Samsung Galaxy S21 was released on January 29, 2021, as the predecessor of the previous Samsung Galaxy S20.
[Credit: Amazon]
Samsung Galaxy S21
The Samsung Galaxy S21 is not being produced by Samsung; you can buy a renewed version on Amazon for $289. The Samsung Galaxy S21 is the predecessor of the previous Samsung Galaxy S20. It has two other siblings, which are S21+ and the S21 ultra, and a special model S21 FE, which was released in January 2022, and you can find a renewed version on Amazon for about $154.
The most noticeable change is the design; Samsung has the camera bump bigger, which blends with the phone very properly. The plastic back has a very good finish; it is not low-quality plastic. The plastic used by Samsung is of very high quality. It has a 6.2-inch AMOLED Infinity Flex display with an ultrasonic fingerprint scanner. The Samsung Galaxy S21 is very well made.
The S21 comes with a 2.4 GHZ Octa-core processor. The S21 has a screen resolution of 2400x1080 with a max refresh rate of 120HZ and unlike its pricier sibling, it's not compatible with a S-pen. The S21 offers 8GB of RAM with two storage options: 128GB and 256GB. It also has cool features like the circle to search, which is highly usable and can easily help find stuff online. Another cool feature is the generative ai which can easily edit your photos.
The S21 comes with a 12 MP, 26 mm wide and ultra-wide camera, a 64 MP telephoto camera, and a 10MP front camera. It can record 8K video with 24fps, 4K video with 60fps, and a 1080p video with up to 240fps.
People have claimed that they had taken clear photos of the moon from their Samsung Galaxy S21. Samsung has said that the photos of the moon taken from the S21 are cleared by Artificial Intelligence, which is a built-in feature in the Samsung Galaxy S21.
The Camera hardware in the S21 is the same as in the S20, but Samsung has made some improvements in it; it's not a bad thing; they are just improving their technology in their phones.
The Samsung Galaxy S21 offers a 4000 Mah lithium-ion battery, which is the same as the Samsung Galaxy S20. It uses a 25-watt USB-C charger for fast charging. After testing it, I observed that it lasts up to 25 hours on normal usage, and on standby, it can last up to 270 hours. I also ran single-core and multicore Geekbench tests on the Samsung Galaxy S20 and the S21; in both tests, the S21 won easily.
The S21 was released with Android 11 and uses Samsung Knox for enhanced factory data reset protection. And at release samsung said that it will receive software updates for four years and security updates for five years.
The S21 received its last software update, Android 1,5 in early 2025 and received its last security update in November 2025. The S21 is not in the February 2026 security update lineup. Samsung has officially ended its software and security updates. But if the S21 has some critical problems, Samsung is open to releasing some updates.
The Samsung Galaxy is an affordable phone, and people can still use it; they don’t have to spend more money on the latest phones. It is a good phone with a good design, screen, battery life, and a good camera. People who want to buy a phone with good specs that are not too high, are just ok, then the Samsung Galaxy S21 is the best option for them.
Ques1- How old is the Samsung S21?
Ans- The Samsung S21 is Approx five years old as of early 2026.
Ques2- Is S21 or S23 better?
Ans- The S23 is better than S21.
Ques3- Is S21 end of life?
Ans- Yes, the S21 has reached its official end of life.
Ques4- Which S21 is the best?
Ans- The S21 Ultra is the best.
Ques5- How long does an S21 battery last?
Ans- It can last approx. a day.
Design
The most noticeable change is the design; Samsung has the camera bump bigger, which blends with the phone very properly. The plastic back has a very good finish; it is not low-quality plastic. The plastic used by Samsung is of very high quality. It has a 6.2-inch AMOLED Infinity Flex display with an ultrasonic fingerprint scanner. The Samsung Galaxy S21 is very well made.
Hardware
The S21 comes with a 2.4 GHZ Octa-core processor. The S21 has a screen resolution of 2400x1080 with a max refresh rate of 120HZ and unlike its pricier sibling, it's not compatible with a S-pen. The S21 offers 8GB of RAM with two storage options: 128GB and 256GB. It also has cool features like the circle to search, which is highly usable and can easily help find stuff online. Another cool feature is the generative ai which can easily edit your photos.
Camera
The S21 comes with a 12 MP, 26 mm wide and ultra-wide camera, a 64 MP telephoto camera, and a 10MP front camera. It can record 8K video with 24fps, 4K video with 60fps, and a 1080p video with up to 240fps.
People have claimed that they had taken clear photos of the moon from their Samsung Galaxy S21. Samsung has said that the photos of the moon taken from the S21 are cleared by Artificial Intelligence, which is a built-in feature in the Samsung Galaxy S21.
The Camera hardware in the S21 is the same as in the S20, but Samsung has made some improvements in it; it's not a bad thing; they are just improving their technology in their phones.
Battery
The Samsung Galaxy S21 offers a 4000 Mah lithium-ion battery, which is the same as the Samsung Galaxy S20. It uses a 25-watt USB-C charger for fast charging. After testing it, I observed that it lasts up to 25 hours on normal usage, and on standby, it can last up to 270 hours. I also ran single-core and multicore Geekbench tests on the Samsung Galaxy S20 and the S21; in both tests, the S21 won easily.
Software
The S21 was released with Android 11 and uses Samsung Knox for enhanced factory data reset protection. And at release samsung said that it will receive software updates for four years and security updates for five years.
The S21 received its last software update, Android 1,5 in early 2025 and received its last security update in November 2025. The S21 is not in the February 2026 security update lineup. Samsung has officially ended its software and security updates. But if the S21 has some critical problems, Samsung is open to releasing some updates.
Conclusion
The Samsung Galaxy is an affordable phone, and people can still use it; they don’t have to spend more money on the latest phones. It is a good phone with a good design, screen, battery life, and a good camera. People who want to buy a phone with good specs that are not too high, are just ok, then the Samsung Galaxy S21 is the best option for them.
FAQs
Ques1- How old is the Samsung S21?
Ans- The Samsung S21 is Approx five years old as of early 2026.
Ques2- Is S21 or S23 better?
Ans- The S23 is better than S21.
Ques3- Is S21 end of life?
Ans- Yes, the S21 has reached its official end of life.
Ques4- Which S21 is the best?
Ans- The S21 Ultra is the best.
Ques5- How long does an S21 battery last?
Ans- It can last approx. a day.
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