Oppo K9 vs Samsung Galaxy Z Flip4

Network
2G network

GSM 850, 900, 1800, 1900; CDMA 800

GSM 850, 900, 1800, 1900; CDMA 800, 1900
3G network

HSDPA 800, 850, 900, 1700(AWS), 1900, 2100; CDMA2000 1x

HSDPA 850, 900, 1700(AWS), 1900, 2100; CDMA2000 1xEV-DO
4G network

LTE frequency band 1, 3, 4, 5, 8, 28, 34, 38, 39, 40, 41

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
5G network

5G band 1, 3, 28, 41, 77, 78 SA/NSA

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
LTE speed

LTE-A, 1200 Mbps download, 210 Mbps upload

LTE-A (6CA)
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

Aluminium alloy, glass

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

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

Nano-SIM, eSIM
Height

159.1 mm

84.9 mm
Width

73.4 mm

71.9 mm
Thickness

7.9 mm

15.9-17.1 mm
Height unfolded

-

165.2 mm
Width unfolded

-

71.9 mm
Thickness unfolded

-

6.9 mm
Weight

172 g

187 g
Payment

-

Samsung Pay (Visa, MasterCard certified)
Waterproof

-

IPX8, 1.5m and 30 minutes
Colors

Aurora, Black

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

Display
Display type

Super AMOLED

Foldable Dynamic AMOLED 2X
Physical size

6.43 inches

6.7 inches
Resolution

1080 x 2400 pixels

1080 x 2640 pixels
Pixel density

409 ppi

426 ppi
Display colors

16777216

16777216
Protection

Scratch resistant, 2.5D curved glass screen

-
Display features

90Hz, 430 nits (typ), 750 nits (peak)

120Hz, HDR10+, 1200 nits (peak)
Cover display

-

Super AMOLED
Cover display physical size

-

1.9 inches
Cover display resolution

-

260 x 512 pixels

Hardware
CPU

Octa-core

Octa-core
CPU

Single-core 2.8 GHz Kryo 475 Prime

Single-core 3.19 GHz Cortex-X2
CPU(second)

Single-core 2.4 GHz Kryo 475 Gold

Triple-core 2.75 GHz Cortex-A710
CPU(third)

Hexa-core 1.8 GHz Kryo 475 Silver

Quad-core 1.8 GHz Cortex-A510
Chipset

Qualcomm SM7250-AC Snapdragon 768G 5G

Qualcomm SM8475 Snapdragon 8+ Gen 1
GPU

Adreno 620

Adreno 730
Memory RAM

8 GB

8 GB
Internal storage

128, 256 GB

128, 256, 512 GB
Memory card

No

No
Storage

-

UFS 3.1

Main camera
Camera type

Triple

Dual
Main camera

(wide) , 64 MP, f/1.7 , 80˚ , 1/2.0" , 0.8 µm, 20x digital zoom

(wide) , 12 MP, f/1.8 , 83˚ , 1.8 µm, 10x digital zoom , 24 mm
(ultrawide) , 8 MP, f/2.2 , 119˚

(ultrawide) , 12 MP, f/2.2 , 123˚ , 1.12 µm
(macro) , 2 MP, f/2.4
Primary camera resolution

9280 x 6920 pixels

4032 x 3024 pixels
Primary camera video

4K@30fps, 1080p@30/60/120fps; gyro-EIS

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

LED flash

LED flash
Camera features

Autofocus, continuous autofocus, continuous shooting, digital zoom, digital image stabilization, optical 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, contrast detection autofocus

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

Selfie camera
Selfie camera type

Single

Single
Selfie camera

(wide) , 32 MP, f/2.4 , 80˚ , 0.8 µm

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

6560 x 4928 pixels

-
Selfie camera features

Face unlock, digital image stabilization

Autofocus, face unlock, HDR
Selfie camera video

1080p@30fps

4K@30fps

Connectivity
WLAN

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5Ghz, 802.11ac

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

Yes

Yes
WLAN WiFi Direct

Yes

Yes
WLAN WiFi Dual Band

Yes

Yes
USB

Type-C 2.0

Type-C 2.0
USB On-The-Go

Yes

Yes
Bluetooth

v5.0

v5.2
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Bluetooth AptX

aptX HD

-
NFC

No

Yes
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GALILEO

Yes

Yes
BDS

Yes

Yes
QZSS

Yes

-

Features
Sensors

Accelerometer, compass, fingerprint, gyroscope, proximity

Accelerometer, barometer, compass, fingerprint, gyroscope, proximity

Battery
Battery type

Li-Po

Li-Po
Battery capacity

4300 mAh

3700 mAh
Battery removable

Non-removable

Non-removable
Fast battery charging

VOOC 4.0 (100% in 35 min)

Quick Charge, 25W (50% in 30 min)
Wireless reverse charging

-

Yes, 4.5W
Fast wireless charging

-

Qi, 15W