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Samsung Galaxy J4 (SM-J400G) vs Samsung Galaxy S21 Ultra (SM-G998B 256GB)

Side by side comparison between Samsung Galaxy J4 vs Samsung Galaxy S21 Ultra phones, differences, pros, cons and full specifications. What's the better?

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Compare Samsung Galaxy S21 Ultra X Samsung Galaxy J4 (SM-J400G) 06Points
5.5"
AMOLED

720x1280

13
MP

5mp

2GB
RAM

Quad-core

3000
mAh

(Removable)

vs
38Points Samsung Galaxy S21 Ultra (SM-G998B 256GB) Compare Samsung Galaxy J4 X
6.8"
AMOLED

1440x3200

108
MP

40mp

12GB
RAM

Octa-core

5000
mAh

(Non removable)

What's the better phone? Samsung Galaxy S21 Ultra (SM-G998B 256GB)

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 J4 (SM-J400G)} 6 Advantages Samsung Galaxy J4 (SM-J400G) vs Galaxy S21 Ultra (SM-G998B 256GB)} 38 Advantages Samsung Galaxy S21 Ultra (SM-G998B 256GB)
+Until 256GB microSD, microSDXCAdvantage
More external storage for files using memory cards
vsNot supported
+175 grams (6.13 ounces)30%
Lighter
vs227 grams (7.95 ounces)
+8.1 millimeters (0.32 inches)10%
Thinner
vs8.9 millimeters (0.35 inches)
+LED flash on both camerasAdvantage
The LED flash on both cameras helps in dark places or in low light
vsLED flash
+Li-Ion: lithium-ion (Removable)Advantage
Removable battery can be replaced easily
vsLiPo: li-ion polymer (Non removable)
+3.5mm jackAdvantage
Headsets with 3.5mm Jack size are more common and easy to find in stores
vsType-C reversible connector
1.4GHz 64bit Quad-core (14nm)vs+2.9GHz 64bit Octa-core (5nm)155%
More powerful processor, you can open your applications faster
2GB LPDDR3vs+12GB LPDDR55 times
More RAM memory. Typically more responsive and better for multitasking.
32GB (22GB available)vs+256GB (220GB available)9 times
More internal storage for applications and files
Flash (EEPROM)vs+UFS 3.1Advantage
Fastest write and read storage.
Plastic bodyvs+Aluminum frame, glass front/backAdvantage
More resistant material
720x1280 pixelsvs+1440x3200 pixels4 times
Higher resolution screen
267 PPIvs+516 PPI93%
Crisper display of text, images and videos because it has more pixels per inch (ppi)
5.5"vs+6.8"24%
Larger screen
(back) 13MPvs+(quad camera) 108MP + 10MP + 10MP + 12MP10 times
Higher resolution main camera
Only digital zoomvs+Digital and optical zoomAdvantage
The zoom allows for better focus and approach to take pictures
EIS: Digital stabilizationvs+OIS: Optical stabilizationAdvantage
Image stabilization prevents blurry photos and helps in recording motion video
Not supportedvs+BSI sensorAdvantage
The BSI sensor allows the entry of more light generating photos with more detail and brightness
HDR photo only main cameravs+HDR photo/video on both camerasAdvantage
The HDR technology produced photos with more detail in dark areas
f/1.9 (aperture)vs+f/1.8 (aperture)6%
Diaphragm opening (Aperture) of the camera which has the smallest F number takes photos with better light exposure.
(front) 5MPvs+(front) 40MP7 times
Higher resolution secondary camera to take pictures and selfies
Full HD (1920x1080)vs+8K UHD (7680x4320)15 times
More image quality for recording videos with the primary camera
(front) HD (1280x720)vs+(front) 4K UHD (3840x2160)8 times
More image quality for recording videos with the secondary camera
Android 9.0 Pievs+Android 15Advantage
Android 15 is newer and safer
4G LTEvs+5G SA/NSAAdvantage
The 5G SA/NSA network is newer and faster
(4G LTE) 150 Mbpsvs+(5G SA/NSA) 5000 Mbps32 times
Faster for surfing the internet and download files
Not supportedvs+Ambient light sensorAdvantage
Sensors help you use the device
Not supportedvs+BarometerAdvantage
Sensors help you use the device
Not supportedvs+CompassAdvantage
Sensors help you use the device
Not supportedvs+Face unlockAdvantage
Sensors help you use the device
Not supportedvs+Fingerprint sensor (under display)Advantage
Sensors help you use the device
Not supportedvs+GyroscopeAdvantage
Sensors help you use the device
Not supportedvs+UWB (Ultra Wideband)Advantage
Sensors help you use the device
3000 mAhvs+5000 mAh67%
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+1 slot (Single-SIM) + e-SIM (Eletronic)Advantage
You can have more mobile carriers/operators on the same device.
Not supportedvs+Active noise cancellationAdvantage
More noise-canceling microphones allow for better quality in calls and audio for recorded videos
802.11 b/g/n [wifi4]vs+802.11 a/b/g/n/ac/ax [wifi6]Advantage
WiFi 802.11 a/b/g/n/ac/ax [wifi6] is newer and faster
Not supportedvs+DLNAAdvantage
With DLNA technology you can access and play media files on TV, tablet or DLNA compatible device.
4.2 + A2DPvs+5.2 + A2DP/LEAdvantage
Bluetooth 5.2 + A2DP/LE is newer and faster
Not supportedvs+NFCAdvantage
NFC allows you to make payments by approach quickly and securely
MicroUSB 2.0, USB OTG On-The-Govs+USB 3.2 Type-C, USB OTG On-The-GoAdvantage
Newer and faster USB version for transferring photos, mp3 or data.
MicroUSB 2.0, USB OTG On-The-Govs+Type-CAdvantage
Reversible connector, you can stick in a USB-C cable any which way; either side is up.
Not supportedvs+Gorilla Glass VictusAdvantage
Protection against scratches on the screen lets you carry your phone with your keys
Not supportedvs+IP68 certifiedAdvantage
Protection against water allows you talk to your friends in the rain, for example

