Sound

AudioVibration, MP3, WAV Ringtones Vibration, MP3, WAV ringtones -
LoudspeakerYesYes-
3.5mm JackYes - Active noise cancellation with dedicated micYes-

Connectivity

WiFiWi-Fi 802.11 b/g/n, WiFi Direct, Hotspot Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot -
Bluetooth4.2, A2DP, LE 5.0, A2DP, LE -
USBmicroUSB 2.0 2.0, Type-C 1.0 reversible connector, USB On-The-Go -
GPSYes, with A-GPS, GLONASS, BDS Yes, with A-GPS, GLONASS, GALILEO, BDS -

Features

SensorsFingerprint-rear-mounted, accelerometer, gyro, proximity, compass Fingerprint (under display, optical), accelerometer, gyro, proximity, compass -
MessagingSMS(threaded view), MMS, Email, Push Email, IM SMS(threaded view), MMS, Email, IM -
BrowserHTML5 HTML5 -
JavaNoNo-

Other

Made ByChinaChina-
Other FeaturesMP4/H.265 player, MP3/WAV/eAAC+/FLAC player, Photo/video editor Document viewer 5V/2A 10W charging Fingerprint Sensor Position: under display-