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General

NameXiaomi Redmi S2 (Redmi Y2)Samsung Galaxy Note21 Ultra-
ModelRedmi S2 (Redmi Y2)Galaxy Note21 Ultra-
PriceTK. 14,990Upcoming-

Network

Network TypeGSM / CDMA / HSPA / LTEGSM / CDMA / HSPA / EVDO / LTE-
Network 2GGSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 CDMA 800 & TD-SCDMA - ChinaGSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only)-
Network 3GHSDPA 850 / 900 / 1900 / 2100HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100-
Network 4GLTE band 1(2100), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 20(800), 38(2600), 40(2300)LTE-
Network SpeedHSPA, LTEHSPA 42.2/5.76 Mbps, LTE-A (7CA) Cat20 2000/200 Mbps-
Network GPRSYesYes-
Network EDGEYesYes-

Display

Display TypeIPS LCD capacitive touchscreen, 16M ColorsDynamic AMOLED 2X capacitive touchscreen-
Display Size5.99 inches, 92.6 cm2 (~74.5% screen-to-body ratio6.9 Inches-
Display Resolution720 x 1440 pixels, 18:9 ratio1440 x 3088 pixels-
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 Flash 108MP
12MP
12MP
12MP
-
Secondary Camera16 MP, HDR, LED Flash12MP -
Camera FeaturesGeo-tagging, Touch focus, Face detection, Panorama, HDRDual video call, Auto-HDR-
Video[email protected][email protected], [email protected]/60fps, [email protected]/60/240fps, [email protected], HDR10+, stereo sound rec., gyro-EIS & OIS-

Body

Body Dimensions160.7 x 77.3 x 8.1 mm (6.33 x 3.04 x 0.32 in)--
Body Weight170 g (6.00 oz)--
Body BuildFront glass, plastic bodyGlass front (Gorilla Glass Victus), glass back (Gorilla Glass Victus), stainless steel frame-
Body ColorGray, Gold, Rose GoldMystic Bronze, Mystic Black, Mystic White-

Launch

Launch AnnouncementMay, 2018Not announced-
Launch DateReleased May, 2018EXP. December 2020-

Platform

Operating SystemAndroid 8.1 (Oreo)Android 10, One UI 2.1-
CPUOcta-core 2.0 GHz Cortex-A53Octa-core (2x2.73 GHz Mongoose M5 & 2x2.50 GHz Cortex-A76 & 4x2.0 GHz Cortex-A55) - Global, Octa-core (1x3.0 GHz Kryo 585 & 3x2.42 GHz Kryo 585 & 4x1.8 GHz Kryo 585) - USA-
GPUAdreno 506Mali-G78 MP12 - Global, Adreno 660 - USA-
ChipsetQualcomm MSM8953 Snapdragon 625Exynos 1000 (7 nm+) - Global, Qualcomm SM8350 Snapdragon 875+ (7 nm+) - USA-

Memory

Memory Internal32 GB, 64 GB 256GB, 512GB-
Memory ExternalmicroSD, up to 256 GB (dedicated slot)microSDXC (uses shared SIM slot)-
Ram3 GB, 4 GB 8GB, 12GB -

Battery

Battery TypeNon-removable Li-Po BatteryLi-Poly (Lithium Polymer)-
Battery Capacity3080 mAh 4700 mah-

Multimedia

Fm RadioYesYes-

Sound

AudioVibration, MP3, WAV RingtonesYes-
LoudspeakerYesYes-
3.5mm JackYes - Active noise cancellation with dedicated micYes-

Connectivity

WiFiWi-Fi 802.11 b/g/n, WiFi Direct, HotspotWi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct, hotspot-
Bluetooth4.2, A2DP, LE5.0, A2DP, LE, aptX-
USBmicroUSB 2.03.2, Type-C 1.0 reversible connector, USB On-The-Go-
GPSYes, with A-GPS, GLONASS, BDSYes, with A-GPS, GLONASS, BDS, GALILEO-

Features

SensorsFingerprint-rear-mounted, accelerometer, gyro, proximity, compass--
MessagingSMS(threaded view), MMS, Email, Push Email, IMSMS(threaded view), MMS, Email, Push Email, IM-
BrowserHTML5HTML5-
JavaNoNo-

Other

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