Xiaomi Mi Mix Fold vs Samsung Galaxy S21 Ultra Specs Comparison

Availability

Officially announced
	Jan 14, 2021
Prices (MSRP)
	$1200 | €1399

Design

Dimensions
6.82 x 5.25 x 0.30 inches 173.3 x 133.4 x 7.6 mm	6.50 x 2.98 x 0.35 inches (~0.37 inches with camera bump) 165.1 x 75.6 x 8.9 mm (~9.4 mm with camera bump)
Folded
(173.3 x 69.8 x 17.2 mm)
Weight
11.18 oz / 317.0 g	8.04 oz / 229.0 g
Materials
Back: Glass (Corning Gorilla Glass 5) Frame: Aluminum	Back: Glass (Corning Gorilla Glass Victus) Frame: Aluminum
Resistance
	Water, Dust; IP68
Biometrics
	2D Face unlock, Ultrasonic in-screen fingerprint
Keys
Right: Volume control, Lock/Unlock key	Right: Volume control, Lock/Unlock key
Colors
Black, Ceramic	Phantom black, Silver

Display

Size
8.0-inch, 86.01% screen-to-body	6.8-inch, 89.33% screen-to-body
Type
AMOLED, HDR, 900 nits	Dynamic AMOLED, 120Hz, HDR, 1500 nits
Resolution
2480x1860px, 4:3 ratio, 387 PPI	3200x1440px, 20:9 ratio, 516 PPI
Protection
	Corning Gorilla Glass Victus
Features
Folding inside the device, HDR support, Ambient light sensor, Proximity sensor
Front cover display
6.5 inches 2520 x840 px AMOLED 90Hz refresh rate, HDR support

PhoneArena Display Test

Bright Max (20% APL)
Untested	Untested
Bright Min
Untested	1.5 (Good)

Learn more on our PhoneArena Display Test Results page.

Hardware

System chip
Snapdragon 888 SM8350 (5 nm)	Snapdragon 888 SM8350 (5 nm)
Processor
Octa-core 1x2.84GHz Kryo 680 3x2.42GHz Kryo 680 4x1.80GHz Kryo 680	Octa-core 1x2.84GHz Kryo 680 3x2.42GHz Kryo 680 4x1.80GHz Kryo 680
GPU
Adreno 660	Adreno 660
Memory
12GB/256GB (UFS 3.1) 12GB/512GB 16GB/512GB	12GB (LPDDR5)/128GB (UFS 3.1) 12GB/256GB 16GB/512GB
Storage expansion
not expandable	not expandable
OS
Android (10)	Android (14, 13, 12, 11)

PhoneArena Performance Test

GeekBench 6 Single
Untested	1117
GeekBench 6 Multi
Untested	3312
3D Mark High
Untested	1963
3D Mark Low
Untested	1179

Learn more on our PhoneArena Performance Test Results page.

Battery

Type
5020 mAh	5000 mAh, Li - Polymer
Charging
Fast charging	Qualcomm Quick Charge 2.0, USB Power Delivery, Samsung Adaptive Fast Charging Qi and Powermat wireless charging, Reverse wireless charging
Charge speed
Wired: 67.0W	Wired: 25.0W Wireless: 15.0W

PhoneArena Battery Tests

Battery Life Estimate

Untested

Browsing

Untested

Video

Untested

Gaming

Untested

Battery Life Estimate

6h 15min

Browsing

14h 43min

Video

8h 52min

Gaming

8h 40min

Learn more on our PhoneArena Battery Test Results page

Camera

Rear
	Quad camera
Main camera
108 MP (PDAF) Aperture size: F1.8 Sensor size: 1/1.52” Pixel size: 0.7 μm	108 MP (OIS, Laser and PDAF) Aperture size: F1.8 Focal length: 24 mm Sensor size: 1/1.33" Pixel size: 0.8 μm
Second camera
13 MP (Ultra-wide) Aperture size: F2.4 Pixel size: 1.12 μm	12 MP (Ultra-wide, PDAF) Aperture size: F2.2 Focal Length: 13 mm Sensor size: 1/2.55" Pixel size: 1.4 μm
Third camera
8 MP (Telephoto) Optical zoom: 3.0x Focal Length: 80 mm	10 MP (Telephoto, OIS, PDAF) Optical zoom: 3.0x Aperture size: F2.4 Focal Length: 70 mm Sensor size: 1/3.2" Pixel size: 1.22 μm
Fourth camera
	10 MP (Telephoto, Periscope, OIS, PDAF) Optical zoom: 3.0x Aperture size: F2.4 Focal Length: 70 mm Sensor size: 1/3.2" Pixel size: 1.22 μm
Flash
Dual LED	LED
Video recording
Yes	8K UHD (24 fps), 4K UHD (60 fps), 1080p (240 fps), 720p (960 fps) OIS, HDR, Hyperlapse, Video light, EIS
Front
20 MP	40 MP (PDAF, HDR) Video capture: 4K UHD (60 fps)

