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Get the key specs, technical data, ratings and full review of Samsung Galaxy A21s (RAM 4 GB) all in one place. Compare your selected model with other alternatives and give your decision on the best phone a solid base with our comprehensive overview.
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DESIGN AND DIMENSIONS Samsung Galaxy A21s (RAM 4 GB) |
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Product Type | Smartphone | |
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Manufacturer Model Number | SM-A217F/DSN | |
Form Factor | Touch | |
Height | 163.7 mm | Better than 94 % of phones rated. |
Width | 75.3 mm | Better than 80 % of phones rated. |
Depth | 8.9 mm | Better than 66 % of phones rated. |
Weight | 192 g | Worse than 86 % of phones rated. |
Body Colour | Silver | |
Waterproof (Water-resistant) | - | |
SAR Value | 1.544 W/kg (body), 0.422 W/kg (head), 2.21 W/kg (limb) | |
Connector Type |
USB Type-C - 24 pin USB-C Headset jack - mini-phone 3.5mm |
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SIM Card Type (Size) | Nano SIM | |
SIM Card Qty | Dual-SIM |
The Samsung Galaxy A21s (RAM 4 GB) has dimensions 163.7 mm × 75.3 mm × 8.9 mm. Its weight is 192 g.
Show moreDISPLAY Samsung Galaxy A21s (RAM 4 GB) |
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Display Type | LCD display | |
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Display Technology | PLS TFT | |
Screen Size (Display Size) | 6.5" | Better than 91 % of phones rated. |
Screen Resolution (Display Resolution) | 1600 x 720 pixels | Better than 69 % of phones rated. |
Display Format | HD+ | |
Colour Depth | 16.7 million colours | Better than 98 % of phones rated. |
Display Features | Infinity O display |
The screen size reaches 6.5" inches. With a large display, phone offers a great experience for watching videos, playing games and reading. The best phones today are 6.5'' or more. They have the advantage of a large display area that allows you to see more content than with conventional display sizes. LCD displays are currently taking a back seat. This is mainly due to higher power consumption. In addition, they have the disadvantage of lower colour contrast, which can be reflected e.g. in the resulting photos. On the other hand, phones with LCD displays are in general cheaper than those with OLED technology.
Display Resolution of Samsung Galaxy A21s (RAM 4 GB) is 1600 x 720 pixels. A higher display resolution is a prerequisite for a sharper image. The standard for mid-range phones today is a Full HD resolution of 1920 × 1080 px. Cheaper phones, which usually have a smaller diagonal, have an HD resolution of 1280 × 720 px. Smaller resolutions can only be found in older models. Best phones, on the other hand, have a 4K resolution of 3840 x 2160 px.
PROCESSOR Samsung Galaxy A21s (RAM 4 GB) |
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Clock Speed | 2 GHz | Better than 70 % of phones rated. |
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Processor Core Qty | 8-core | Better than 99 % of phones rated. |
The number of processor cores is 8. It is a number of cores that plays an important role in evaluating the performance of phone as it is responsible for computing operations. Smartphones already commonly have a core count of around 4 to 8. Multi-core processors can perform better and reduce the processing time of a request to a minimum, which is reflected in the responsiveness of the phone, e.g. in the speed of opening applications. Another important parameter is the processor frequency, which indicates how many instructions the phone can process in one second. Similar to refresh rate, the higher the number, the faster the phone responds. Processor frequency of phone Samsung Galaxy A21s (RAM 4 GB) is 2 GHz. As standard today, you'll find this value between 1.8 GHz and 2.8 GHz.
Show moreMEMORY Samsung Galaxy A21s (RAM 4 GB) |
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RAM | 4 GB | Better than 78 % of phones rated. |
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Internal Memory Size (Storage Capacity) | 32 GB | Better than 62 % of phones rated. |
User Memory | 19.5 GB | |
Supported Flash Memory Cards (Expandable Memory) | microSDHC, microSD, microSDXC - up to 512 GB |
One of the most important parameters for user´s decision is often internal memory capacity. The larger it is, the more apps, photos, movies and other files your phone can store. This phone has 32 GB storage. This memory capacity is ideal for those who have a few basic apps and a few dozen photos on their phone. If you don't expect to use your phone to play games or need to store high-resolution photos, this size should be sufficient. There is almost no probability you're likely to see this low capacity on new smartphones. The standard memory today is around 64 and 128 GB. The best phones have internal memory of 256 GB or more. Nowadays, you can usually find one phone model on the market with several different memory sizes. This allows each user to choose what suits them best.
