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Samsung Galaxy S21 Ultra 5G vs Xiaomi Mi Mix Fold

Samsung Galaxy S21 Ultra 5G SamsungGalaxy S21 Ultra 5G
VS
Xiaomi Mi Mix Fold XiaomiMi Mix Fold

The third device is shown on desktop screens only

General

Device Type
Smart Phone
Foldable Phone
Device Name
SM-G998BSM-G998B/DSSM-G998USM-G998U1SM-G998WSM-G998NSM-G9980
Xiaomi Mi Mix Fold
Announced
January 2021
March 2021
Released
January 2021
April 2021
Colors
Phantom BlackPhantom SilverPhantom TitaniumPhantom NavyPhantom Brown
BlackCeramic

Design

Length
165.1 mm (6.5 in)
Unfolded: 173.3 mmFolded: 173.3 mm
Width
75.6 mm (2.98 in)
Unfolded: 133.4 mmFolded: 69.8 mm
Thickness
8.9 mm (0.35 in)
Unfolded: 7.6 mmFolded: 17.2 mm
Weight
227 g (Sub6)229 g (mmWave)
317 g (Glass)332 g (Ceramic)
Materials
Glass front (Gorilla Glass Victus)Glass back (Gorilla Glass Victus)Aluminum frame
—

Network

2G Network
Yes
Yes
3G Network
Yes
Yes
4G Network
Yes
Yes
5G Network
Yes
Yes
GPRS
Yes
Yes
EDGE
Yes
Yes
SIM
Nano SIM/eSIM
Nano SIM
Multi SIM
Single SIM or Dual SIM
Dual SIM
Speed
3G Up to 42 MB4G Up to 2 GB5G Up to 7.5 GB
Same on both

Display

Display Type
Dynamic AMOLED 2X
Foldable AMOLED
Size
6.8 Inches
8.01 Inches
Refresh Rate
120 Hz
—
Resolution
1440x3200 Pixels (2K+)
1860x2480 Pixels (2K+)
Screen Ratio
89.8%
85.9%
Aspect Ratio
20:9
4:3
Pixel Density
515 PPI
387 PPI
Brightness Level
1500 Nits
900 Nits (Peak)600 Nits
Display Protection
Corning Gorilla Glass Victus
—
Features
Always-on DisplayFrameless16M Colors
Dolby VisionEye Care DisplayDark Mode1B ColorsCover Display: • AMOLED • 6.52 Inches • 90 Hz • 840x2520 Pixels (27:9) • HDR10+/Dolby Vision
On both: HDR10+, Hole-punch Notch, Capacitive, Multi-touch

Hardware

Chipset
Samsung Exynos 2100 (Global)Snapdragon 888 (USA/China)
Qualcomm Snapdragon 888 5G
Manufacturing Technology
5 nm
5 nm
CPU Type
Octa-core
8 (Octa-core)
CPU
Exynos 2100 (1x2.9 GHz & 3x2.80 & 4x2.2 GHz)Snapdragon 888 (1x2.84 & 3x2.42 GHz & 4x1.80 GHz)
1x2.84 GHz (Kryo 680)3x2.42 GHz (Kryo 680)4x1.80 GHz (Kryo 680)
GPU
Mali-G78 MP14 (Exynos 2100)Adreno 660 (Snapdragon 888)
Adreno 660
RAM (Memory)
12 GB (128 GB)
12 GB (512 GB)
On both: 12/16 GB, 12 GB (256 GB), 16 GB (512 GB)
Internal Storage
128/256/512 GB
256/512 GB
Storage Type
UFS 3.1
UFS 3.1
Ram Type
LPDDR5
LPDDR5
Card Slot
No
No

Software

OS
Android 11
Android 10
User Interface
One UI 3.1
MIUI 12

Main camera

Camera Setup
Quad Camera
Triple Camera
Resolution
108 + 10 + 10 + 12 MP
108 MP + 8 MP + 13 MP
Camera
108 MP: Standard (OIS)10 MP: Periscope Telephoto (OIS)10 MP: Telephoto (AF)12 MP: Ultrawide (AF)
108 MP: Standard8 MP: Telephoto (PDAF)13 MP: Ultrawide
Aperture Size
F/1.8 (108 MP)F/4.9 (10 MP)F/2.4 (10 MP)F/2.2 (12 MP)
F/1.8 (108 MP)F/2.4 (13 MP)
Sensor
—
Samsung HM2 (108 MP)Unknown (8 MP)Unknown (13 MP)
Stabilization
Optical Stabilization (OIS)Electronic Stabilization (EIS)
Electronic Stabilization (EIS)
Zoom
Optical Zoom 10xDigital Zoom 100x
Optical Zoom 3xDigital Zoom 30x
Slow Motion
FHD 1080P@240fpsHD 720P@960fps
FHD 1080P@960fpsFHD 1080P@120/240fps
Video
8K 4320P@24fpsHDR10+ Recording
8K 4320P@24/30fps
On both: 4K 2160P@30/60fps, FHD 1080P@30/60fps
Flash
Yes
Yes
More details (1)Camera Features
Camera Features
Laser AF
No extras
On both: Autofocus (AF), Night Mode, Portrait Mode, Pro Mode, AI Scene Detection, Continuous shooting, Panorama, Exposure compensation, Face detection, Geotagging, HDR, ISO settings, Scene mode, Self-timer, Touch focus, White balance settings

Selfie Camera

Camera
40 MP
20 MP
Aperture Size
F/2.2
—
Video
4K 2160P@30/60fpsFHD 1080P@30fps
FHD 1080P@30/60fpsElectronic Stabilization (EIS)
Slow Motion
—
HD 720P@120fps
Flash
No
No
More details (1)Camera Features
Camera Features
Autofocus (AF)
Night Mode
On both: Portrait Mode, Beauty Mode, Face Detection, Gesture Shot, HDR

Connectivity

Wi-Fi
Wi-Fi 802.11a/b/g/n/ac/6eDual-bandWi-Fi DirectHotspot
Same on both
Bluetooth
5.2A2DPLE
Same on both
Location
No extras
QZSSNavIC
On both: GPS, A-GPS, GLONASS, GALILEO, BDS
NFC
Yes
Yes
IR blaster
—
Yes
USB
USB Type-C 3.2
USB Type-C 2.0

Media

Loudspeaker
Yes - Stereo speakers
Yes - Stereo speakers (4 Speakers)
3.5mm jack
No
No
FM Radio
Yes (Snapdragon model only)• 32-bit/384kHz audio • Sound by AKG
No• Sound by Harman Kardon • 24-bit/192kHz

Other specifications

Sensors
No extras
Color spectrum
On both: Accelerometer, Gyroscope, Proximity, Compass, Barometer
Lock Type
Fingerprint (Under Display - Ultrasonic)
Fingerprint (Side-mounted)
On both: Facial Recognition, Pattern, PIN, Password
Water/Dust Resistant
Yes - IP68 dust/water resistant (up to 1.5m for 30 mins)
—
Box Contents
No extras
Power Adapter (67 W)Protective Case
On both: Device, USB Cable, SIM Eject Tool, Quick start guide
Other Features
Stylus supportSamsung PaySamsung DeXBixby
—

Charging and Battery

Fast Charging
Yes - 25 W
Yes - 67 W (100% in 37 min)
Wireless Charging
Yes - 15 W (Qi/PMA)Reverse wireless charging 4.5W
—
Capacity
5000 mAh
5020 mAh

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Copyright © 2026 NXT Test. All Rights Reserved