13 Common items in both devices
Super AMOLED / Dynamic AMOLED
16 million
Autofocus / PDAF: phase detection autofocus on both cameras
Capacitive
Multitouch
Accelerometer
Proximity sensor
+6 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 J4 (SM-J400G)Galaxy S21 Ultra (SM-G998B 256GB)
ModelGalaxy J4 (SM-J400G)Galaxy S21 Ultra (SM-G998B 256GB)
Other model namesGalaxy J4 J400G Single-sim, SM-J400GZPENZCGalaxy S21 Ultra 5G (SM-G998B Single-SIM)
Country or region availableAustraliaNew Zealand
Australia, New Zealand
Australia
Australia
BrandSamsungSamsung
Release date5/1/20181/29/2021, Announced: 1/14/2021
Depth8.1 millimeters (0.32 inches)8.9 millimeters (0.35 inches)
Size (width x height)77.2 x 151.7 millimeters (3.04 x 5.97 in)75.6 x 165.1 millimeters (2.98 x 6.5 in)
Weight175 grams (6.13 ounces)227 grams (7.95 ounces)
Build, materialsPlastic bodyAluminum frame, glass front/back
Protection against water and othersNot supportedIP68 certified: water-resistant up to 1.5 meters for 30min and dust-resistant

📲 Display

Galaxy J4 (SM-J400G)Galaxy S21 Ultra (SM-G998B 256GB)
Display typeSuper AMOLEDDynamic AMOLED
Screen size5.5" inches6.8" inches
Screen-to-body ratio~71.2% (screen-to-body ratio)~89.4% (screen-to-body ratio)
Display resolution720x1280 pixels1440x3200 pixels (20:9)
TouchscreenCapacitive MultitouchCapacitive Multitouch 10-points
Pixel density (dot pitch)267 PPI516 PPI
Colors16 million16 million
Scratch-resistant glassNot supportedGorilla Glass Victus
Refresh ratefeature not registered120Hz
Display featuresfeature not registered1500nits[peak]
HDR10+
Always-On Display

🤖 Operating System

Galaxy J4 (SM-J400G)Galaxy S21 Ultra (SM-G998B 256GB)
System versionAndroid 8.0 OreoAndroid 11
Firmware updateAndroid 9.0 PieAndroid 15
User Interfacefeature not registeredOne UI 3.1 / 4.1 / 5.1 / 6.0 / 7.0

