Samsung Galaxy S21 Ultra vs Amazon Fire HD 10 Plus (2021) Specs Comparison

Availability

Officially announced
Jan 14, 2021	Apr 27, 2021
Prices (MSRP)
$1200 | €1399

Design

Dimensions
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)	9.72 x 6.54 x 0.36 inches 247 x 166 x 9.2 mm
Weight
8.04 oz / 229.0 g	16.40 oz / 465.0 g
Materials
Back: Glass (Corning Gorilla Glass Victus) Frame: Aluminum	Back: Plastic
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
Phantom black, Silver	Black, Denim, Olive, Lavender

Display

Size
6.8-inch, 89.33% screen-to-body	10.1-inch, 72.12% screen-to-body
Type
Dynamic AMOLED, 120Hz, HDR, 1500 nits	IPS LCD, 60Hz
Resolution
3200x1440px, 20:9 ratio, 516 PPI	1920x1200px, 16:10 ratio, 224 PPI
Protection
Corning Gorilla Glass Victus

PhoneArena Display Test

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

Learn more on our PhoneArena Display Test Results page.

Hardware

System chip
Snapdragon 888 SM8350 (5 nm)	MediaTek Helio P60T MT8183 (12 nm)
Processor
Octa-core 1x2.84GHz Kryo 680 3x2.42GHz Kryo 680 4x1.80GHz Kryo 680	Octa-core 2000 MHz Cortex-A73
GPU
Adreno 660	Mali-G72 MP3
Memory
12GB (LPDDR5)/128GB (UFS 3.1) 12GB/256GB 16GB/512GB	4GB/32GB 4GB/64GB
Storage expansion
not expandable	microSDXC up to 1024 GB
OS
Android (14, 13, 12, 11)	Android (9.0 Pie)

PhoneArena Performance Test

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

Learn more on our PhoneArena Performance Test Results page.

Battery

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

PhoneArena Battery Tests

Battery Life Estimate

6h 15min

Browsing

14h 43min

Video

8h 52min

Gaming

8h 40min

Battery Life Estimate

Untested

Browsing

Untested

Video

Untested

Gaming

Untested

Learn more on our PhoneArena Battery Test Results page

Camera

Rear
Quad camera	Single camera
Main camera
108 MP (OIS, Laser and PDAF) Aperture size: F1.8 Focal length: 24 mm Sensor size: 1/1.33" Pixel size: 0.8 μm	5 MP
Second camera
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
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
LED
Video recording
8K UHD (24 fps), 4K UHD (60 fps), 1080p (240 fps), 720p (960 fps) OIS, HDR, Hyperlapse, Video light, EIS	720p
Front
40 MP (PDAF, HDR) Video capture: 4K UHD (60 fps)	2 MP Video capture: 720p

Connectivity & Features

Bluetooth
5.1	5.0
WLAN
a,b,g,n,ac,Wi-Fi 6,dual-band MIMO, Wi-Fi Direct, Hotspot 802.11 a, b, g, n, ac, ax	a,b,g,n,ac,dual-band Wi-Fi Direct 802.11 a, b, g, n, ac
USB
Type-C, USB 3.2	Type-C, USB 2.0
Sensors
Accelerometer, Gyroscope, Compass, Hall (for flip covers), Barometer, Ambient light sensor, Proximity sensor	Accelerometer, Ambient light sensor
Hearing aid compatible
M3/T3
Location
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning	GPS, A-GPS
Other
NFC, ANT+	Tethering, Computer sync, OTA sync

Discover more

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

Full Specs Amazon Fire HD 10 Plus (2021) Specs

Multimedia

Headphones
No 3.5mm jack	3.5mm jack
Speakers
Earpiece, Multiple speakers	Multiple speakers
Features
32-Bit DAC, Dolby Atmos, aptX, Dolby Digital, Dolby Digital Plus	Dolby Atmos, Album art cover, Background playback
Screen mirroring
	Wireless screen share
Additional microphone(s)
	Video recording

Cellular

5G Bands
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, 13, 14, 18, 19, 20, 25, 26, 28, 30, 66, 71
4G (TDD) Bands
38, 39, 40, 41, 46, 48
3G Bands
1, 2, 4, 5, 8
Data Speed
LTE-A Pro Cat 20 (2000/150 Mbit/s)
SIM type
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 256GB storage

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

With 64GB internal storage

Memory	64GB

with 512GB storage

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

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