Doogee S51 vs Oppo K9x

Network
2G network

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

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

HSDPA 850, 900, 1700(AWS), 1900, 2100

HSDPA 800, 850, 900, 1700(AWS), 1900, 2100; CDMA2000 1x
4G network

LTE frequency band 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 20, 25, 26, 28, 34, 38, 39, 40, 41, 66

LTE frequency band 1, 2, 3, 5, 7, 8, 28, 34, 38, 39, 40, 41
5G network

-

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

-

42.2 Mbps
HSUPA speed

-

5.76 Mbps
EV-DO speed

EV-DO Rev.A 3.1 Mbps download, 1.8 Mbps upload

-
LTE speed

LTE, Cat7, 301 Mbps download, 102 Mbps upload

LTE-A, 750 Mbps download, 211 Mbps upload
GPRS

Yes

Yes
EDGE

Yes

Yes

Display
Display type

IPS LCD

IPS LCD
Physical size

6.0 inches

6.49 inches
Resolution

720 x 1440 pixels

1080 x 2400 pixels
Pixel density

268 ppi

405 ppi
Display colors

16777216

16777216
Protection

Scratch resistant, Corning Gorilla Glass

Scratch resistant, 2.5D curved glass screen, Aluminosilicate glass
Display features

-

90Hz, 480 nits (typ), 600 nits (HBM)

Main camera
Camera type

Dual

Triple
Main camera

(wide) , 20 MP, f/1.8 , 90˚ , 1/2.9" , 1.25 µm

(wide) , 64 MP, f/1.7 , 81˚ , 1/1.97" , 0.7 µm, 26 mm, 20x digital zoom
(depth) , 2 MP, f/2.4 , 1/5" , 1.75 µm

(macro) , 2 MP, f/2.4 , 1/5" , 1.75 µm, 89˚
89˚ , (depth) , 2 MP, f/2.4 , 1/5" , 1.75 µm
Primary camera resolution

5184 x 3840 pixels

9280 x 6920 pixels
Primary camera video

1080p

1080p@30fps, gyro-EIS
Primary camera flash

quad-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, macro-mode, phase detection autofocus

Autofocus, continuous shooting, 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

Single
Selfie camera

(wide) , 8 MP, f/2.0 , 80˚

(wide) , 16 MP, f/2.0 , 79˚ , 1/3.0" , 1.0 µm
Selfie camera resolution

3264 x 2448 pixels

4640 x 3456 pixels
Selfie camera features

Face unlock

Face unlock, HDR
Selfie camera video

1080p

1080p@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
WLAN WiFi Hotspot

Yes

Yes
WLAN WiFi Direct

-

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

v5.1
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Bluetooth AptX

-

Yes
NFC

Yes

No
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GALILEO

Yes

Yes
BDS

Yes

Yes

Features
Sensors

Accelerometer, compass, fingerprint, geomagnetic, gyroscope, light, proximity

Accelerometer, compass, fingerprint, gyroscope, proximity