BLU J4 vs TCL 20L

Network
2G network

GSM 850, 900, 1800, 1900

GSM 850, 900, 1800, 1900
3G network

HSDPA 850, 900, 1900, 2100

HSDPA 850, 900, 1900, 2100 - EU/MEA/APAC; HSDPA 850, 900, 1700(AWS), 1900, 2100 - LATAM
4G network

-

LTE frequency band 1, 3, 5, 7, 8, 20, 28, 38, 40, 41 - EU/MEA/APAC; 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 25, 26, 28, 29, 38, 40, 41, 66, 71 - LATAM
HSDPA speed

21.1 Mbps

42.2 Mbps
HSUPA speed

5.76 Mbps

5.76 Mbps
LTE speed

-

LTE-A, Cat6, 300 Mbps download, 50 Mbps upload
GPRS

Yes

Class 12
EDGE

Yes

Class 12

Design
Build

Plastic

Glass front, plastic back, plastic frame
SIM

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

Single SIM (Nano-SIM) or Hybrid Dual SIM (Nano-SIM, dual stand-by)
Height

151 mm

166.2 mm
Width

72.3 mm

76.9 mm
Thickness

10 mm

9.1 mm
Weight

158 g

199 g
Colors

Black, Blue, Brown

Black, Blue

Main camera
Camera type

Single

Quad
Main camera

8 MP

48 MP, (wide) , f/2.0 , 26 mm, 1/2.0" , 0.8 µm
(ultrawide) , 8 MP, f/2.2 , 118˚ , 13 mm, 1/4.0" , 1.12 µm
(macro) , 2 MP, f/2.4
(depth) , 2 MP, f/2.4
Primary camera resolution

-

8000 x 6000 pixels
Primary camera video

720p@30fps

1080p@30/60fps
Primary camera flash

LED flash

LED flash
Camera features

-

Autofocus, continuous shooting, digital zoom, optical 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

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
WLAN WiFi Dual Band

-

Yes
USB

microUSB 2.0

Type-C 2.0
USB On-The-Go

-

Yes
Bluetooth

v4.1

v5.0
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Bluetooth AptX

-

Yes
NFC

-

Yes
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

-

Yes
GALILEO

-

Yes
BDS

-

Yes