vivo X21 vs Xiaomi Mi A2 (Mi 6X)

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Comparing the vivo X21 vs Xiaomi Mi A2 (Mi 6X) across performance, display, camera, battery, storage, expert reviews and user rating to help determine the better smartphone.

Here is the summary of the results:

Performance: Both vivo X21 and Xiaomi Mi A2 (Mi 6X) run at the same processing speed of 2.2 GHz.


Display: vivo X21 offers a screen size of 6.28 inches, while Xiaomi Mi A2 (Mi 6X) offers 5.99 inches, making vivo X21 the larger display of the two. vivo X21 features a Super AMOLED display compared to Xiaomi Mi A2 (Mi 6X)'s IPS LCD, making vivo X21 the better display of the two.


Rear Camera: Both vivo X21 and Xiaomi Mi A2 (Mi 6X) feature a 12 MP primary rear camera.


Front Camera: Xiaomi Mi A2 (Mi 6X) offers a higher front camera resolution with 20 MP, while vivo X21 offers 12 MP, making Xiaomi Mi A2 (Mi 6X) better for front camera photography.


Battery: vivo X21 offers a higher battery capacity with 3200 mAh, while Xiaomi Mi A2 (Mi 6X) offers 3010 mAh, making vivo X21 better for longer battery life.


Storage: Xiaomi Mi A2 (Mi 6X) offers higher internal storage with 64 GB, while vivo X21 offers 128 GB, making Xiaomi Mi A2 (Mi 6X) the better option for storage.


Expert Review: Xiaomi Mi A2 (Mi 6X) receives a higher expert rating of 8 from the editorial team, while vivo X21 is rated 7.


User Rating: vivo X21 receives a higher user rating of 4.2, while Xiaomi Mi A2 (Mi 6X) has a rating of 4.1.

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vivo X21
₹36,990
(Out of Stock)
Xiaomi Mi A2 (Mi 6X)
₹8,399
(Out of Stock)
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Summary

Release Date

29 May, 2018
16 Aug, 2018
06 May, 2026

Performance

Snapdragon 660
Snapdragon 660
Snapdragon 8 Gen 5
Octa Core (upto 2.2 GHz)
Octa Core (upto 2.2 GHz)
Octa Core (upto 3.8 GHz)
6 GB RAM
4 GB RAM
12 GB RAM

Display

6.28 inches (15.95 cm)
5.99 inches (15.21 cm)
6.31 inches (16.03 cm)
Super AMOLED
IPS LCD
AMOLED
1080x2280 px (FHD+)
1080x2160 px (FHD+)
1216x2640 px (FHD+)
N/A
N/A
120 Hz Refresh Rate

Rear Camera

12 MP
Primary Camera
12 MP
Primary Camera
50 MP
Primary Camera
5 MP
Depth Camera
20 MP
Camera
50 MP
Telephoto Camera (upto 3x Optical Zoom)
N/A
N/A
8 MP
Ultra-Wide Angle Camera

Front Camera

12 MP
20 MP
50 MP

Battery

3200 mAh
3010 mAh
6500 mAh
Fast Charging
Quick Charging
90W Flash Charging
N/A
No Wireless Charging
Wireless Charging

Storage

128 GB
64 GB
256 GB
N/A
eMMC 5.1
UFS 4.1

Expert Review

7.0/10
8.0/10
8.4/10

Pros

  • Sleek build
  • Superb display with an under-screen FPS
  • Great cameras
  • Solid battery life
  • Excellent cameras
  • Solid performer
  • Assured Android updates for the next two years
  • Compact, premium design
  • Excellent battery life
  • Reliable performance
  • Strong portrait photography

Cons

  • Performance can’t match to the competition
  • Micro-USB charging port and no fast charging
  • Priced steeply
  • No headphone jack
  • Battery life is average
  • Pronounced camera bump
  • Video recording inconsistencies
  • Colours can be slightly oversaturated

User Ratings

4.2/5
(2,008 ratings)
4.1/5
(81,165 ratings)
4.5/5
(140 ratings)

Benchmarks (The higher, the better)

N/A
N/A
3,000,897
AnTuTu Score
N/A
N/A
16h 04m
Battery Life (PC Mark)

Compare Prices

Not Available in any store
Not Available in any store
₹79,999

Video

Videos
3 More Videos
Videos
12 More Videos
There are no videos available for the device.

