Oppo K9 vs Realme X2

Network
2G network

GSM 850, 900, 1800, 1900; CDMA 800

GSM 850, 900, 1800, 1900; CDMA 800 & TD-SCDMA
3G network

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

HSDPA 850, 900, 1900, 2100
4G network

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

LTE frequency band 1(2100), 3(1800), 4(1700/2100), 5(850), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)
5G network

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

-
HSDPA speed

42.2 Mbps

42.2 Mbps
HSUPA speed

5.76 Mbps

11.5 Mbps
LTE speed

LTE-A, 1200 Mbps download, 210 Mbps upload

LTE Cat13, Cat15
GPRS

Yes

Yes
EDGE

Yes

Yes

Display
Display type

Super AMOLED

Super AMOLED capacitive touchscreen
Physical size

6.43 inches

6.4 inches
Resolution

1080 x 2400 pixels

1080 x 2340 pixels
Pixel density

409 ppi

403 ppi
Display colors

16777216

16777216
Protection

Scratch resistant, 2.5D curved glass screen

Scratch resistant, Corning Gorilla Glass 5
Multitouch

-

Yes
Display features

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

-

Hardware
CPU

Octa-core

Octa-core
CPU

Single-core 2.8 GHz Kryo 475 Prime

Dual-core 2.2 GHz Kryo 470 Gold
CPU(second)

Single-core 2.4 GHz Kryo 475 Gold

Hexa-core 1.8 GHz Kryo 470 Silver
CPU(third)

Hexa-core 1.8 GHz Kryo 475 Silver
Chipset

Qualcomm SM7250-AC Snapdragon 768G 5G

Qualcomm SDM730 Snapdragon 730G
GPU

Adreno 620

Adreno 618
Memory RAM

8 GB

6, 8 GB
Internal storage

128, 256 GB

64, 128, 256 GB
Memory card

No

microSD, microSDHC, microSDXC
Memory card max

-

256 GB
Storage

-

UFS 2.1

Main camera
Camera type

Triple

Quad
Main camera

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

64 MP, f/1.8 , 1/1.7" , 0.8 µm
(ultrawide) , 8 MP, f/2.2 , 119˚

8 MP, f/2.3 , 13 mm, 1/4" , 1.12 µm
(macro) , 2 MP, f/2.4

2 MP, f/2.4 , 1/5" , 1.75 µm
2 MP, f/2.4 , 1/5" , 1.75 µm
Primary camera resolution

9280 x 6920 pixels

9280 x 6944 pixels
Primary camera video

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

2160p@30fps, 1080p@30/60/120fps, 720p@960fps, gyro-EIS
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, 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

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

Yes
Wi-Fi display

-

Yes
WLAN WiFi Dual Band

Yes

Yes
USB

Type-C 2.0

Type-C reversible connector
USB On-The-Go

Yes

Yes
Bluetooth

v5.0

v5.0
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, compass, fingerprint, geomagnetic, gyroscope, proximity

Battery
Battery type

Li-Po

Li-Po
Battery capacity

4300 mAh

4000 mAh
Battery removable

Non-removable

Non-removable
Fast battery charging

VOOC 4.0 (100% in 35 min)

VOOC Flash Charge 3.0 (67% in 30 min)