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Samsung Galaxy A21 (SM-A215U) vs Asus Zenfone 3 Zoom (ZE553KL 128GB)

Side by side comparison between Samsung Galaxy A21 vs Asus Zenfone 3 Zoom phones, differences, pros, cons and full specifications. What's the better?

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Compare Asus Zenfone 3 Zoom X Samsung Galaxy A21 (SM-A215U) 09Points
6.5"
PLS

720x1600

16
MP

13mp

3GB
RAM

Octa-core

4000
mAh

(Non removable)

vs
17Points Asus Zenfone 3 Zoom (ZE553KL 128GB) Compare Samsung Galaxy A21 X
5.5"
AMOLED

1080x1920

12
MP

13mp

4GB
RAM

Octa-core

5000
mAh

(Non removable)

What's the better phone? Asus Zenfone 3 Zoom (ZE553KL 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!

Galaxy A21 (SM-A215U)} 9 Advantages Samsung Galaxy A21 (SM-A215U) vs Zenfone 3 Zoom (ZE553KL 128GB)} 17 Advantages Asus Zenfone 3 Zoom (ZE553KL 128GB)
+2.3GHz 64bit Octa-core (12nm)7%
More powerful processor, you can open your applications faster
vs2GHz 64bit Octa-core
+Until 512GB microSD, microSDXC100%
More external storage for files using memory cards
vsUntil 256GB microSD, microSDXC
+6.5"18%
Larger screen
vs5.5"
+(quad camera) 16MP + 8MP + 2MP + 2MP16%
Higher resolution main camera
vs(dual camera) 12MP + 12MP
+Android 10Advantage
Android 10 is newer and safer
vsAndroid 8.0 Oreo
+Face unlockAdvantage
Sensors help you use the device
vsNot supported
+15W50%
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.
vs10W
+802.11 a/b/g/n/ac [wifi5]Advantage
WiFi 802.11 a/b/g/n/ac [wifi5] is newer and faster
vs802.11 b/g/n [wifi4]
+5.0 + A2DP/LEAdvantage
Bluetooth 5.0 + A2DP/LE is newer and faster
vs4.2 + A2DP
3GB LPDDR3vs+4GB LPDDR333%
More RAM memory. Typically more responsive and better for multitasking.
32GB (20GB available)vs+128GB (118GB available)5 times
More internal storage for applications and files
193 grams (6.76 ounces)vs+170 grams (5.95 ounces)14%
Lighter
8.1 millimeters (0.32 inches)vs+8 millimeters (0.31 inches)1%
Thinner
Plastic body, glass frontvs+Aluminum body, glass frontAdvantage
More resistant material
TFT PLSvs+AMOLEDAdvantage
AMOLED display is brighter and more vivid
720x1600 pixelsvs+1080x1920 pixels80%
Higher resolution screen
270 PPIvs+401 PPI49%
Crisper display of text, images and videos because it has more pixels per inch (ppi)
LED flashvs+Dual-LED flashAdvantage
The Dual-LED flash helps in dark places or in low light
Only digital zoomvs+Digital and optical zoomAdvantage
The zoom allows for better focus and approach to take pictures
EIS: Digital stabilizationvs+OIS (4-axis): Optical stabilizationAdvantage
Image stabilization prevents blurry photos and helps in recording motion video
1/3.06" inchesvs+1/2.5" inches22%
The larger sensor camera lets you take photos with better depth.
f/1.8 (aperture)vs+f/1.7 (aperture)6%
Diaphragm opening (Aperture) of the camera which has the smallest F number takes photos with better light exposure.
Full HD (1920x1080)vs+4K UHD (3840x2160)3 times
More image quality for recording videos with the primary camera
4000 mAhvs+5000 mAh25%
Battery - higher amperage (mAh) allows more device usage time, but it also depends on the hardware and use
1 slot (Single-SIM)
(dedicated slot)
vs+2 slots (Dual-SIM)
(hybrid slot/shares the same microSD slot)Advantage
You can have more mobile carriers/operators on the same device.
Not supportedvs+Gorilla Glass 5Advantage
Protection against scratches on the screen lets you carry your phone with your keys

