Realme Narzo 20 vs ZTE nubia X

Network
2G network

GSM 850, 900, 1800, 1900

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

HSDPA 850, 900, 2100

HSDPA 850, 900, 1900, 2100; CDMA2000 1xEV-DO
4G network

LTE frequency band 1, 3, 5, 8, 38, 40, 41

LTE frequency band 1(2100), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 20(800), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)
HSDPA speed

42.2 Mbps

42.2 Mbps
HSUPA speed

5.76 Mbps

5.76 Mbps
LTE speed

LTE-A, Cat7, 301 Mbps download, 102 Mbps upload

LTE-A (6CA), Cat18, 1200 Mbps download, 150 Mbps upload
GPRS

Yes

Yes
EDGE

Yes

Yes

Display
Display type

IPS LCD

LTPS IPS LCD capacitive touchscreen
Physical size

6.5 inches

6.26 inches
Resolution

720 x 1600 pixels

1080 x 2280 pixels
Pixel density

270 ppi

403 ppi
Display colors

16777216

16777216
Protection

Scratch resistant, 2.5D curved glass screen

Scratch resistant, 2.5D curved glass screen, Corning Gorilla Glass 3, LTPS(Low temperature PolySilicon)
Multitouch

-

Yes
Display features

450 nits (typ), 560 nits (peak)

-
Secondary screen resolution

-

720 x 1520 pixels
Secondary screen physical size

-

5.1 inches
Secondary display

-

OLED
Secondary display protection

-

Corning Gorilla Glass 3

Main camera
Camera type

Triple

Dual
Main camera

(wide) , 48 MP, f/1.8 , 26 mm, 1/2.0" , 0.8 µm

24 MP, f/1.8
(ultrawide) , 8 MP, f/2.3 , 119˚ , 1/4.0" , 1.12 µm

24 MP, f/1.7
(macro) , 2 MP, f/2.4
Primary camera resolution

8000 x 6000 pixels

4608 x 3456 pixels
Primary camera video

1080p@30/60fps

2160p@30fps, 1080p@30fps
Primary camera flash

LED flash

dual-LED flash
Primary camera phase detection autofocus

-

phase detection autofocus
Camera features

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, super nightscape

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

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
WLAN WiFi Dual Band

Yes

Yes
USB

Type-C 2.0

Type-C 1.0 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

-
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
Beidou

-

Yes