Samsung Galaxy Z Flip4 vs Xiaomi Redmi Note 9

Samsung Galaxy Z Flip4

Xiaomi Redmi Note 9

Network
2G network

GSM 850, 900, 1800, 1900; CDMA 800, 1900

GSM 850, 900, 1800, 1900
3G network

HSDPA 850, 900, 1700(AWS), 1900, 2100; CDMA2000 1xEV-DO

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

LTE frequency band 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 28, 29, 34, 38, 39, 40, 41, 66

LTE frequency band 1, 2, 3, 4, 5, 7, 8, 20, 28, 38, 40, 41
5G network

5G band 1, 3, 20, 41, 77, 78, 79, 81 SA/NSA/Sub6/mmWave

-
HSDPA speed

42.2 Mbps

42.2 Mbps
HSUPA speed

5.76 Mbps

5.76 Mbps
EV-DO speed

-

3.1 Mbps download, 1.8 Mbps upload
LTE speed

LTE-A (6CA)

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

Yes

Yes
EDGE

Yes

Yes

Design
Build

Plastic front (opened), glass back (Gorilla Glass Victus+), aluminum frame

Glass front (Gorilla Glass 5), plastic frame
SIM

Nano-SIM, eSIM

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

84.9 mm

162.3 mm
Width

71.9 mm

77.2 mm
Thickness

15.9-17.1 mm

8.9 mm
Height unfolded

165.2 mm

-
Width unfolded

71.9 mm

-
Thickness unfolded

6.9 mm

-
Weight

187 g

199 g
Payment

Samsung Pay (Visa, MasterCard certified)

-
Waterproof

IPX8, 1.5m and 30 minutes

-
Splash resistant

-

Yes
Colors

Blue, Pink Gold, Graphite, Khaki, Navy, Purple, Red, Yellow

Green, Grey, White

Display
Display type

Foldable Dynamic AMOLED 2X

IPS LCD capacitive touchscreen
Physical size

6.7 inches

6.53 inches
Resolution

1080 x 2640 pixels

1080 x 2340 pixels
Pixel density

426 ppi

395 ppi
Display colors

16777216

16777216
Protection

-

Scratch resistant, 2.5D curved glass screen, Corning Gorilla Glass 5, Oleophobic coating
Display features

120Hz, HDR10+, 1200 nits (peak)

-
Cover display

Super AMOLED

-
Cover display physical size

1.9 inches

-
Cover display resolution

260 x 512 pixels

-

Main camera
Camera type

Dual

Quad
Main camera

(wide) , 12 MP, f/1.8 , 83˚ , 24 mm, 1.8 µm, 10x digital zoom

48 MP, f/1.8 , 26 mm, 0.8 µm, 1/2.0"
(ultrawide) , 12 MP, f/2.2 , 123˚ , 1.12 µm

8 MP, f/2.2 , 1.12 µm, 1/4.0"
2 MP, f/2.4
2 MP, f/2.4
Primary camera resolution

4032 x 3024 pixels

8000 x 6000 pixels
Primary camera video

4K@30/60fps, 1080p@60/240fps, 720p@960fps, HDR10+

1080p@30fps
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, phase detection autofocus, tracking autofocus

Autofocus, 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

Selfie camera
Selfie camera type

Single

-
Selfie camera

(wide) , 10 MP, f/2.4 , 80˚ , 26 mm, 1.22 µm

16 MP, f/2.3 , 29 mm, 1.12 µm, 1/3.1"
Selfie camera resolution

-

4160 x 3120 pixels
Selfie camera features

Autofocus, face unlock, HDR

-
Selfie camera video

4K@30fps

1080p@30fps

Connectivity
WLAN

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5GHz, 802.11ac, 802.11ax

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

Yes
USB

Type-C 2.0

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

Yes

-
Bluetooth

v5.2

v5.0
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Infrared

-

Yes
NFC

Yes

Yes (market dependent)
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GALILEO

Yes

Yes
Beidou

-

Yes
BDS

Yes

-

Features
Sensors

Accelerometer, barometer, compass, fingerprint, gyroscope, proximity

Accelerometer, compass, fingerprint, gyroscope, light, proximity