25 Common items in both devices
16 million
PDAF: phase detection autofocus / LDAF/PDAF: laser/phase detection autofocus
HDR photo on both cameras
(front) 13MP
(front) Full HD (1920x1080)
4G LTE
150 Mbps
+18 specs and more in the table below

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

Highlight differences Clear highlight

📱 Model features

Galaxy A21 (SM-A215U)Asus Zenfone 3 Zoom (ZE553KL 128GB)
ModelGalaxy A21 (SM-A215U)Zenfone 3 Zoom (ZE553KL 128GB)
Other model namesGalaxy A21 SM-A215U (Sprint, T-Mobile, US Cellular, Verizon)Asus Zenfone 3 Zoom ZE553KL (128GB + 4GB RAM), Zenfone Zoom
Country or region availableUSA
USA
BrazilChinaUSAPhilippinesHong KongIndiaJapanSingaporeTaiwan(Global, International)
Brazil, China, USA, Philippines, Hong Kong, India, Japan, Singapore, Taiwan, (Global, International)
BrandSamsungAsus
Release date6/26/20201/1/2017
Depth8.1 millimeters (0.32 inches)8 millimeters (0.31 inches)
Size (width x height)76.7 x 167.8 millimeters (3.02 x 6.61 in)77 x 154.3 millimeters (3.03 x 6.07 in)
Weight193 grams (6.76 ounces)170 grams (5.95 ounces)
Build, materialsPlastic body, glass frontAluminum body, glass front
Protection against water and othersNot supportedNot supported

📲 Display

Galaxy A21 (SM-A215U)Asus Zenfone 3 Zoom (ZE553KL 128GB)
Display typeTFT PLSAMOLED
Screen size6.5" inches5.5" inches
Screen-to-body ratio~79.3% (screen-to-body ratio)~70.2% (screen-to-body ratio)
Display resolution720x1600 pixels (20:9)1080x1920 pixels
TouchscreenCapacitive MultitouchCapacitive Multitouch 10-points
Pixel density (dot pitch)270 PPI401 PPI
Colors16 million16 million
Scratch-resistant glassNot supportedGorilla Glass 5
Refresh rate60Hzfeature not registered
Display featuresNot supportedfeature not registered

🤖 Operating System

Galaxy A21 (SM-A215U)Asus Zenfone 3 Zoom (ZE553KL 128GB)
System versionAndroid 10Android 6.0.1 Marshmallow
Firmware updatefeature not registeredAndroid 8.0 Oreo
User Interfacefeature not registeredfeature not registered

⚙️ Processor

Galaxy A21 (SM-A215U)Asus Zenfone 3 Zoom (ZE553KL 128GB)
Chipset64bit: MediaTek Helio P35 (MT6765) (12nm)64bit: Qualcomm Snapdragon 625 MSM8953 (14nm)
CPUOcta-core, 2 processors:
4x 2.3GHz ARM Cortex-A53 (Quad-core)
4x 1.8GHz ARM Cortex-A53 (Quad-core)
Octa-core, 1 processor:
8x 2GHz ARM Cortex-A53 (Octa-core)
GPU graphical controllerPowerVR GE8320 MP2 (680MHz)Qualcomm Adreno 506 650Mhz
Performance (benchmark)feature not registeredfeature not registered

💽 Memory and storage

Galaxy A21 (SM-A215U)Asus Zenfone 3 Zoom (ZE553KL 128GB)
RAM memory3GB LPDDR34GB LPDDR3
Internal storage32GB (20GB available)
eMMC 5.1
128GB (118GB available)
External storageUntil 512GB microSD, microSDXC
(dedicated slot)
Until 256GB microSD, microSDXC
(hybrid slot/shares the same SIM-2 slot)

