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Asus Zenfone 5Z (ZS620KL 128GB) vs Samsung Galaxy A21s (SM-A217M)

Side by side comparison between Asus Zenfone 5Z vs Samsung Galaxy A21s phones, differences, pros, cons with full specifications. What's the better?

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Compare Samsung Galaxy A21s XAsus Zenfone 5Z (ZS620KL 128GB)19Points
Asus Zenfone 5Z (ZS620KL 128GB)
6.2"
IPS

1080x2246

12
MP

8mp

6GB
RAM

64bit Octa

3300
mAh

(Non removable)

vs
05PointsSamsung Galaxy A21s (SM-A217M)Compare Asus Zenfone 5Z X
Samsung Galaxy A21s (SM-A217M)
6.5"
PLS

720x1600

48
MP

13mp

4GB
RAM

64bit Octa

5000
mAh

(Non removable)

What's the better phone? Asus Zenfone 5Z (ZS620KL 128GB)

The phonemore's choice is much more technical than personal. Therefore, you shouldn't only consider this. Our goal is to help you, but what's important to us may not be important to you. You decide which one is the best! Comment!

Zenfone 5Z (ZS620KL 128GB)19 Advantages Asus Zenfone 5Z (ZS620KL 128GB)vsGalaxy A21s (SM-A217M)5 Advantages Samsung Galaxy A21s (SM-A217M)
+6GB LPDDR4X50%
More RAM memory. Typically more responsive and better for multitasking.
vs4GB LPDDR4X
+128GB (111GB available)131%
More internal storage for applications and files
vs64GB (48GB available)
+UFS 2.1Advantage
Fastest write and read storage.
vseMMC 5.1
+165 grams (5.78 ounces)16%
Lighter
vs192 grams (6.72 ounces)
+7.9 millimeters (0.31 inches)13%
Thinner
vs8.9 millimeters (0.35 inches)
+Aluminum frame, glass front/backAdvantage
More resistant material
vsPlastic body, glass front
+TFT IPS LCDAdvantage
TFT IPS LCD display is brighter and more vivid
vsTFT PLS
+1080x2246 pixels111%
Higher resolution screen
vs720x1600 pixels
+402 PPI49%
Crisper display of text, images and videos because it has more pixels per inch (ppi)
vs270 PPI
+Dual-LED flashAdvantage
The Dual-LED flash helps in dark places or in low light
vsLED flash
+OIS (4-axis): Optical stabilizationAdvantage
Image stabilization prevents blurry photos and helps in recording motion video
vsEIS: Digital stabilization
+f/1.8 (aperture)11%
Diaphragm opening (Aperture) of the camera which has the smallest F number takes photos with better light exposure.
vsf/2.0 (aperture)
+4K UHD (3840x2160)3 times
More image quality for recording videos with the primary camera
vsFull HD (1920x1080)
+(4G+ LTE-A) 1200 Mbps3 times
Faster for surfing the internet and download files
vs(4G+ LTE-A) 300 Mbps
+Ambient Light sensorAdvantage
Sensors help you use the device
vsNot supported
+18W20%
More power (watts) to charge the battery faster. Sometimes, the charger that comes with the device doesn't have the same power supported by the device. Check before you buy it.
vs15W
+2 slots (Dual-SIM)
(hybrid slot/shares the same microSD slot)Advantage
It's more advantageous to have more than one phone operator in the same device
vs1 slot (Single-SIM)
(dedicated slot)
+NFCAdvantage
NFC allows you to make payments by approach quickly and securely
vsNot supported
+Gorilla GlassAdvantage
Protection against scratches on the screen lets you carry your phone with your keys
vsNot supported
6.2"vs+6.5"5%
Larger screen
(dual camera) 12MP + 8MPvs+(quad camera) 48MP + 8MP + 2MP + 2MP2 times
Higher resolution main camera
1/2.55" inchesvs+1/2" inches28%
The larger sensor camera lets you take photos with better depth.
(front) 8MPvs+(front) 13MP60%
Higher resolution secondary camera to take pictures and selfies
3300 mAhvs+5000 mAh52%
Battery - higher amperage (mAh) allows more device usage time, but it also depends on the hardware and use

30 Common items in both devices
2.7Ghz 64bit Octa-Core
Until 1TB microSD, microSDXC / Until 512GB microSD, microSDXC
60Hz
16 million
Only digital zoom
PDAF: phase detection autofocus
HDR photo on both cameras
+23 specs and more in the table below

Check the comparison table below for more items that are not evaluated in comparison score above.