For this model it is possible to increase the storage size by inserting a memory card.
Size of the RAM memory tells us how powerful the phone is. Samsung Galaxy A21s (RAM 4 GB) is equipped with 4 GB. Commonly today you will find phones with 6 to 8 GB of RAM. This means that the phone can easily handle normal operation and more demanding applications or games. Higher RAM of 12 GB can be found in best phones on market and are ideal especially for avid gamers. On the other hand, operating memory below 4 GB is more of an issue with lower-end phones and older models. However, even they will find their fans among less demanding users, who don´t want to spend much on buying new phone.
CAMERA Samsung Galaxy A21s (RAM 4 GB) |
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MAIN CAMERA |
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Number of Main Cameras | 4 | |
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Sensor Resolution | 48 Megapixel | Better than 93 % of phones rated. |
Lens Type | Wide-angle lens | |
Lens Aperture | F/2.0 | Worse than 52 % of phones rated. |
Field of View (FoV) | 80 degree(s) | Better than 56 % of phones rated. |
Focus Adjustment | Automatic | |
Digital Zoom | 8x | Better than 79 % of phones rated. |
Camera Modes | Live Focus mode | |
Light Source | LED flash | |
Video Resolutions | 1920 x 1080 (1080p) at 30 fps |
SECOND CAMERA |
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Sensor Resolution (2nd Camera) | 8 Megapixel | Better than 50 % of phones rated. |
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Lens Type (2nd Camera) | Ultra wide-angle lens | |
Lens Aperture (2nd Camera) | F/2.2 | Better than 87 % of phones rated. |
Field of View (2nd Camera) | 123 degree(s) | Better than 97 % of phones rated. |
THIRD CAMERA |
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Sensor Resolution (3rd Camera) | 2 Megapixel | Worse than 61 % of phones rated. |
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Lens Aperture (3rd Camera) | F/2.4 | Better than 76 % of phones rated. |
Camera Functions (3rd Camera) | Macro camera | |
Camera Features (3rd Camera) | 4cm macro photography |
FOURTH CAMERA |
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Sensor Resolution (4th Camera) | 2 Megapixel | Better than 75 % of phones rated. |
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Lens Aperture (4th Camera) | F/2.4 | Better than 85 % of phones rated. |
Camera Functions (4th Camera) | Depth camera |
FRONT CAMERA |
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Number of Front Cameras | 1 | |
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Sensor Resolution (Front) | 13 Megapixel | Better than 80 % of phones rated. |
Lens Aperture (Front) | F/2.2 | Better than 51 % of phones rated. |
Focus Adjustment | Focus free |
The rear camera of the phone Samsung Galaxy A21s (RAM 4 GB) has 4 lenses. Today's modern phones usually have several rear lenses. The most common are macro lens, telephoto lens and wide-angle lens. Each is used to capture the perfect photo - macro lens is designed for close-up photography, telephoto lens, often equipped with an optical zoom, is for photos of objects in distance, and wide-angle lens captures larger areas where you need a wider field of view. The main lens is designed as Wide-angle lens. The resolution of main lens is 48 Megapixel. Nonetheless, resolution alone does not necessarily mean a good photo. Therefore, you should look at other parameters such as lens aperture or pixel size. Another important factor is the aperture, which in this case is F/2.0 and determines how much light passes through the sensor. Best phones have an aperture of up to F/1.5. But the most common lenses today are F/1.8 to F/2.2. In this case, the lower the number after the slash, the higher the photo quality.
Digital zoom in this case offers zooming up to 8x. Of course, the higher the lens value, the more distant object can be zoomed in. Nonetheless, the disadvantage of digital zoom is that the quality and sharpness of photo deteriorates when using it.
Second camera
The second lens of rear camera is designed as Ultra wide-angle lens. The field of view of second lens reaches 123 degree(s). The resolution reaches size of 8 Megapixel. In addition, this lens also features lens aperture of F/2.2.
Third camera
The resolution of third lens is then 2 Megapixel. The aperture reaches size of F/2.4.
