BLU C6L vs Realme C21

Network
2G network

GSM 850, 900, 1800, 1900

GSM 850, 900, 1800, 1900
3G network

HSDPA 850, 1700(AWS), 1900, 2100 - C0030UU; HSDPA 850, 900, 1900, 2100 - C0030LL

HSDPA 850, 900, 2100
4G network

LTE frequency band 2(1900), 4(1700/2100), 5(850), 7(2600), 12(700), 17(700) - C0030UU; LTE frequency band 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 28(700) - C0030LL

LTE frequency band 1, 3, 5, 7, 8, 20, 28, 38, 40, 41
HSDPA speed

42.2 Mbps

42.2 Mbps
HSUPA speed

11.5 Mbps

5.76 Mbps
LTE speed

LTE, Cat4, 150 Mbps download, 50 Mbps upload

LTE, Cat4, 150 Mbps download, 51 Mbps upload
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

Plastic

Glass front, plastic back, plastic frame
SIM

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

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

154.4 mm

165.2 mm
Width

78.6 mm

76.4 mm
Thickness

10.4 mm

8.9 mm
Weight

203 g

190 g
Colors

Black, Blue, Gold

Black, Blue

Display
Display type

IPS capacitive touchscreen

IPS LCD
Physical size

5.5 inches

6.5 inches
Resolution

720 x 1280 pixels

720 x 1600 pixels
Pixel density

267 ppi

270 ppi
Display colors

16777216

16777216
Protection

2.5D curved glass screen

Scratch resistant, 2.5D curved glass screen, Corning Gorilla Glass 3
Multitouch

Yes

-

OS
OS

Android 8.1 Oreo Go Edition

Android 10, Realme UI 1.0 / Android 11, Realme UI 2.0

Main camera
Camera type

-

Triple
Main camera

8 MP

13 MP, (wide) , f/2.2 , 26 mm, 1/3.06" , 1.12 µm
(macro) , 2 MP, f/2.4
(depth) , 2 MP, f/2.4
Primary camera resolution

3264 x 2448 pixels

2560 x 1920 pixels
Primary camera video

1080p@30fps

1080p@30fps
Primary camera flash

LED flash

LED flash
Camera features

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

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