Realme X3 vs Xiaomi 12S Ultra

Network
2G network

GSM 850, 900, 1800, 1900

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

HSDPA 850, 900, 2100

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

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

LTE frequency band 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 26, 34, 38, 39, 40, 41, 42
5G network

-

5G band 1, 3, 5, 8, 28, 38, 40, 41, 77, 78, 79 SA/NSA
HSDPA speed

42.2 Mbps

42.2 Mbps
HSUPA speed

5.76 Mbps

5.76 Mbps
LTE speed

LTE-A

LTE-A
GPRS

Yes

Class 33
EDGE

Yes

Class 33

Design
Build

Glass front (Gorilla Glass 5), glass back, plastic frame

Glass front (Gorilla Glass Victus), eco leather back, aluminum frame
SIM

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

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

163.8 mm

163.2 mm
Width

75.8 mm

75 mm
Thickness

8.9 mm

9.1 mm
Weight

202 g

225 g
Colors

Blue, White

Black, Green

Display
Display type

IPS LCD capacitive touchscreen

LTPO2 AMOLED
Physical size

6.6 inches

6.73 inches
Resolution

1080 x 2400 pixels

1440 x 3200 pixels
Pixel density

399 ppi

522 ppi
Display colors

16777216

1073741824
Protection

Corning Gorilla Glass 5

Scratch resistant, Corning Gorilla Glass Victus
Display features

120Hz refresh rate

120Hz, Dolby Vision, HDR10+, 1000 nits (HBM), 1500 nits (peak)

Main camera
Camera type

Quad

Quad
Main camera

64 MP, f/1.8 , 26 mm, 1/1.72" , 0.8 µm

50 MP, f/1.9 , 23 mm, 1.0" , 1.6 µm, (wide)
12 MP, f/2.5 , 51 mm, 2x optical zoom

48 MP, f/4.1 , 120 mm, (periscope telephoto) , 1/2.0" , 0.8 µm
8 MP, f/2.3 , 16 mm, 1/4.0" , 1.12 µm

48 MP, f/2.2 , 13 mm, 1/2.0" , 0.8 µm, 128˚ , (ultrawide)
2 MP, f/2.4
Primary camera resolution

8000 x 6000 pixels

-
Primary camera video

4K@30/60fps, 1080p@30/60fps, 720p@960fps; gyro-EIS

8K@24fps, 4K@30/60fps, 1080p@30/60/120/240fps, 720p@3840fps, gyro-EIS, Dolby Vision HDR 10-bit rec. (4K, 1080p)
Primary camera optics

-

Leica lens
Primary camera flash

LED flash

dual-LED flash
Camera features

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, macro mode, phase detection autofocus

Autofocus, continuous autofocus, continuous shooting, digital zoom, optical zoom, digital image stabilization, optical image stabilization, geotagging, panorama, HDR, touch focus, face detection, face unlock, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode, phase detection autofocus, super night mode 2.0, HDR10 video recording

Selfie camera
Selfie camera type

Dual

Single
Selfie camera

16 MP, f/2.0 , 26 mm, 1/3.06" , 1.0 µm

32 MP, f/2.4 , 25 mm, 1/3" , 0.7 µm, (wide) , 80˚
8 MP, f/2.2 , 1/4.0" , 1.12 µm
Selfie camera resolution

4640 x 3456 pixels

-
Selfie camera features

-

Face unlock, HDR, panorama
Selfie camera video

1080p@30fps, gyro-EIS

1080p@30/60fps

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
Wi-Fi display

Yes

-
WLAN WiFi Dual Band

Yes

Yes
WLAN DLNA

-

Yes
USB

Type-C 1.0 reversible connector

Type-C 2.0
USB On-The-Go

-

Yes
Bluetooth

v5.0

v5.2
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Bluetooth AptX

-

aptX HD, aptX Adaptive
Infrared

-

Yes
NFC

-

Yes
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GALILEO

Yes

Yes
BDS

Yes

Yes
QZSS

Yes

Yes
NavIC

-

Yes

Features
Sensors

Accelerometer, compass, fingerprint, gyroscope, proximity

Accelerometer, barometer, color spectrum, compass, fingerprint, gyroscope, virtual proximity sensing

Battery
Battery type

Li-Po

Li-Po
Battery capacity

4200 mAh

4860 mAh
Battery removable

Non-removable

Non-removable
Fast battery charging

SuperVOOC Flash Charge (100% in 55 min)

Quick Charge 4+, 67W (100% in 41 min)
Wireless reverse charging

-

Yes, 10W
Fast wireless charging

-

Yes, 50W (100% in 52 min)