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Galaxy A25
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Galaxy S21 Ultra
Company ProductName Specs

What we think

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The PerfectRec phone team Learn more
Updated February 23, 2024·

If you prioritize camera quality and are willing to pay more, the Samsung Galaxy S21 Ultra has a better overall camera experience, with high-quality photos and videos, versatility, and features like a telephoto lens with significant optical zoom. On the other hand, if you want to spend less and are okay with basic photography, the Samsung Galaxy A25 offers a less impressive camera setup suitable for casual use. The S21 Ultra also offers a larger, higher resolution screen, more advanced processor, and longer battery life, making it a better choice for heavy usage, gaming, and media consumption. However, the A25 still provides good quality with its OLED screen and decent performance for everyday tasks at a more budget-friendly price. Both phones have the same storage capacity and the Android operating system. Give Feedback

this description is based on the product variant with some specs and product variant with some specs. At the time of writing, the variant with some specs cost some dollars and the variant with some specs cost some dollars.
Advantages of the Samsung Galaxy A25
  • The Samsung Galaxy A25 has no clear advantages over the Samsung Galaxy S21 Ultra.
Advantages of the Samsung Galaxy S21 Ultra
  • Good for taking photos
  • Good for recording videos
  • Very good display quality
  • Good performance

Key differences

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Overall Camera Quality

Galaxy A25
Galaxy S21 Ultra
The Samsung Galaxy A25 has poor overall camera quality, while the Samsung Galaxy S21 Ultra has good overall camera quality.

Photo Quality

Galaxy A25
Galaxy S21 Ultra
The Samsung Galaxy A25 takes poor photos, while the Samsung Galaxy S21 Ultra takes good photos.

Video Quality

Galaxy A25
Galaxy S21 Ultra
The Samsung Galaxy A25 takes poor videos, while the Samsung Galaxy S21 Ultra takes good videos.


8.7 Hours
Galaxy A25
Galaxy S21 Ultra
6.7 Hours
The Samsung Galaxy A25 has 8.7 hours of battery life. The Samsung Galaxy S21 Ultra has 6.7 hours of battery life.


Galaxy A25
Galaxy S21 Ultra
Product image
Product image








The Samsung Galaxy A25 has a price of $300 and the Samsung Galaxy S21 Ultra costs $423.
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Key similarities

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Screen Size

The Samsung Galaxy A25 has a screen size of 6.5 inches and the Samsung Galaxy S21 Ultra is 6.8 inches.

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How the Samsung Galaxy A25 and the Samsung Galaxy S21 Ultra compare to other phones

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Spec Comparison

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Samsung Galaxy A25Samsung Galaxy S21 Ultra
Samsung Galaxy A25Samsung Galaxy S21 Ultra


Operating System
Release Date
January 1, 2024January 29, 2021


Screen Size
2340 x 10803200 x 1440
Variable refresh rate
Pixels Per Inch
Display Type


Internal Storage
128 GB128 GB
6 GB12 GB


Overall Camera Quality Score
Photos Score
Videos Score
Rear Cameras
Main, Ultrawide, MacroMain, Ultrawide, Telephoto, Super Telephoto
Main Camera
50 megapixels + OIS108 megapixels + OIS


Battery Life
8.7 Hours6.7 Hours
Battery Capacity
5000 mAh5000 mAh
Wireless Charging
Wireless charging Speed
15 W15 W
Reverse wireless charging
Yes (4.5 watts)Yes (4.5 watts)


6.34" x 3.01"6.5" x 2.98"
6.95 oz8.01 oz
Back Material
Stereo Speakers


Dual SIM
Bluetooth Version
WiFi Version
US 5G Bands
(SA/NSA/Sub6)1, 3, 5, 7, 8, 26, 28, 40, 41, 66, 77, 78(SA/NSA/Sub6/mmWave)2, 5, 25, 41, 66, 71, 260, 261 (SA/NSA/Sub6)1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 77, 78


Biometric unlock
Face unlock, Fingerprint sensor: SideFace unlock, Fingerprint sensor: Under Display
Unlockable Bootloader
Blue BlackPhantom Black, Phantom Silver, Phantom Navy, Phantom Titanium
Stock Android
SD Card


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Samsung Galaxy S21 Ultra

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Dig into reviews and images

Android Authority

David Imel | January 2023
"The Galaxy S21 Ultra is a killer combo of great design, blazing-fast performance, a wonderful display, long-lasting battery life, and one of the most versatile camera systems you can get in a smartphone today."

Get a great deal on the Samsung Galaxy A25 or the Samsung Galaxy S21 Ultra

About Samsung

Samsung is one of the most recognizable names in the smartphone industry, standing as the undisputed best-selling brand of Android smartphones in the United States for many years now. Samsung is known for offering a variety of smartphones in all available price points, as well as for implementing cutting-edge technology and innovative features in their flagship devices, ones that often shape the market going forward. The company offers its own unique spin on Android, called One UI, which focuses on offering a multitude of features and is heavily customizable, according to user preference.

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Why trust us

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This information was produced and vetted by the PerfectRec phones team. We are a product research and recommendation organization that meticulously reviews and evaluates the latest phone information and makes it digestible for you.

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Joe Golden, Ph.D

CEO and Phones Editor
Joe is an entrepreneur and lifelong electronics enthusiast with a Ph.D in Economics from the University of Michigan.

Jason Lew

Staff Expert & Software Engineer
Jason is a staff expert and software engineer that has been making laptop recommendations for 7 years and moderates one of the largest laptop subreddits.

Chandradeep Chowdhury

Staff Expert & Software Engineer
Chandradeep is a staff expert and software engineer and expert in televisions and monitors. He’s been making monitor recommendations for ten years.

Seth Peoples

Phones Expert
Seth is a US-based product expert focusing on smartphones and he is a moderator of one of the largest smartphone subreddits. His tailored recommendations have helped him earn over 87k comment karma, putting him in the top 1% of Redditors.

Efthimis Kotanidis

Phones Expert
Efthimis is a Greece-based product expert focusing on smartphones. He has been recommending phones for 4 years and his recommendations on Reddit have earned him over 35k karma.

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