⚙️ Processor

Galaxy J4 (SM-J400G)Galaxy S21 Ultra (SM-G998B 256GB)
Chipset64bit: Samsung Exynos 7570 (14nm)64bit: Samsung Exynos 2100 (5nm)
CPUQuad-core, 1 processor:
4x 1.4GHz ARM Cortex-A53 (Quad-core)
Octa-core, 3 processors:
1x 2.9GHz ARM Cortex-X1 (Single-core)
3x 2.8GHz ARM Cortex-A78 (Triple-core)
4x 2.2GHz ARM Cortex-A55 (Quad-core)
GPU graphical controllerARM Mali-T720 MP1 (830MHz)ARM Mali-G78 MP14 (854MHz)
Performance (benchmark)feature not registeredAnTuTu: 657150 (v8), 727634 (v9)
Geekbench: 3457 (v5.2)
GFXBench: 51fps (ES 3.1 onscreen)

💽 Memory and storage

Galaxy J4 (SM-J400G)Galaxy S21 Ultra (SM-G998B 256GB)
RAM memory2GB LPDDR312GB LPDDR5
Internal storage32GB (22GB available)
Flash (EEPROM)
256GB (220GB available)
UFS 3.1
External storageUntil 256GB microSD, microSDXC
(dedicated slot)
Not supported

📶 Mobile networks

Galaxy J4 (SM-J400G)Galaxy S21 Ultra (SM-G998B 256GB)
Dual-SIMNot supportedDual-SIM Standby - Call active on one sim card
SIM card1 slot (Single-SIM)
micro-SIM (3FF)
1 slot (Single-SIM)
nano-SIM (4FF) + e-SIM
Maximum Download / Upload150/50 Mbps5000/1920 Mbps
Network technology2G, 3G, 4G2G, 3G, 4G, 5G
Frequency, bands Expand band details Collapse details
GSM MHz bandTri-Band 850/900/1800Quad-Band 850/900/1800/1900
Primary 2G networkGSM 850/900/1800GSM 850/900/1800/1900
Primary 3G networkUMTS 850/900/2100UMTS 850/900/1700/1900/2100
Primary 4G networkLTE Cat4 (Bands 1,3,5,7,8,28)
TD-LTE (Bands 38,40)
LTE Cat20 (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 66)
TD-LTE (38, 39, 40, 41)
VoLTE
Primary 5G networkNot supportedSA/NSA/Sub6 (1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 77, 78)
Primary data networkGPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTEGPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA
Secondary 2G networkNot supportedGSM 850/900/1800/1900
Secondary 3G networkNot supportedUMTS 850/900/1700/1900/2100
Secondary 4G networkNot supportedLTE Cat20 (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 66)
TD-LTE (38, 39, 40, 41)
VoLTE
Secondary data networkNot supportedGPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA

📷 Camera

Galaxy J4 (SM-J400G)Galaxy S21 Ultra (SM-G998B 256GB)
Back camera (main camera)13 megapixels(quad camera)
108 megapixels
10MP periscope telephoto f/4.9240mm1/3.24"1.22µmPDAFOIS10x-optical-zoom
10MP telephoto f/2.470mm1/3.24"1.22µmPDAFOIS3x-optical-zoom
12MP ultrawide f/2.213mm1/2.55"1.4µmPDAFSuper-Steady-video
Main camera resolution4128x3096 pixels12000x9000 pixels
Video recording (primary)Full HD (1920x1080) 30 fps8K UHD (7680x4320) 24 fps
FlashLED flash on both camerasLED flash
Focal aperturef/1.9 (aperture)f/1.8 (aperture)
Focal length28mm (lens)26mm (lens)
Sensor sizefeature not registered1/1.33" inches
Pixel sizefeature not registered1.8µm pixel
AutofocusAutofocusPDAF: phase detection autofocus on both cameras
Touch focusSupportedSupported
Image stabilizationEIS: Digital stabilizationOIS: Optical stabilization
ZoomOnly digital zoomDigital and optical zoom
Face/smile detectionFace detection, Smile detectionFace detection, Smile detection
BSI sensorNot supportedSupported
HDRHDR photo only main cameraHDR photo/video on both cameras
Camera extrasfeature not registered4K@60fps
1080p@240fps
720p@960fps

