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General

NameVivo X21iInfinix Smart 4 Plus-
ModelX21iSmart 4 Plus-
Price-Tk 10,000-

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-
Network 3GHSDPA 850 / 900 / 2100HSDPA 850 / 900 / 1800 / 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 band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 20(800), 28(700), 40(2300)-
Network SpeedHSPA, LTEHSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps-
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 ratio6.52 inches, 96.7 cm2 (~81.3% screen-to-body ratio)-
Display Resolution1080 x 2280 pixels, 19:9 ratio720 x 1520 pixels, 19.5:9 ratio (~294 ppi density)-
Display MultitouchYes - Funtouch OS 4.0Yes-
Display Density402 ppi density--

Camera

Primary Camera12MP (f/1.8, 1/2.513MP
8MP
2MP
-
Secondary Camera24MP32MP -
Camera FeaturesGeo-tagging, Touch focus, Face detection, HDR, panoramaLED flash, HDR, panorama-
Video[email protected][email protected]-

Body

Body Dimensions154.4 x 75 x 7 mm (6.08 x 2.95 x 0.28 in)--
Body Weight159 g (5.61 oz)--
Body ColorBlack, Aurora White, Ruby RedMilan Black, Ocean Wave, Purple-

Launch

Launch AnnouncementMay, 2018July, 2020-
Launch DateRelease May 19th, 2018Exp. release 2020, August-

Platform

Operating SystemAndroid 8.1 OreoAndroid 10-
CPUOcta-core (4x2.0 GHz Cortex-A73 & 4x2.0 GHz Cortex-A53)Octa-core 2.0 GHz Cortex-A53-
GPUMali-G72 MP3PowerVR GE8320-
ChipsetMediatek MT6771 Helio P60Mediatek MT6762 Helio P22 (12 nm)-

Memory

Memory Internal64GB, 128GB32GB-
Memory ExternalmicroSD, up to 256GB (uses SIM 2 slot)microSD, up to 256GB-
Ram4GB, 6GB 3GB-

Battery

Battery TypeNon-removable Li-Ion BatteryNon-removable Li-Ion-
Battery Capacity3425 mAh 4000 mAh -

Multimedia

Fm RadioYesYes-

Sound

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

Connectivity

WiFiWi-Fi 802.11 a/b/g/n/ac, dual-band, WiFi Direct, HotspotWi-Fi 802.11 a/b/g/n, Wi-Fi Direct, hotspot-
Bluetooth5.0, A2DP, LE4.2, A2DP-
USBmicroUSB 2.0, USB On-The-GomicroUSB 2.0-
GPSYes, with A-GPS, GLONASSYes, with A-GPS-

Features

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

Other

Made ByChinaChina-
Other FeaturesFast battery charging, MP4/H.264 player, MP3/WAV/eAAC+/FLAC player, Document viewer, Photo/video editorColor: Milan Black, Ocean Wave, Purple-