Connectivity & Features

Bluetooth
5.2	5.1
WLAN
a,b,g,n,ac,Wi-Fi 6 Wi-Fi Direct, Hotspot 802.11 a, b, g, n, ac, ax	a,b,g,n,ac,Wi-Fi 6,dual-band MIMO, Wi-Fi Direct, Hotspot 802.11 a, b, g, n, ac, ax
USB
Type-C	Type-C, USB 3.2
Sensors
Accelerometer, Gyroscope, Compass, Barometer, Ambient light sensor, Proximity sensor	Accelerometer, Gyroscope, Compass, Hall (for flip covers), Barometer, Ambient light sensor, Proximity sensor
Hearing aid compatible
	M3/T3
Location
GPS, A-GPS, Glonass, Galileo, BeiDou, QZSS, NavIC, Cell ID, Wi-Fi positioning	GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
Other
NFC, Infrared	NFC, ANT+

Multimedia

Headphones
No 3.5mm jack	No 3.5mm jack
Speakers
Earpiece, Multiple speakers	Earpiece, Multiple speakers
Features
	32-Bit DAC, Dolby Atmos, aptX, Dolby Digital, Dolby Digital Plus

Cellular

5G Bands
n1, n3, n28, n41, n77, n78, n79, SA, NSA	n2, n5, n12, n25, n41, n66, n71, n77, n260, n261, SA, NSA, Sub-6, mmWave
4G (FDD) Bands
1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28	1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 30, 66, 71
4G (TDD) Bands
34, 38, 39, 40, 41, 42	38, 39, 40, 41, 46, 48
3G Bands
1, 2, 4, 5, 6	1, 2, 4, 5, 8
Data Speed
LTE-A, HSDPA+ (4G) 42.2 Mbit/s	LTE-A Pro Cat 20 (2000/150 Mbit/s)
Dual SIM
Yes
SIM type
Nano SIM	Nano SIM

Regulatory Approval

FCC approval
	Date approved: Dec 22, 2020 FCC ID value: A3LSMG998U
Measured SAR
	Head: 0.77 W/kg Body: 1.02 W/kg Simultaneous Transmission: 1.59 W/kg Wireless Router: 1.16 W/kg Phablet: 3.15 W/kg

Alternative variants

With 512 GB internal storage

Memory	512GB

with 256GB storage

Memory	256GB
Colors	Phantom black
Prices (MSRP)	$1250

With 16GB RAM and 512GB internal storage

Memory	16GB/512GB

with 512GB storage

Memory	16GB/512GB
Colors	Phantom black
Prices (MSRP)	$1380

With ceramic back

Weight	11.71 oz / 332.0 g
Materials	Back: Ceramic

for Europe

System chip	Samsung Exynos 2100 (5 nm)
Processor	Octa-core 1x2.91GHz Cortex-X1 3x2.81G​Hz Cortex-A78 4x2.2G​Hz Cortex-A55
GPU	Mali G78 MP14
Weight	8.01 oz / 227.0 g
5G Bands	SA, NSA, Sub-6
FCC approval	Date approved: Dec 22, 2020 FCC ID value: A3LSMG998B
Measured SAR	Head: 0.16 W/kg Body: 0.72 W/kg Simultaneous Transmission: 1.59 W/kg Wireless Router: 1.34 W/kg Phablet: 3.86 W/kg

Discover more

Full Specs Xiaomi Mi Mix Fold Specs

Full Specs Samsung Galaxy S21 Ultra Specs PA Review Samsung Galaxy S21 Ultra Review