📶 Mobile networks

Galaxy A21 (SM-A215U)Asus Zenfone 3 Zoom (ZE553KL 128GB)
Dual-SIMNot supportedDual-SIM Standby - Call active on one sim card
(hybrid slot/shares the same microSD slot)
SIM card1 slot (Single-SIM)
nano-SIM (4FF)
2 slots (Dual-SIM)
nano-SIM (4FF)
Maximum Download / Upload150/50 Mbps150/50 Mbps
Network technology2G, 3G, 4G2G, 3G, 4G
Frequency, bands Expand band details Collapse details
GSM MHz bandQuad-Band 850/900/1800/1900Quad-Band 850/900/1800/1900
Primary 2G networkCDMA 800/1900, GSM 850/900/1800/1900GSM 850/900/1800/1900
Primary 3G networkCDMA2000 1xEV-DO
UMTS 850/900/1700/1900/2100
Global:
UMTS 850/900/1900/2100
India/Indonesia:
TD-SCDMA 1900/2000
UMTS 850/900/2100
USA/Brazil:
UMTS 850/900/1700/1900/2100
China:
UMTS 850/900/1900/2100
Taiwan/HongKong/Japan/SG/PH:
TD-SCDMA 190
Primary 4G networkLTE Cat4 (1, 2, 3, 5, 7, 8, 20, 28)
TD-LTE (38, 40, 41)
VoLTE
LTE Cat4
Global version:
LTE (Bands 1,2,3,5,7,8,20)
India/Indonesia version:
LTE (Bands 1,3,5,8)
USA/Brazil version:
LTE (Bands 1,2,3,4,5,7,8,17,28)
China version:
LTE (Bands 1,2,3,5,7,8)
TD-LTE (Bands 38,39,40,41)
Taiwan/Japan/HongKong/Singapore/Philippines version:
LTE (Bands 1,2,3,5,7,8,18,19,26,28)
TD-LTE (Bands 38,39,40,41)
Primary 5G networkNot supportedNot supported
Primary data networkGPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTEGPRS, EDGE, TD-SCDMA, UMTS, TD-HSDPA, HSDPA, HSUPA, HSPA+, TD-LTE, LTE
Secondary 2G networkNot supportedGSM 850/900/1800/1900
Secondary 3G networkNot supportedNot supported
Secondary 4G networkNot supportedNot supported
Secondary data networkNot supportedGPRS, EDGE

📷 Camera

Galaxy A21 (SM-A215U)Asus Zenfone 3 Zoom (ZE553KL 128GB)
Back camera (main camera)(quad camera)
16 megapixels
8MP ultrawide f/2.21/4.0"1.12µm
2MP macro f/2.4
2MP depth f/2.4
(dual camera)
12 megapixels
12MP f/2.859mm
Main camera resolution4608x3456 pixels4000x3000 pixels
Video recording (primary)Full HD (1920x1080) 30 fps4K UHD (3840x2160) 24 fps
FlashLED flashDual-LED flash
Focal aperturef/1.8 (aperture)f/1.7 (aperture)
Focal lengthfeature not registered25mm (lens)
Sensor size1/3.06" inches1/2.5" inches
Pixel size1µm pixel1.4µm pixel
AutofocusPDAF: phase detection autofocusLDAF/PDAF: laser/phase detection autofocus
Touch focusSupportedSupported
Image stabilizationEIS: Digital stabilizationOIS (4-axis): Optical stabilization
ZoomOnly digital zoomDigital and optical zoom
Face/smile detectionFace detection, Smile detectionFace detection, Smile detection
BSI sensorNot supportedNot supported
HDRHDR photo on both camerasHDR photo on both cameras
Camera extrasfeature not registeredfeature not registered

