BLU J4 vs Xiaomi Mi A3

Network
2G network

GSM 850, 900, 1800, 1900

GSM 850, 900, 1800, 1900
3G network

HSDPA 850, 900, 1900, 2100

HSDPA 850, 900, 1700, 1900, 2100
4G network

-

LTE frequency band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 20(800), 28(700), 38(2600), 40(2300)
HSDPA speed

21.1 Mbps

42 Mbps
HSUPA speed

5.76 Mbps

5.76 Mbps
LTE speed

-

LTE, Cat12, 603 Mbps download, 102 Mbps upload
GPRS

Yes

Yes
EDGE

Yes

Yes

Display
Display type

IPS LCD capacitive touchscreen

Super AMOLED capacitive touchscreen
Physical size

5.5 inches

6.09 inches
Resolution

720 x 1440 pixels

720 x 1560 pixels
Pixel density

293 ppi

282 ppi
Display colors

16777216

16777216
Protection

-

Scratch resistant, Corning Gorilla Glass 5
Multitouch

Yes

Yes
Display features

-

HDR10, DC dimming

Main camera
Camera type

Single

Triple
Main camera

8 MP

48 MP, f/1.79 , 1/2" , 0.8 µm
8 MP, f/2.2 , 1.12 µm
2 MP, f/2.4 , 1.75 µm
Primary camera resolution

-

8000 x 6000 pixels
Primary camera video

720p@30fps

2160p@30fps, 1080p@30/60/120fps
Primary camera flash

LED flash

dual-LED flash
Camera features

-

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

Connectivity
WLAN

Wi-Fi 802.11b, 802.11g, 802.11n

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
Wi-Fi display

-

Yes
WLAN WiFi Dual Band

-

Yes
USB

microUSB 2.0

Type-C 1.0 reversible connector
USB On-The-Go

-

Yes
Bluetooth

v4.1

v5.0
Bluetooth A2DP

Yes

Yes
bluetooth HID

-

Yes
bluetooth LE

Yes

Yes
Bluetooth EDR

-

Yes
Bluetooth AptX

-

aptX HD
Infrared

-

Yes
NFC

-

Yes
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

-

Yes
GALILEO

-

Yes
Beidou

-

Yes