Kyocera K342 vs Samsung Galaxy S21 Ultra vs Samsung Galaxy S25 Specs Comparison

Display

Size
	6.8-inch	6.2-inch
Resolution
160 x 128 px	3200 x 1440 px, 20:9 ratio, 516 PPI	2340 x 1080 px, 19.5:9 ratio, 416 PPI
Technology
TFT	Dynamic AMOLED	Dynamic AMOLED
Refresh rate
	120Hz (adaptable)	120Hz
Screen-to-body
	89.33 %	78.65 %
Colors
65 536
Peak brightness
	1500 cd/m2 (nit)	2600 cd/m2 (nit)
Features
	HDR support, Scratch-resistant glass (Corning Gorilla Glass Victus), Ambient light sensor, Proximity sensor	HDR support, Scratch-resistant glass (Corning Gorilla Glass Victus 2), Ambient light sensor, Proximity sensor
Additional display
64 x96 px, STN

Hardware

System chip
	Qualcomm Snapdragon 888 SM8350 (5 nm)	Qualcomm Snapdragon 8 Elite SM8750-AB (3 nm)
Processor
	Octa-core, 1x 2.84GHz Kryo 680 + 3x 2.42GHz Kryo 680 + 4x 1.80GHz Kryo 680, 64-bit	Octa-core, 2x 4.47GHz Oryon V2 Phoenix L + 6x 3.53GHz Oryon V2 Phoenix M
GPU
	Adreno 660	Adreno 830
RAM
	12GB (LPDDR5)	12GB (LPDDR5X)
Internal storage
	128GB (UFS 3.1), not expandable	128GB (UFS 4.0), not expandable
OS
	Android (14, 13, 12, 11), One UI	Android (15), One UI
Device type
	Smartphone	Smartphone

Battery

Capacity
1000 mAh	5000 mAh	4000 mAh
Type
Li - Ion, User replaceable	Li - Polymer, Not user replaceable	Li - Ion, Not user replaceable
Charging
	Qualcomm Quick Charge 2.0, USB Power Delivery, Samsung Adaptive Fast Charging, Qi and Powermat wireless charging, Reverse wireless charging	Fast charging, Qi wireless charging, Reverse wireless charging
Max charge speed
	Wired: 25.0W Wireless: 15.0W	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

Battery Life Estimate

7h 6min

Browsing

18h 29min

Video

8h 1min

Gaming

12h 20min

Find out more details about battery and charging for all phones we have tested on our PhoneArena Battery Score page.

Camera

Rear
Single camera	Quad camera	Triple camera
Main camera
1.3 MP (Autofocus)	108 MP (OIS, Laser and PDAF) Specifications: Aperture size: F1.8 Focal length: 24 mm Sensor size: 1/1.33" Pixel size: 0.8 μm	50 MP (OIS, PDAF) Specifications: Aperture size: F1.8 Focal length: 24 mm Sensor size: 1/1.56" Pixel size: 1.0 μm
Second camera
	10 MP (Telephoto, Periscope, OIS, PDAF) Specifications: Optical zoom: 10.0x Aperture size: F4.9 Focal Length: 240 mm Sensor size: 1/3.2" Pixel size: 1.22 μm	10 MP (Telephoto, OIS) Specifications: Optical zoom: 3.0x Aperture size: F2.4 Focal Length: 67 mm Sensor size: 1/3.94" Pixel size: 1.0 μm
Third camera
	10 MP (Telephoto, OIS, PDAF) Specifications: Optical zoom: 3.0x Aperture size: F2.4 Focal Length: 70 mm Sensor size: 1/3.2" Pixel size: 1.22 μm	12 MP (Ultra-wide) Specifications: Aperture size: F2.2 Focal Length: 13 mm Sensor size: 1/2.55" Pixel size: 1.4 μm
Fourth camera
	12 MP (Ultra-wide, PDAF) Specifications: Aperture size: F2.2 Focal Length: 13 mm Sensor size: 1/2.55" Pixel size: 1.4 μm
Flash
Yes	LED	LED
Video recording
Yes	7680x4320 (8K UHD) (24 fps), 3840x2160 (4K UHD) (60 fps), 1920x1080 (Full HD) (240 fps), 1280x720 (HD) (960 fps) Features: OIS, HDR, Hyperlapse, Video light, EIS	7680x4320 (8K UHD) (30 fps), 3840x2160 (4K UHD) (60 fps), 1920x1080 (Full HD) (240 fps) Features: HDR, Continuous autofocus, Picture-taking during video recording
Front
	40 MP (PDAF, HDR), Video capture: 3840x2160 (4K UHD) (60 fps)	12 MP (HDR), Video capture: 3840x2160 (4K UHD) (60 fps)

PhoneArena Camera Tests

N/A

Overall

N/A

Photo

N/A

Video

N/A

Overall

N/A

Photo

N/A

Video

147

Overall

151

Photo

142

Video

Find out more details about photo and video scores for all phones we have tested on our PhoneArena Camera Score page.

