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General

NameVivo X21iSamsung Galaxy A8S-
ModelX21iGalaxy A8S-
Price-TK. 43,500-

Network

Network TypeGSM / CDMA / HSPA / LTEGSM / HSPA / LTE-
Network 2GGSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 CDMA 800 & TD-SCDMAGSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only)-
Network 3GHSDPA 850 / 900 / 2100HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100-
Network 4GLTE band 1(2100), 3(1800), 4(1700/2100), 5(850), 8(900), 38(2600), 39(1900), 40(2300), 41(2500)LTE-
Network SpeedHSPA, LTEHSPA, LTE-
Network GPRSYesYes-
Network EDGEYesYes-

Display

Display TypeSuper AMOLED capacitive touchscreen, 16M ColorsIPS LCD capacitive touchscreen, 16M Colors-
Display Size6.28 inches, 98.4 cm2 (~85.0% screen-to-body ratio6.4 inches, 100.5 cm2 (~84.7% screen-to-body ratio)-
Display Resolution1080 x 2280 pixels, 19:9 ratio1080 x 2340 pixels, 19.5:9 ratio-
Display MultitouchYes - Funtouch OS 4.0Yes-
Display Density402 ppi density403 ppi density-

Camera

Primary Camera12MP (f/1.8, 1/2.5Triple: 24 MP, f/1.7, PDAF 10 MP, AF 5 MP, f/2.2, depth sensor-
Secondary Camera24MP24 MP, f/2.0-
Camera FeaturesGeo-tagging, Touch focus, Face detection, HDR, panoramaLED Flash, Panorama, HDR-
Video[email protected][email protected]-

Body

Body Dimensions154.4 x 75 x 7 mm (6.08 x 2.95 x 0.28 in)158.4 x 74.9 x 7.4 mm (6.24 x 2.95 x 0.29 in)-
Body Weight159 g (5.61 oz)173 g (6.10 oz)-
Body ColorBlack, Aurora White, Ruby RedBlue, Gray, Black-
Body Build-Front/back glass, Aluminum frame-

Launch

Launch AnnouncementMay, 2018December, 2018-
Launch DateRelease May 19th, 2018Released December, 2018-

Platform

Operating SystemAndroid 8.1 OreoAndroid 9.0 (Pie)-
CPUOcta-core (4x2.0 GHz Cortex-A73 & 4x2.0 GHz Cortex-A53)Octa-core (2x2.2 GHz 360 Gold & 6x1.7 GHz Kryo 360 Silver)-
GPUMali-G72 MP3Adreno 616-
ChipsetMediatek MT6771 Helio P60Qualcomm SDM710 Snapdragon 710 (10 nm)-

Memory

Memory Internal64GB, 128GB128 GB-
Memory ExternalmicroSD, up to 256GB (uses SIM 2 slot)microSD, up to 512 GB-
Ram4GB, 6GB 6 GB, 8 GB-

Battery

Battery TypeNon-removable Li-Ion BatteryNon-removable Li-Ion Battery-
Battery Capacity3425 mAh 3400 mAh -

Multimedia

Fm RadioYesYes-

Sound

AudioVibration, MP3, WAV RingtonesVibration, MP3, WAV Ringtones-
LoudspeakerYesYes-
3.5mm JackYes - 32-bit/192kHz audio - Active noise cancellation with dedicated micNo - Active noise cancellation with dedicated mic-

Connectivity

WiFiWi-Fi 802.11 a/b/g/n/ac, dual-band, WiFi Direct, HotspotWi-Fi 802.11 a/b/g/n/ac, dual-band, WiFi Direct, Hotspot-
Bluetooth5.0, A2DP, LE5.0, A2DP, EDR, LE-
USBmicroUSB 2.0, USB On-The-Go2.0, Type-C 1.0 reversible connector-
GPSYes, with A-GPS, GLONASSYes, with A-GPS, GLONASS, BDS-

Features

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

Other

Made ByChinaKoria-
Other FeaturesFast battery charging, MP4/H.264 player, MP3/WAV/eAAC+/FLAC player, Document viewer, Photo/video editorFast battery charging, ANT+ support MP4/WMV/H.265 player MP3/WAV/WMA/eAAC+/FLAC player, Photo/video editor Document viewer-