Vivo X21i was officially announced in May 2018, Device released in May 2018

Mobile Network Support and Band

Vivo X21i have Hybrid Dual Sim, (Nano Sim) Card Slots,Vivo X21i support dual mode based on GSM/CDMA based network providers. Vivo X21i mobile device support GSM 2G Band Frequency at GSM 850,GSM 900,GSM 1800,GSM 1900, Vivo X21i mobile device support CDMA 2G Band Frequency at CDMA 800and Hight Speed 3G Network Band at HSDPA 850,HSDPA 900,HSDPA 1900,HSDPA 2100,3G for CDMA supports at CDMA 800,Vivo X21i also support LTE based 4G Networks Support at Frequency level LTE 2100,LTE 1800,LTE 2600,LTE 850,LTE 1700,LTE 900,LTE 1900,LTE 2300,LTE 2500, (With 4G+),comes with network handling support with Network settings and work offline with flight Mode.

Device Body Design and Display

Vivo X21i is a Phablet device and it have device dimension with 154 x 77 x 7 mm, Exactly 154.4 x 74.98 x 6.99 mm. Phone weight including the Battery 159g. Phone gave a dedicated Volume,Power,Fingerprint Key. Vivo X21i display enhanced with Super AMOLED capacitive touchscreen, (Eye Care Mode, Top Notch Display) capable to display 16.7M Colors at ~402 ppi Pixel Density . Display Resolution of this phone is 2280 x 1080 pixels compact with the 6.28 Inch display with Mode.Device has Loudspeaker to amplify music playback and tones,

Device Hardware and Operating System

Vivo X21i equipped for Android 8.1 (Oreo), (Funtouch OS 4) Operating System, Device hardware empoweredby Mediatek Helio P60, (AI Chipset) Chipsetand Octa Core Processor Processor handle manipulate tasks,at the speed of 2 GHz.device have 4 GB,6 GB RAM.Vivo X21i have internal storage 64 GB,128 GB.memory can upgrade Up to 256 GB with MicroSD, (Uses Sim 2 Slot).Vivo X21i have 12 MP Dual Camera Cameraand there is no Camera Flashand 24MP, MP Secondary front Camera.

Device Photography and Video

Vivo X21i 12 MP and Photo output come at 12 MP, (F1.8 Aperture) + 5 MP (F2.4 Aperture) Resolution in size Dual Camera camera help us to catch our favorite movements at Photographs and Videos HD Quality.Photo as includes date tagging and GPS based Geo Tagging.VideoVideo Recording at 1080p 30 FPS, (Slow Motion Video)quality.  Camera has powerful Digital Zoom digital zoom help us to focus objects very clear. Autofocus,Touch focus,Face Detection,Image Stabilization (OIS),Smile detection,Video Stabilization (EIS),HDR,Face Beauty,Voice Capture,Gesture Shot,PDAF Sensor,Low Light Mode,Bokeh / Portrait Mode,Time Lapse,AI Beautify, Full Pixel Dual Core Focus,Ultra HD Photos,Rubik's Cube Image Technology,AR Lens features also help us to take more precious photos for our daily use.Camera has powerful digital zoom help us to focus objects very clear. Vivo X21i have secondary front camera and takes high quality photos as well Enhanced Camera features like TV Output helps to connect our device directly through LED, LCD TV through Vivo X21i.Vivo X21i have Sweep Panorama to take pictures around you.

Memory and Entertainment Features

Vivo X21i Supports major auto Formats WAV, AAC, AMR, MP3, WMA, MIDI, FLAC, APE, OGG, AAC+, eAAC+ and video Formats 3GP, MP4, FLV, WMV, xVID, AVI, MOV, MKV, H.264, H.265, device haveMini headphone headphone jackVivo X21i have internal storage 64 GB,128 GB help to storage enough data of music and video files.expendable memory can upgrade Up to 256 GB with MicroSD, (Uses Sim 2 Slot) Memory Card.Vivo X21i supports Stereo FM Radio along with FM Recording feature.Device have the power to playback musics Up to 22 Hrs through standard Media Player.able to play videos Up to 7 Hrs

Internet and Data Communication

Vivo X21i Supports 2G Transfersand 3G TransfersData Transfer with GPRS and with EDGE.Data communication speed through HSPA plus, LTE,Data connection also through Wi-Fi 802.11 a/b/g/n/ac, WiFi Direct,.Wi-Fi supports dual band Hotspot support to share internet connection through Vivo X21i. Device support to browse web pages through with Google Chrome Browser, which supports you to browse web pages.browser also supports Adobe Flash .
Personal data transfers through Bluetooth 5.0 Device comes with which helps to view mapsand locate our location through GPS Tracking help us for Navigation or Direction . Device supports messaging features SMS,MMS,Email,Push Mail,IM,Hangouts.