Fourth camera
The resolution of fourth rear camera reaches 2 Megapixel. Lens aperture value then reaches F/2.4.
Front camera
The front camera of phone Samsung Galaxy A21s (RAM 4 GB) has one lens. This number of lenses is standard on most smartphones nowadays. The lens is equipped with 13 Megapixel. However, do not forget there are other factors than resolution having impact on the final quality of front camera photos. The main front lens also achieves F/2.2.
BATTERY AND CHARGING Samsung Galaxy A21s (RAM 4 GB) |
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Battery Capacity (Battery Size) | 5000 mAh | Better than 99 % of phones rated. |
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Talk Time | 3240 minutes | Better than 99 % of phones rated. |
Run Time Details |
Active online usage (4G): up to 23 hrs Active online usage (Wi-Fi): up to 23 hrs Playback (video): up to 21 hrs Playback (audio): up to 109 hrs Talk (4G): up to 3240 min |
The battery size of Samsung Galaxy A21s (RAM 4 GB) is 5000 mAh. Nevertheless, battery capacity is not the only factor that affects the phone's battery life. For example - the size of the display, the performance of the processor, the use of data functions and, of course, the intensity of use of phone in general all have a significant impact on battery life. Standard for most smartphones today is a battery capacity of around 4500 to 5000 mAH. Phones with this battery size usually guarantee a phone life of at least 1 day. Older or cheaper smartphone models can then reach battery capacities typically around 2500 mAH and below. With this capacity, you may find that if you use your phone heavily, you may need to recharge your phone during the day. The phone Samsung Galaxy A21s (RAM 4 GB) will last one charge with constant phone calls 3240 minutes.
Show moreCELLULAR Samsung Galaxy A21s (RAM 4 GB) |
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Technology | WCDMA (UMTS) / GSM | |
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Mobile Broadband Generation | 4G | Better than 88 % of phones rated. |
Navigation | GPS, GLONASS, BeiDou, Galileo |
Standard 4G connectivity is currently being replaced by 5G, but is still the preserve of the latest phones. Samsung Galaxy A21s (RAM 4 GB) supports 4G. 3G connectivity is now only found in the oldest phones.
Show moreCOMMUNICATIONS Samsung Galaxy A21s (RAM 4 GB) |
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Data Transmission | FDD-LTE, TDD-LTE | |
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2G Band | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | |
3G UMTS Band | Band 1, Band 2, Band 5, Band 8 | |
3G UMTS Frequency | 2100, 1900, 850, 900 | |
4G LTE Band | Band 1, Band 2, Band 3, Band 5, Band 7, Band 8, Band 20, Band 28, Band 38, Band 40, Band 41 | |
4G LTE Frequency | FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 850, FDD 2600, FDD 900, FDD 800 DD, FDD 700 APT, TDD 2600, TDD 2300, TDD 2500 | |
Wireless Interface | IEEE 802.11a/b/g/n/ac | |
Bluetooth | Bluetooth 5.0 LE | |
NFC | Yes | Better than 66 % of phones rated. |
Contactless payments are not a problem with this phone, thanks to NFC function. It can also be used, for example, to unlock doors or load menus in a restaurant using an NFC tag. Bluetooth 5.0 LE must not be missing from the basic package. It makes it easy to connect wireless headphones to your phone, connect your phone to your TV, tablet, speaker and more.
Show moreMEDIA Samsung Galaxy A21s (RAM 4 GB) |
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Supported Digital Audio Standards | WAV, WMA, AAC, AMR, MP3, FLAC, XMF, OGG, MIDI, M4A, MXMF, OGA, 3GA, AWB, IMY, RTTTL, RTX, OTA, MID | |
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Supported Digital Video Standards | MKV, FLV, AVI, WMV, ASF, 3GP, M4V, WebM, 3G2, MP4 |
FEATURES Samsung Galaxy A21s (RAM 4 GB) |
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Phone Functions | Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert | |
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Sensors | Accelerometer, proximity sensor, gyro sensor, geomagnetic sensor | |
Security Devices | Face recognition, fingerprint reader | |
Additional Phone Features | Samsung KNOX, Virtual Light Sensing |
OTHERS Samsung Galaxy A21s (RAM 4 GB) |
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Included Accessories | Power adapter |
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