Oppo A21

Oppo A21
Alt. Price: ₹ 14,000
Brand: Oppo
Category: Mobiles
  • Display 5.7 inches
  • Processor Helio P23
  • Front Camera 8 MP
  • Rear Camera Dual: 16 MP/ 5MP
  • Battery Li-Ion 4000mAh

Oppo A21 Price, Specs and Features

Oppo A21 smartphone display flaunts 5.7 inches S-IPS LCD capacitive touchscreen with a 720 pixels X 1440 pixels resolution. Also, the pixel density is ~282 PPI. It is however powered by a Li-Ion 4000mAh non-removable battery.

The Oppo A21 smartphone has different color variations of Deep sea blue, Cherry red, Pearl white. The device also comes with a Dual SIM (Nano-SIM, dual stand-by).

Oppo A21 camera comes with a Dual 16 & 5-megapixel main camera. Also, the device’s front-facing camera also has a selfie camera of 8 megapixels.

The operating system runs on Android 10. The Smartphone OppoA21 works on Mediatek MT6763T Helio P23 (16 nm). The CPU is an Octa-core 2.5 GHz Cortex-A53. Also, the graphic processor is Mali-G71 MP1. The phone of oppo a21 memory comes with 128GB of internal storage. The device runs on 6GB or 8GB RAM.

The connectivity of Oppo A21 also includes Wi-Fi 802.11 a/b/g/n/ac, USB OTG, GPS. Sensors on the phone include a proximity sensor, accelerometer, fingerprint sensor.

Oppo A21

Oppo A21 Additional Information

Oppo A21 MT6763T Helio P23: an 8-core chipset that was announced on August 28, 2017, and is manufactured using a 16-nanometer process technology. It has 4 cores Cortex-A53 at 1650 MHz and 4 cores Cortex-A53 at 2300 MHz. The Mediatek Helio P23 MT6763T is a mainstream ARM SoC for smartphones (mainly Android-based) that was introduced in 2017. It is manufactured in a 16 nm FinFET+ process and is equipped with 8 ARM Cortex-A53 CPU cores. The cores are divided in two clusters, a performance cluster clocked at up to 2.3 GHz (2.5 GHz for a single core only) and a power efficiency cluster clocked at up to 1.65 GHz. The chip also includes an LTE modem (Cat. 7 DL / Cat. 13 UL with Dual-SIM support) and a 802.11a/b/g/n WiFi modem. The integrated ARM Mali-G71 MP2 GPU is clocked at up to 770 MHz and has two clusters (from 32). The integrated memory controller supports DDR4x (Dual-Channel?) at 1500 MHz and LPDDR3 (Single Channel only) at 933 MHz. The video engine supports H.264 de- and encoding but only decoding (playback) of H.265/HEVC.

Oppo A21 Android 10: Android 10 (codenamed Android Q during development) is the tenth major release and the 17th version of the Android mobile operating system. It was first released as a developer preview on March 13, 2019, and was released publicly on September 3, 2019. Android 10 was officially released on September 3, 2019, for supported Google Pixel devices, as well as the third-party Essential Phone and Redmi K20 Pro in selected markets. The OnePlus 7T was the first device with Android 10 pre-installed. In October 2019, it was reported that Google’s certification requirements for Google Mobile Services will only allow Android 10-based builds to be approved after January 31, 2020.

As of November 2021, 27.71% of Android devices run Android 10 (API 29), making it the second most used version of Android. Android 10 introduces a revamped full-screen gesture navigation system and new app open and close animations, with gestures such as swiping from either side edge of the display to go back, swiping up to go to the home screen, swiping up and holding to access Overview, swiping diagonally from a bottom corner of the screen to activate the Google Assistant, and swiping along the gesture bar at the bottom of the screen to switch apps. The use of an edge swiping gesture as a “Back” command was noted as potentially causing conflicts with apps that utilize sidebar menus and other functions accessible by swiping. An API can be used by apps to opt out of handling a back gesture within specific areas of the screen, a sensitivity control was added for adjusting the size of the target area to activate the gesture, and Google later stated that the drawer widget would support being “peeked” by long-pressing near the edge of the screen, and then swiped open. The traditional three-key navigation system used since Android “Honeycomb” remains supported as an option, along with the two-button “pill” style navigation introduced in Android 9.0 Pie.

Oppo A21 Specs


Announced 2020
Status Exp 2020, December


Dimensions -
Body Front glass, aluminum body
Weight -
Colors Deep sea blue, Cherry red, Pearl white


Selfie Camera 8 MP, f/2.2

Selfie Camera Features Panorama, HDR
Selfie Video Resolution [email protected]
Main Camera Dual:

Main Camera Features LED flash, panorama, HDR
Video Resolution [email protected]


Screen Type S-IPS LCD capacitive touchscreen, 16M colors
Screen Size 5.7 inches

Screen Resolution 720 x 1440 pixels
Pixel Density 282 ppi
Screen Protection Corning Gorilla Glass 3

Touch Screen Multiple touch


Operating System Android 10

Chipset Mediatek MT6763T Helio P23 (16 nm)

CPU Octa-core 2.5 GHz Cortex-A53

GPU Mali-G71 MP1


Internal Storage 128GB
Card Slot microSD, up to 256 GB (dedicated slot)


Network GSM / HSPA / LTE
2G Bands GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2

3G Bands HSDPA 850 / 900 / 1900 / 2100

4G Bands LTE band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)

Speed HSPA 42.2/5.76 Mbps, LTE
SIM Dual SIM (Nano-SIM, dual –stand-by)

Bluetooth 4.2, A2DP, LE, aptX HD
USB microUSB 2.0, USB On-The-Go
GPS Yes, with A-GPS
WLAN Wi-Fi 802.11 a/b/g/n, Wi-Fi Direct, hotspot


Loudspeaker Yes
Earphone Jack Yes, 3.5mm Audio Jeck
Sound Enhancements Cancelled Noice
View More


Battery Li-Ion 4000mAh, Non-Removable


Sensors Fingerprint, Accelerometer, proximity, compass

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