Highlight differencesClear highlight
Physical featuresAsus Zenfone 5Z (ZS620KL 128GB)Samsung Galaxy A21s (SM-A217M)
ModelZenfone 5Z (ZS620KL 128GB)Galaxy A21s (SM-A217M)
Other model namesAsus Zenfone 5z 6GB RAM, ASUS_Z01RDGalaxy A21s SM-A217M Single-Sim (64GB + 4GB RAM)
Country or region available(Global, International)
(Global, International)
(Latin America)Mexico
(Latin America), Mexico
BrandAsusSamsung
Release dateJune, 2018June, 2020
Depth7.9 millimeters (0.31 inches)8.9 millimeters (0.35 inches)
Size (width x height)75.65 x 153 millimeters (2.98 x 6.02 in)75.3 x 163.7 millimeters (2.96 x 6.44 in)
Weight165 grams (5.78 ounces)192 grams (6.72 ounces)
Qwerty physical keyboardNot supportedNot supported
AntennaInternal antennaInternal antenna
Build, materialsAluminum frame, glass front/backPlastic body, glass front
Protection against water and othersNot supportedNot supported
System (OS)Asus Zenfone 5Z (ZS620KL 128GB)Samsung Galaxy A21s (SM-A217M)
Operating systemAndroid 8.0 OreoAndroid 10
Firmware updateAndroid 10feature not registered
HardwareAsus Zenfone 5Z (ZS620KL 128GB)Samsung Galaxy A21s (SM-A217M)
Chipset64bit - Qualcomm Snapdragon 845 MSM8998 (10nm)64bit - Samsung Exynos 850 Octa (8nm)
CPU processorOcta-Core, 2 processors:
2.7Ghz Quad-Core Kryo 385 Gold
1.7Ghz Quad-Core Kryo 385 Silver
Octa-Core, 2 processors:
2Ghz Quad-Core ARM Cortex-A55
2Ghz Quad-Core ARM Cortex-A55
GPU graphical controllerQualcomm Adreno 630 710MhzARM Mali-G52 MP1
RAM memory6GB LPDDR4X4GB LPDDR4X
Internal storage128GB (111GB available)
UFS 2.1
64GB (48GB available)
eMMC 5.1
External storageUntil 1TB microSD, microSDXC
(hybrid slot/shares the same SIM-2 slot)
Until 512GB microSD, microSDXC
(dedicated slot)
DisplayAsus Zenfone 5Z (ZS620KL 128GB)Samsung Galaxy A21s (SM-A217M)
Display typeTFT IPS LCDTFT PLS
Screen size6.2" inches6.5" inches
Screen-to-body ratio~83.7% (screen-to-body ratio)~82.8% (screen-to-body ratio)
Display resolution1080x2246 pixels (18.7:9)720x1600 pixels (20:9)
TouchscreenCapacitive Multitouch 10-pointsCapacitive Multitouch
Pixel density (dot pitch)402 PPI270 PPI
Colors16 million16 million
Scratch-resistant glassGorilla GlassNot supported
Display features60Hz, 550 nits60Hz
Mobile networksAsus Zenfone 5Z (ZS620KL 128GB)Samsung Galaxy A21s (SM-A217M)
Dual-SIMDual-SIM Standby - Call active on one sim card
(hybrid slot/shares the same microSD slot)
Not supported
SIM card2 slots (Dual-SIM)
nano-SIM (4FF)
1 slot (Single-SIM)
nano-SIM (4FF)
Maximum download/upload1200/100 Mbps300/150 Mbps
Network technology2G, 3G, 4G2G, 3G, 4G
Frequency, bandsExpand band detailsCollapse details
GSM Mhz bandQuad-Band 850/900/1800/1900Quad-Band 850/900/1800/1900
Primary 2G networkGSM 850/900/1800/1900GSM 850/900/1800/1900
Primary 3G networkA version:
UMTS 800/850/900/1800/1900/2100

B version (USA):
UMTS 800/850/900/1800/1900/2100

C version:
UMTS 850/900/2100
UMTS 850/900/1700/1900/2100
Primary 4G networkLTE Cat15/Cat18

A version:
LTE Cat15 (Bands 1,2,3,5,7,8,18,19,20,26,28,32)
TD-LTE (Bands 34,38,39,40,41)

B version (USA):
LTE Cat18 (Bands 1,2,3,5,7,8,18,19,28)
TD-LTE (Bands 38,39,41)