Design

Dimensions
3.54 x 1.81 x 0.92 inches (90 x 46 x 23.5 mm)	6.50 x 2.98 x 0.35 inches (165.1 x 75.6 x 8.9 mm) thickness with camera 0.37 inches (9.4 mm)	5.78 x 2.78 x 0.28 inches (146.9 x 70.5 x 7.2 mm) thickness with camera 0.33 inches (8.45 mm)
Weight
3.40 oz(96.0 g)	8.04 oz(229.0 g)	5.71 oz(162.0 g)
Materials
	Back: Glass (Corning Gorilla Glass Victus) Frame: Aluminum	Back: Glass (Corning Gorilla Glass Victus 2) Frame: Aluminum
Resistance
	Water, Dust; IP68	Water, Dust; IP68
Biometrics
	2D Face unlock, Ultrasonic in-screen fingerprint	Ultrasonic in-screen fingerprint
Features
Numeric keypad, Soft keys
Keys
Left: Volume control, Camera shutter	Right: Volume control, Lock/Unlock key	Right: Volume control, Lock/Unlock key
Colors
	Phantom black, Silver	Icy Blue, Mint, Navy, Silver Shadow

Cellular

5G
	Bands n2, n5, n12, n25, n41, n66, n71, n77, n260, n261, SA, NSA, Sub-6, mmWave	Bands n1, n2, n5, n7, n25, n28, n41, n66, n71, n258, n260, n261, SA, NSA, Sub-6, mmWave, 5G Ready
4G (FDD)
	Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 13(700 c), 14(700 PS), 18(800 Lower), 19(800 Upper), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 30(2300 WCS), 66(AWS-3), 71(600)	Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 13(700 c), 14(700 PS), 19(800 Upper), 20(800 DD), 25(1900+), 28(700 APT), 30(2300 WCS), 71(600)
4G (TDD)
	Bands 38(2600), 39(1900+), 40(2300), 41(2600+), 46, 48(3600)	Bands 38(2600), 39(1900+), 40(2300), 41(2600+)
3G
	Bands 1(2100), 2(1900), 4(1700/2100), 5(850), 8(900)	Bands 1(2100), 2(1900), 4(1700/2100), 5(850), 8(900)
Data Speed
	LTE-A Pro Cat 20 (2000/150 Mbit/s)	LTE-A Pro Cat 20 (2000/150 Mbit/s)
SIM type
	Nano SIM	Nano SIM, eSIM

Multimedia

Headphones
2.5mm jack	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
Screen mirroring
	Wireless screen share	Wireless screen share
Radio
	FM, Stereo, RDS
Additional microphone(s)
	Noise cancellation, Video recording	Noise cancellation

Connectivity & Features

Bluetooth
1.2	5.1	5.4
Wi-Fi
	802.11 a,b,g,n,ac,ax(Wi-Fi 6),dual-band MIMO, Wi-Fi Direct, Hotspot	802.11 a,b,g,n,ac,ax(Wi-Fi 6),Wi-Fi 6E,Wi-Fi 7 Wi-Fi Direct, Hotspot
USB
	Type-C (reversible), USB 3.2, Features: Charging, Headphones port, OTG, Video out	Type-C (reversible), USB 3.2, Features: Charging, OTG
Hearing aid compatible
	M3/T3	M3/T4
Location
A-GPS	GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning	GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
Sensors
	Accelerometer, Gyroscope, Compass, Hall (for flip covers), Barometer	Accelerometer, Gyroscope, Compass, Barometer
Other
Computer sync	NFC, ANT+	NFC, Ultra Wideband (UWB)

Regulatory Approval

FCC approval
	Date approved: Dec 22, 2020 FCC ID value: A3LSMG998U	Date approved: Nov 26, 2024 FCC ID value: A3LSMS931U
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	Head: 1.13 W/kg Body: 0.81 W/kg Simultaneous Transmission: 1.08 W/kg

Buyers information

MSRP
	$ 1200 / € 1399	$ 799 / € 899
In The Box
	C to C Data Cable, Ejection Pin	USB-C cable, SIM ejector tool, Paperwork

Availability

Officially announced
Apr 05, 2006	Jan 14, 2021	Jan 22, 2025

Alternative variants

with 256GB storage

Internal storage	256GB
Colors	Phantom black
MSRP	$ 1250

With 256GB internal storage

Internal storage	256GB
MSRP	$ 860

with 512GB storage

RAM	16GB
Internal storage	512GB
Colors	Phantom black
MSRP	$ 1380

With 512GB internal storage

Internal storage	512GB

for Europe

System chip	Samsung Exynos 2100 (5 nm)
Processor	Octa-core, 1x 2.91GHz Cortex-X1 + 3x 2.81GHz Cortex-A78 + 4x 2.2GHz Cortex-A55, 64-bit
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

Links

Full specifications
Kyocera K342 Specs	Samsung Galaxy S21 Ultra Specs	Samsung Galaxy S25 Specs
PhoneArena Review
	Samsung Galaxy S21 Ultra Review	Samsung Galaxy S25 Review
User Reviews
	Samsung Galaxy S21 Ultra User Reviews