📸 Front camera

Galaxy J4 (SM-J400G)Galaxy S21 Ultra (SM-G998B 256GB)
Front camera (secondary)5 megapixels40 megapixels
Front camera resolution2560x1920 pixels7296x5472 pixels
Video recording (secondary)HD (1280x720)4K UHD (3840x2160)
Front flashLEDNot supported
Focal aperturef/2.2 (aperture)f/2.2 (aperture)
Focal lengthfeature not registered26mm (lens)
Sensor sizefeature not registered1/2.8" inches
Pixel sizefeature not registered0.7µm pixel

🔉 Sound and multimedia

Galaxy J4 (SM-J400G)Galaxy S21 Ultra (SM-G998B 256GB)
LoudspeakerSupportedStereo sound
32-bit/384kHz
Dolby Atmos
Tuned by AKG
Active noise cancellationNot supported3 microphones
RadioFMFM
TVNot supportedNot supported
Video formatsMP4, H.264, H.263, MKV, WMVMP4, H.265, H.264, H.263, XviD, MKV
Audio formatsMP3, OGG, eAAC+, FLACMP3, WAV, WMA, eAAC+, FLAC

🔌 Connectivity

Galaxy J4 (SM-J400G)Galaxy S21 Ultra (SM-G998B 256GB)
USBMicroUSB 2.0, USB OTG On-The-GoUSB 3.2 Type-C, USB OTG On-The-Go
Audio output3.5mm jackType-C reversible connector
TV outputNot supportedUSB Type-C (reversible)
Bluetooth4.2 + A2DP5.2 + A2DP/LE
WiFi802.11 b/g/n [wifi4] (2.4GHz)
WiFi Direct, hotspot
802.11 a/b/g/n/ac/ax [wifi6] (2.4GHz, 5GHz) + MIMO
WiFi Direct, hotspot
DLNANot supportedSupported
GPSA-GPS, GeoTagging, GLONASS, BeiDouA-GPS, GeoTagging, GLONASS, GALILEO, BeiDou
NFCNot supportedSupported
Infrared portNot supportedNot supported

🧭 Sensors

Galaxy J4 (SM-J400G)Galaxy S21 Ultra (SM-G998B 256GB)
SensorsAccelerometer
Proximity sensor
Accelerometer
Ambient light sensor
Barometer
Compass
Face unlock
Fingerprint sensor (under display)
Gesture
Gyroscope
Hall effect
Proximity sensor
UWB (Ultra Wideband)
Vibrating alertSupportedSupported

🔋 Battery

Galaxy J4 (SM-J400G)Galaxy S21 Ultra (SM-G998B 256GB)
Battery typeLi-Ion: lithium-ion (Removable)LiPo: li-ion polymer (Non removable)
Battery capacity3000 mAh5000 mAh
Charger, wattsWired charging25W Wired fast charging
USB Power Delivery 3.0
Inductive / wireless chargingfeature not registered15W Qi wireless charging (Qi/PMA)
4.5W Reverse wireless charging
Talk time autonomy20 hoursfeature not registered
Standbyfeature not registeredfeature not registered

➕ Other features

Galaxy J4 (SM-J400G)Galaxy S21 Ultra (SM-G998B 256GB)
Call controlVoice dialing, Voice recorderVoice dialing, Voice recorder, Voice commands
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, Gold, Orchid Gray• Colors: Phantom Black, Silver, Titanium, Navy, Brown
• Samsung Pay (Visa, MasterCard)
• Samsung DeX
• Stylus pen support

☢️ Radiation rate

Galaxy J4 (SM-J400G)Galaxy S21 Ultra (SM-G998B 256GB)
SAR 1.6W/kg (USA, Mexico, etc.)feature not registered0.24W/kg (head), 0.72W/kg (body)
SAR 2W/kg (Europe, UK, etc.)0.356W/kg (head), 1.492W/kg (body)0.714W/kg (head), 1.58W/kg (body)
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