Nokia XR21 vs Oppo K9x

Network
2G network

GSM 850, 900, 1800, 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, 20, 25, 26, 28, 32, 38, 39, 40, 41, 42, 43, 48, 66, 71

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

5G band 1, 2, 3, 5, 7, 20, 25, 28, 40, 41, 66, 71, 77, 78, 79 SA/NSA

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

45.4 Mbps

42.2 Mbps
HSUPA speed

5.76 Mbps

5.76 Mbps
EV-DO speed

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

-
LTE speed

LTE-A, 750 Mbps download, 211 Mbps upload

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

Yes

Yes
EDGE

Yes

Yes

Design
Build

Glass front (Gorilla Glass Victus), plastic back, plastic frame

Plastic, glass
SIM

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

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

168 mm

162.2 mm
Width

78.6 mm

74.8 mm
Thickness

10.6 mm

8.8 mm
Weight

231 g

194 g
Waterproof

IP68/IP69K (1.5m and 60 mins)

-
Dust proof

IP68/IP69K

-
MIL-STD-810H

Yes

-
Colors

Black, Green

Black, Blue

Display
Display type

IPS LCD

IPS LCD
Physical size

6.49 inches

6.49 inches
Resolution

1080 x 2400 pixels

1080 x 2400 pixels
Pixel density

406 ppi

405 ppi
Display colors

16777216

16777216
Protection

2D curved glass screen, Corning Gorilla Glass Victus

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) , 64 MP, f/1.8 , 1/2"

(wide) , 64 MP, f/1.7 , 1/1.97" , 81˚ , 26 mm, 0.7 µm, 20x digital zoom
(ultrawide) , 8 MP, f/2.2 , 1/4.0" , 1.12 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

9280 x 6920 pixels

9280 x 6920 pixels
Primary camera video

4K@30fps, 1080p@30fps

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

dual-LED dual-tone flash

LED flash
Camera features

Autofocus, geotagging, panorama, HDR, touch focus, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode, speedwarp

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) , 16 MP, f/2.4

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

4608 x 3456 pixels

4640 x 3456 pixels
Selfie camera features

Face unlock, HDR

Face unlock, HDR
Selfie camera video

1080p@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
WLAN WiFi Dual Band

Yes

Yes
USB

Type-C 2.0

Type-C 2.0
USB On-The-Go

Yes

Yes
Bluetooth

v5.1

v5.1
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Bluetooth AptX

aptX Adaptive

Yes
NFC

Yes (market dependent)

No
GPS

Yes, with dual-band A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GALILEO

Yes

Yes
BDS

Yes

Yes
QZSS

Yes

-
NavIC

Yes

-

Features
Sensors

Accelerometer, barometer, compass, fingerprint, gyroscope, proximity

Accelerometer, compass, fingerprint, gyroscope, proximity

Battery
Battery type

Li-Po

Li-Po
Battery capacity

4800 mAh

5000 mAh
Battery removable

Non-removable

Non-removable
Fast battery charging

USB Power Delivery 2.0, 33W

VOOC 4.0, 33W (50% in 27 min)
Reverse charging

-

Yes