📸 Front camera

Galaxy A21 (SM-A215U)Asus Zenfone 3 Zoom (ZE553KL 128GB)
Front camera (secondary)13 megapixels13 megapixels
Front camera resolution4128x3096 pixels4128x3096 pixels
Video recording (secondary)Full HD (1920x1080)Full HD (1920x1080)
Front flashNot supportedNot supported
Focal aperturef/2.0 (aperture)f/2.0 (aperture)
Focal lengthfeature not registeredfeature not registered
Sensor sizefeature not registered1/3" inches
Pixel size1.12µm pixel1.12µm pixel

🔉 Sound and multimedia

Galaxy A21 (SM-A215U)Asus Zenfone 3 Zoom (ZE553KL 128GB)
LoudspeakerSupportedSupported
Active noise cancellation2 microphones or more2 microphones or more
RadioFMFM
TVNot supportedNot supported
Video formatsMP4, H.265, H.264, H.263, XviD, MKVMP4, H.264, H.263
Audio formatsMP3, WAV, WMA, eAAC+, FLACMP3, OGG, eAAC+, FLAC

🔌 Connectivity

Galaxy A21 (SM-A215U)Asus Zenfone 3 Zoom (ZE553KL 128GB)
USBUSB 2.0 Type-C reversible connectorUSB 2.0 Type-C, USB OTG On-The-Go
Audio output3.5mm jack3.5mm jack
TV outputNot supportedNot supported
Bluetooth5.0 + A2DP/LE4.2 + A2DP
WiFi802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) + MIMO
WiFi Direct, hotspot
802.11 b/g/n [wifi4] (2.4GHz)
WiFi Direct, hotspot
DLNANot supportedNot supported
GPSA-GPS, GeoTagging, GLONASSA-GPS, GeoTagging, GLONASS, BeiDou
NFCNot supportedNot supported
Infrared portNot supportedSupported

🧭 Sensors

Galaxy A21 (SM-A215U)Asus Zenfone 3 Zoom (ZE553KL 128GB)
SensorsAccelerometer
Ambient light sensor
Compass
Face unlock
Fingerprint sensor (rear-mounted)
Gyroscope
Proximity sensor
Accelerometer
Ambient light sensor
Compass
Fingerprint sensor
Gyroscope
Proximity sensor
Vibrating alertSupportedSupported

🔋 Battery

Galaxy A21 (SM-A215U)Asus Zenfone 3 Zoom (ZE553KL 128GB)
Battery typeLiPo: li-ion polymer (Non removable)Li-Ion: lithium-ion (Non removable)
Battery capacity4000 mAh5000 mAh
Charger, watts15W Wired fast charging10W Wired charging
Inductive / wireless chargingNot supportedfeature not registered
Talk time autonomyfeature not registered48 hours (2 days)
Standbyfeature not registered1008 hours (42 days)

➕ Other features

Galaxy A21 (SM-A215U)Asus Zenfone 3 Zoom (ZE553KL 128GB)
Call controlVoice dialing, Voice recorder, Voice commandsVoice dialing, Voice recorder
MessagingSMS (T9), MMS, E-mail, Push mailSMS (T9), MMS, E-mail, Push mail
Hands-free callingSupportedSupported
Video callingSupportedSupported
RingtonesPolyphonic and customizedPolyphonic and customized
Web browserHTML, XHTML, HTML5HTML, XHTML, HTML5
AntennaInternal antennaInternal antenna
Qwerty physical keyboardNot supportedNot supported
Miscellaneous• Colors: Black
• One UI 2.0
• Colors: Black, Silver, Rose Gold
• ASUS ZenUI 3.0
• 2.5D glass screen
• 500nits brightness screen
• Sony IMX362 back camera sensor
• Sony IMX214 front camera sensor
• DTS sound enhancement
• 24-bit/192kHz audio
• 100GB Google Drive

☢️ Radiation rate

Galaxy A21 (SM-A215U)Asus Zenfone 3 Zoom (ZE553KL 128GB)
SAR 1.6W/kg (USA, Mexico, etc.)0.6W/kg (head), 1.27W/kg (body)feature not registered
SAR 2W/kg (Europe, UK, etc.)feature not registeredfeature not registered
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