BLU S91 vs Samsung Galaxy M21s

BLU S91

Samsung Galaxy M21s

Network
2G network

GSM 850, 900, 1800, 1900

GSM 850, 900, 1800, 1900
3G network

HSDPA 850, 900, 1700, 1900, 2100

HSDPA 850, 900, 1700(AWS), 1900, 2100
4G network

LTE frequency band 1, 2, 3, 4, 5, 7, 12, 13, 17, 28, 66

LTE frequency band 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 26, 28, 38, 40, 41, 66
HSDPA speed

42.2 Mbps

42.2 Mbps
HSUPA speed

5.76 Mbps

5.76 Mbps
LTE speed

-

LTE-A, 603 Mbps download, 150 Mbps upload
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

-

Glass front (Gorilla Glass 3), plastic back, plastic frame
SIM

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

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

164.8 mm

159.2 mm
Width

76.3 mm

75.1 mm
Thickness

8.9 mm

8.9 mm
Weight

202 g

191 g
Colors

Black, Green

Black, Blue

Main camera
Camera type

Triple

Triple
Main camera

(wide) , 13 MP

(wide) , 64 MP, f/1.8 , 26 mm, 1/1.72" , 0.8 µm
(macro) , 0.3 MP, f/2.4

(ultrawide) , 8 MP, f/2.2 , 1/4.0" , 1.12 µm
(depth) , 0.3 MP, f/2.4

(depth) , 5 MP, f/2.2
Primary camera resolution

-

9280 x 6920 pixels
Primary camera video

1080p@30fps

4K@30fps, 1080p@30fps, gyro-EIS
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, phase detection autofocus

Connectivity
WLAN

Wi-Fi 802.11a, 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

Type-C 2.0

Type-C 2.0
USB On-The-Go

Yes

-
Bluetooth

v5.0

v5.0
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
NFC

No

No
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

-

Yes
GALILEO

-

Yes
BDS

-

Yes