C version:
LTE Cat18 (Bands 1,3,5,7,8,20)
TD-LTE (Band 40)
LTE Cat7/13 (1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 28, 66)
TD-LTE (38, 40, 41)
Primary 5G networkNot supportedNot supported
Primary data networkGPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-AGPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A
Secondary 2G networkGSM 850/900/1800/1900Not supported
Secondary 3G networkNot supportedNot supported
Secondary 4G networkNot supportedNot supported
Secondary data networkGPRS, EDGENot supported
CallingAsus Zenfone 5Z (ZS620KL 128GB)Samsung Galaxy A21s (SM-A217M)
MessagingSMS (T9), MMS, E-mail, Push mailSMS (T9), MMS, E-mail, Push mail
SpeakerphoneSupportedSupported
Video callingSupportedSupported
Call controlVoice dialing, Voice recorderVoice dialing, Voice recorder, Voice commands
CameraAsus Zenfone 5Z (ZS620KL 128GB)Samsung Galaxy A21s (SM-A217M)
Back camera (main camera)(dual camera)
12 megapixels
8MP ultrawidef/2.012mm1/4"1.12µmFF
(quad camera)
48 megapixels
8MP ultrawidef/2.21/4"1.12µm123º
2MP macrof/2.4
2MP depthf/2.4
Main camera resolution4000x3000 pixels8000x6000 pixels
Video recording (primary)4K UHD (3840x2160) 30 fpsFull HD (1920x1080) 30 fps
FlashDual-LED flashLED flash
Focal aperturef/1.8 (aperture)f/2.0 (aperture)
Focal length24mm lens26mm lens
Sensor size1/2.55" inches1/2" inches
Pixel size1.4µm pixel0.8µm pixel
AutofocusPDAF: phase detection autofocusPDAF: phase detection autofocus
Touch focusSupportedSupported
Image stabilizationOIS (4-axis): Optical stabilizationEIS: Digital stabilization
ZoomOnly digital zoomOnly digital zoom
Face/smile detectionFace detection, Smile detectionFace detection, Smile detection
BSI sensorNot supportedNot supported
HDRHDR photo on both camerasHDR photo on both cameras
2ª cameraAsus Zenfone 5Z (ZS620KL 128GB)Samsung Galaxy A21s (SM-A217M)
Front camera (secondary)8 megapixels13 megapixels
Front camera resolution3264x2448 pixels4128x3096 pixels
Video recording (secondary)Full HD (1920x1080)Full HD (1920x1080)
Front flashNot supportedNot supported
Focal aperturef/2.0 (aperture)f/2.2 (aperture)
Focal length24mm lensfeature not registered
Sensor size1/4" inches1/3.1" inches
Pixel size1.12µm pixel1.12µm pixel
MultimediaAsus Zenfone 5Z (ZS620KL 128GB)Samsung Galaxy A21s (SM-A217M)
RadioFMFM
TVNot supportedNot supported
Video formatsMP4, H.265, H.264, H.263MP4, H.265, H.264, H.263, XviD, MKV
Audio formatsMP3, OGG, eAAC+, FLACMP3, WAV, WMA, eAAC+, FLAC
ConnectivityAsus Zenfone 5Z (ZS620KL 128GB)Samsung Galaxy A21s (SM-A217M)
USBUSB 2.0 Type-C, USB OTG On-The-GoUSB 2.0 Type-C reversible connector
TV outputNot supportedNot supported
Audio output3.5mm jack3.5mm jack
Bluetooth5.0 + A2DP/LE5.0 + A2DP/LE
WiFi802.11 a/b/g/n/ac (2.4Ghz, 5Ghz)802.11 a/b/g/n/ac (2.4Ghz, 5Ghz) + MIMO
DLNANot supportedNot supported
NFCSupportedNot supported
GPSA-GPS, GeoTagging, GLONASS, BeiDouA-GPS, GeoTagging, GLONASS, GALILEO, BeiDou
Infrared portNot supportedNot supported
Other functionsAsus Zenfone 5Z (ZS620KL 128GB)Samsung Galaxy A21s (SM-A217M)
Active noise cancellationSupportedSupported
Vibrating alertSupportedSupported
RingtonesPolyphonic and customizedPolyphonic and customized
Web browserHTML, XHTML, HTML5HTML, XHTML, HTML5
SensorsAccelerometer
Proximity sensor
Compass
Ambient Light sensor
Gyroscope
Face unlock
Fingerprint sensor (rear-mounted)
Accelerometer
Proximity sensor
Compass
Gyroscope
Face unlock
Fingerprint sensor (rear-mounted)
Other features- Colors: Midnight Blue, Meteor Silver
- 2.5D curved glass screen
- 95% DCI-P3 coverage
- Supports glove touch
- ASUS ZenUI 5.0
- 24-bit/192kHz audio
- DTS sound (only headphones)
- WiFi direct, hotspot
- Colors: Black, White, Blue, Red
- One UI 2.0
- WiFi direct, hotspot
Power supplyAsus Zenfone 5Z (ZS620KL 128GB)Samsung Galaxy A21s (SM-A217M)
BatteryLi-Ion: Lithium-Ion (Non removable)LiPo: Li-Ion polymer (Non removable)
Battery capacity3300 mAh5000 mAh
Charger, watts18W (9V/2A) Fast battery charging15W (9V/1.67A) Fast battery charging
Talk time autonomy1500 minutes | 25 hours | 1 daysfeature not registered
Standbyfeature not registeredfeature not registered
Radiation rateAsus Zenfone 5Z (ZS620KL 128GB)Samsung Galaxy A21s (SM-A217M)
SAR 1.6W/kg (USA, Mexico, etc.)1.16W/kg (head) | 0.89W/kg (body)0.54W/kg (head) | 1.14W/kg (body)
SAR 2W/kg (Europe, UK, etc.)1.16W/kg (head) | 1.59W/kg (body)feature not registered
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