User Feedback

General

Launch Date

May 29, 2018
(Official)
Aug 16, 2018
(Official)
May 06, 2026
(Official)

Operating System

Android v8.1 (Oreo)
Android v8.1 (Oreo)
Android v16

OS Updates

N/A
N/A
5 Year

Security Updates

N/A
N/A
7 Year

Custom UI

Funtouch OS
Android One
Origin OS

Performance

Performance Rating

Good
Good
Excellent

Chipset

Qualcomm Snapdragon 660
Qualcomm Snapdragon 660
Qualcomm Snapdragon 8 Gen 5 SM8845

Processor

Octa core

2.2 GHz, Quad core, Kryo 260 1.84 GHz, Quad core, Kryo 260
Octa core

2.2 GHz, Quad core, Kryo 260 1.84 GHz, Quad core, Kryo 260
Octa core

3.8 GHz, Dual core, Oryon V3 Phoenix L 3.32 GHz, Hexa Core, Oryon V3 Phoenix M

Architecture (The higher, the better)

64 bit
64 bit
64 bit

Fabrication (The lower, the better)

N/A
14 nm
3 nm

Graphics (GPU)

Adreno 512
Adreno 512
Adreno 829

RAM

6 GB
4 GB / 6 GB
12 GB

RAM Type

N/A
LPDDR4X
LPDDR5X Ultra

Performance Test Results

AnTuTu Score (The higher, the better) AnTuTu benchmark measures overall performance of a phone by stress-testing CPU, GPU, RAM, etc.

N/A
N/A
3,000,897

Bootup Time (The lower, the better)

N/A
N/A
14.0 s

Gaming Test Results

Wild Life Extreme (The higher, the better) Wild Life Extreme is a classic mobile benchmark; it renders in 4K to test the peak performance of a wide range of devices.

N/A
N/A
4,004

Battery Drain* (The lower, the better)

N/A
N/A
5.0 %

Heating* (The lower, the better)

N/A
N/A
17.4 %
* after 30 mins of gaming

Display

Display Rating

Best In Class
Excellent
Best In Class

Display Type

Super AMOLED
IPS LCD
AMOLED

Screen Size

6.28 inches  (15.95 cm)
5.99 inches  (15.21 cm)
6.31 inches  (16.03 cm)

Resolution

1080x2280 px (FHD+)
1080x2160 px (FHD+)
1216x2640 px (FHD+)

Peak Brightness

N/A
N/A
5000 nits

Refresh Rate

N/A
N/A
120 Hz

Aspect Ratio

19:9
18:9
19.5:9

Pixel Density

402 ppi
403 ppi
460 ppi

Screen to Body Ratio (calculated)

84.93 %
77.38 %
90.11 %

Screen Protection

Corning Gorilla Glass v3
Corning Gorilla Glass v5
Yes

Bezel-less Display

N/A
Yes
Yes with punch-hole display

HDR 10 / HDR+ Support

N/A
N/A
Yes HDR 10+

Screen to Body Ratio (claimed by the brand)

N/A
N/A
94.38 %

Design

Height

154.4 mm
158.7 mm
150.83 mm

Width

74.7 mm
75.4 mm
71.76 mm

Thickness

7.3 mm
7.3 mm
7.99 mm

Weight

156.2 grams
168 grams
191 grams

Build Material

N/A
Back: Aluminium
Back: Glass

Water Resistance

N/A
N/A
Yes Water resistant IP68 IP69 (up to 30 minutes in a depth of 1.5 meter)

Ruggedness

N/A
N/A
Dust proof

Rear Camera

Rear Camera Rating

Good
Good
Excellent

Resolution

12 MP
Primary Cameraf/1.81/2.55" sensor size S5K2L9 ISO-CELL 1.4µm pixel size
12 MP
Primary Cameraf/1.751/2.9" sensor size IMX486 Exmor-RS CMOS Sensor 1.25µm pixel size
50 MP
Primary Cameraf/1.57IMX921
5 MP
f/2.4 Depth Camera
20 MP
f/1.71/2.8" sensor size 1µm pixel size
50 MP
f/2.65 Telephoto Camera
N/A
N/A
8 MP
f/2.2 Ultra-Wide Angle Camera

Autofocus

Yes
Yes Phase Detection Autofocus
Yes

OIS

N/A
No
Yes

Flash

Yes LED Flash
Yes LED Flash
Yes Dual LED Flash

Image Resolution

4000 x 3000 Pixels
4000 x 3000 Pixels
N/A

Settings

Exposure compensation ISO control
Exposure compensation ISO control
N/A

Shooting Modes

Continuous Shooting
High Dynamic Range mode (HDR)
Continuous Shooting
High Dynamic Range mode (HDR)
Burst mode
N/A

Camera Features

Digital Zoom
Auto Flash
Face detection
Touch to focus
Digital Zoom
Auto Flash
Face detection
Touch to focus
N/A

Video Recording

4k @30 fps
4k @30 fps
Full HD @30 fps
HD @120 fps
720x480 @30 fps
8k @30 fps
4k @30/60 fps
Full HD @30/60/120 fps

Front Camera

Front Camera Rating

Very Good
Very Good
Best In Class

Resolution

12 MP
f/2.0 Primary Camera1/2.8" sensor size CMOS
20 MP
f/2.2 Primary Camera1/2.8" sensor size Exmor RS 1µm pixel size
50 MP
f/2.0 Primary Camera

