Xiaomi Mi A2 vs vivo Y51s

Network
2G network

GSM 850, 900, 1800, 1900; CDMA 800 & TD-SCDMA

GSM 850, 900, 1800, 1900; CDMA 800, 1900 & TD-SCDMA
3G network

HSDPA 850, 900, 1900, 2100

HSDPA 850, 900, 1700(AWS), 2100
4G network

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

LTE frequency band 1, 3, 4, 5, 8, 34, 38, 39, 40, 41
5G network

-

5G band 1, 41, 78; SA/NSA
HSDPA speed

-

42.2 Mbps
HSUPA speed

-

5.76 Mbps
HSPA speed

HSPA

-
LTE speed

LTE

LTE Cat 4, 150.8 Mbps download, 51 Mbps upload
5G speed

-

3.6+ Gbps download
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

Front glass, aluminum body

Plastic
SIM

Hybrid Dual SIM (Nano-SIM, dual stand-by)

Dual SIM (Nano-SIM, dual stand-by)
Height

158.7 mm

162 mm
Width

75.4 mm

76.6 mm
Thickness

7.3 mm

8.5 mm
Weight

168 g

190 g
Colors

Black, Cherry Pink, Flame Red, Glacier Blue, Sand Gold

Black, Blue, White

Display
Display type

LTPS IPS LCD capacitive touchscreen

IPS LCD capacitive touchscreen
Physical size

5.99 inches

6.53 inches
Resolution

1080 x 2160 pixels

1080 x 2340 pixels
Pixel density

403 ppi

395 ppi
Display colors

16777216

16777216
Protection

Corning Gorilla Glass 3

-
Multitouch

Yes

-

Main camera
Camera type

Dual

Triple
Main camera

12 MP, f/1.8 , 1/2.9" , 1.25 µm, 2x optical zoom

48 MP, f/1.8 , 1/2.0" , 0.8 µm, 25 mm
20 MP, f/1.8 , 1/2.8" , 1 µm

2 MP, f/2.4
2 MP, f/2.4
Primary camera resolution

4000 x 3000 pixels

8000 x 6000 pixels
Primary camera video

2160p@30fps, 1080p@30fps, 720p@120fps

4K@30fps, 1080p@30fps; gyro-EIS
Primary camera Autofocus

phase detection autofocus

-
Primary camera flash

LED flash

LED flash
Electronic image stabilization

EIS (gyro)

-
Camera features

Geo-tagging, HDR, face detection, panorama, touch focus

Autofocus, continuous shooting, digital zoom, digital image stabilization, geotagging, panorama, HDR, touch focus, face detection, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode, macro-mode, phase detection autofocus, RAW

Connectivity
WLAN

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5Ghz, 802.11ac
WLAN WiFi Hotspot

Yes

Yes
WLAN WiFi Direct

Yes

Yes
WLAN WiFi Dual Band

Yes

Yes
USB

Type-C 1.0 reversible connector

microUSB 2.0
USB On-The-Go

-

Yes
Bluetooth

v5.0

v5.0
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Bluetooth AptX

-

aptX HD
Infrared

Yes

-
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

-
GALILEO

-

Yes
BDS

Yes

Yes

Features
Messaging SMS

SMS(threaded view)

-
Messaging MMS

MMS

-
Messaging Email

Email

-
Messaging IM

IM

-
Messaging Push Email

Push Email

-
Sensors

Fingerprint (rear-mounted), accelerometer, compass, gyro, proximity

Accelerometer, compass, gyroscope, proximity