Autofocus

N/A
N/A
Yes

Flash

Yes Screen flash
Yes Soft light flash
Yes Screen flash

Video Recording

N/A
Full HD @30 fps
N/A

Battery

Battery Rating

Very Good
Very Good
Excellent

Capacity

3200 mAh
3010 mAh
6500 mAh

Battery Type

Li-ion
Li-Polymer
Li-ion

Quick Charging

Yes Fast Charging
Yes Quick Charging v4.0 50% in 30 minutes
Yes 90W Flash Charging

Wireless Charging

N/A
N/A
Yes 40W Wireless Charging

Battery Test Results

Battery Life (PC Mark) (The higher, the better) PCMark Battery benchmark measures battery life of a phone with various activities such as web browsing, photo editing, writing, video editing, etc.

N/A
N/A
16h 04m

Charging Time (20% to 100%) (The lower, the better)

N/A
N/A
0h 41m 0s

Storage

Internal Storage

128 GB
64 GB / 128 GB
256 GB / 512 GB

Storage Type

N/A
eMMC 5.1
UFS 4.1

Expandable Storage

Yes Up to 256 GB
No
No

Network & Connectivity

SIM Slot(s)

Dual SIM
Dual SIM
Dual SIM

SIM Type

SIM1: Nano SIM2: Nano (Hybrid)
SIM1: Nano SIM2: Nano
SIM1: Nano SIM2: Nano/eSIM

Network Support

5G Not Supported 4G
5G Not Supported 4G
5G 4G

VoLTE

Yes
Yes
Yes

SIM 1

4G Bands:
TD-LTE 2300(band 40) / 2500(band 41)
FD-LTE 2100(band 1) / 1800(band 3) / 850(band 5)
4G Bands:
TD-LTE 2300(band 40) / 2500(band 41)
FD-LTE 2100(band 1) / 1800(band 3) / 850(band 5)
N/A

SIM 2

4G Bands:
TD-LTE 2300(band 40) / 2500(band 41)
FD-LTE 2100(band 1) / 1800(band 3) / 850(band 5)
4G Bands:
TD-LTE 2300(band 40) / 2500(band 41)
FD-LTE 2100(band 1) / 1800(band 3) / 850(band 5)
5G Bands:
FDD N1 / N2 / N3 / N5 / N7 / N8 / N18 / N20 / N25 / N26 / N28 / N66 / N71 / N75
TDD N38 / N40 / N41 / N48 / N77 / N78
N/A
N/A
4G Bands:
TD-LTE 2600(band 38) / 2300(band 40) / 2500(band 41) / 2100(band 34) / 1900(band 39) / 3500(band 42) / 3700(band 43) / 3500(band 48)
FD-LTE 2100(band 1) / 1800(band 3) / 2600(band 7) / 900(band 8) / 700(band 28) / 1900(band 2) / 1700(band 4) / 850(band 5) / 1500(band 32) / 700(band 12) / 700(band 13) / 700(band 17) / 850(band 18) / 850(band 19) / 800(band 20) / 600(Band 71) / 1900(band 25) / 850(band 26) / 1700(band 66)
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SAR Value

Head: 1.180 W/kg Body: 0.573 W/kg
Head: 1.092 W/kg Body: 0.259 W/kg
N/A

Wi-Fi

Yes Wi-Fi 5 (802.11 a/b/g/n/ac) 5GHz
Yes Wi-Fi 5 (802.11 a/b/g/n/ac) 5GHz
Yes Wi-Fi 4 (802.11 a/n) 5GHz MIMO

Wi-Fi Features

Mobile Hotspot
Wi-Fi Direct Mobile Hotspot
Wi-Fi Direct Mobile Hotspot

Bluetooth

Yes v5.0
Yes v5.0
Yes v6.0

GPS

Yes with A-GPS Glonass
Yes with A-GPS Glonass
Yes with A-GPS Glonass

NFC

N/A
No
Yes

IR Blaster

N/A
N/A
Yes

Multimedia

Audio Jack

3.5 mm
USB Type-C
USB Type-C

Sensors

Fingerprint Sensor

Yes
Yes
Yes

Fingerprint Sensor Position

On-screen
Rear
On-screen

Fingerprint Sensor Type

Optical
N/A
Ultrasonic

Other Sensors

Light sensor Proximity sensor Accelerometer Compass Gyroscope
Light sensor Proximity sensor Accelerometer Compass Gyroscope
Light sensor Proximity sensor Accelerometer Compass Gyroscope

Applications

Facebook WhatsApp LINE Google Duo Gmail Amazon Lazada Flipkart Maps Newspoint WPS Office UC Browser
N/A
N/A

Compare Prices

Not Available in any store
Not Available in any store
₹79,999