Comparison between:
- Samsung Galaxy Tab S4 Wi-Fi
- Alldocube U30GT2

Brand and model

Information about the brand, model and model alias (if any) of a specific device.

Samsung Galaxy Tab S4 Wi-FiAlldocube U30GT2
Samsung Galaxy Tab S4 Wi-Fi
Prices
Alldocube U30GT2
Model aliasSM-T830
T830
-

Design

Information about the dimensions and weight of the device, shown in different measurement units. Body materials, available colors, certifications.

Width249.3 mm
24.93 cm
0.82 ft
9.81 in
260.5 mm
26.05 cm
0.85 ft
10.26 in
Height164.3 mm
16.43 cm
0.54 ft
6.47 in
170.5 mm
17.05 cm
0.56 ft
6.71 in
Thickness7.1 mm
0.71 cm
0.02 ft
0.28 in
9.6 mm
0.96 cm
0.03 ft
0.38 in
Weight482 g
1.06 lbs
17 oz
670 g
1.48 lbs
23.63 oz
Volume290.82 cm³
17.66 in³
426.39 cm³
25.89 in³
ColorsBlack
Gray
White
Body materialsMetal
Glass
-

Operating system

Operating system is the system software, which manages and controls the functioning of the hardware components of the device.

Operating system (OS)Android 8.1 Oreo
Android 9.0 Pie
Android 4.1.1 Jelly Bean
Android 4.2.2 Jelly Bean
User interface (UI)Experience
One
-

System on Chip (SoC)

A system on a chip (SoC) includes into a single chip some of the main hardware components of the mobile device.

SoCQualcomm Snapdragon 835 MSM8998Rockchip RK3188
Process technology10 nm28 nm
CPU4x 2.35 GHz Kryo 280, 4x 1.9 GHz Kryo 280ARM Cortex-A9
CPU bits64 bit32 bit
Instruction setARMv8-AARMv7-A
Level 1 cache memory (L1)32 KB + 32 KB32 KB + 32 KB
Level 2 cache memory (L2)3072 KB
3 MB
512 KB
0.5 MB
CPU cores84
CPU frequency2350 MHz1800 MHz
GPUQualcomm Adreno 540ARM Mali-400 MP4
GPU cores-4
GPU frequency710 MHz533 MHz
RAM capacity4 GB2 GB
RAM typeLPDDR4XDDR3
RAM channelsDouble channel-
RAM frequency1866 MHz-

Storage

Every mobile device has a built-in storage (internal memory) with a fixed capacity.

Storage64 GB
256 GB
32 GB
UFS 2.1-

Memory cards

Memory cards are used in mobile devices for expanding their external storage capacity.

TypesmicroSD
microSDHC
microSDXC
microSD
microSDHC
microSDXC

Display

The display of a mobile device is characterized by its technology, resolution, pixel density, diagonal length, color depth, etc.

Type/technologySuper AMOLEDIPS
Diagonal size10.5 in
266.7 mm
26.67 cm
10.1 in
256.54 mm
25.65 cm
Width8.9 in
226.16 mm
22.62 cm
8.56 in
217.55 mm
21.75 cm
Height5.56 in
141.35 mm
14.14 cm
5.35 in
135.97 mm
13.6 cm
Aspect ratio1.6:1
16:10
1.6:1
16:10
Resolution2560 x 1600 pixels1920 x 1200 pixels
Pixel density288 ppi
113 ppcm
224 ppi
88 ppcm
Color depth24 bit
16777216 colors
24 bit
16777216 colors
Display area78.3 %66.81 %
Other featuresCapacitive
Multi-touch
Capacitive
Multi-touch
500 cd/m²-

Sensors

Different sensors measure different physical quantities and convert them into signals recognizable by the mobile device.

SensorsProximity
Light
Accelerometer
Compass
Gyroscope
Hall
Accelerometer
Gyroscope
Gravity

Primary camera

The primary camera of the mobile device is usually placed at its back and is used for taking photos and recording videos.

Sensor typeCMOS-
Aperturef/1.9f/2.8
Flash typeLEDLED
Image resolution4160 x 3120 pixels
12.98 MP
2592 x 1944 pixels
5.04 MP
Video resolution3840 x 2160 pixels
8.29 MP
640 x 480 pixels
0.31 MP
Video FPS30 fps14 fps
FeaturesAutofocus
Continuous shooting
Digital zoom
Geotagging
Panorama
HDR
Touch focus
Face detection
White balance settings
ISO settings
Exposure compensation
Self-timer
Scene mode
Autofocus
Sensor size - 1/3.06"
Pixel size - 1.12 μm
Focal length (35 mm equivalent) - 27 mm
Angle of view - 76°
-

Secondary camera

Secondary cameras are placed above the screen of the device and are usually used for video calls, gesture recognition, etc.

Sensor typeCMOS-
Aperturef/1.9-
Image resolution3264 x 2448 pixels
7.99 MP
1600 x 1200 pixels
1.92 MP
Video resolution1920 x 1080 pixels
2.07 MP
640 x 480 pixels
0.31 MP
Video FPS30 fps14 fps
Sensor size - 1/3.6"
Pixel size - 1.22 μm
Angle of view - 85°
-

Audio

Information about the type of speakers and the audio technologies supported by the device.

SpeakerLoudspeaker
Stereo speakers
Earpiece
Stereo speakers
4 x 1.2 W (Watt) speakers
Dolby Atmos
-

Radio

The radio in a mobile device is a built-in FM radio receiver.

RadioNo-

Tracking/Positioning

Information about the positioning and navigation technologies supported by the device.

Tracking/PositioningGPS
A-GPS
GLONASS
BeiDou
-

Wi-Fi

Wi-Fi is a technology that provides wireless data connections between various devices within a short range.

Wi-Fi802.11a
802.11b
802.11g
802.11n
802.11n 5GHz
802.11ac
Dual band
Wi-Fi Hotspot
Wi-Fi Direct
802.11b
802.11g
802.11n
2x2 MU-MiMO-

Bluetooth

Bluetooth is a standard for secure wireless data transfer between different types of devices over short distances.

Version5.02.1
FeaturesA2DP
AVRCP
DIP
HFP
HID
HSP
LE
MAP
OPP
PAN
PBAP
A2DP

USB

The Universal Serial Bus (USB) is an industry standard that allows different electronic devices to exchange data.

Connector typeUSB Type-CMicro USB
Version3.12.0
FeaturesCharging
Mass storage
On-The-Go
Charging
Mass storage

HDMI

The High-Definition Multimedia Interface (HDMI) is considered to be the digital alternative of the analog audio/video interface standards.

HDMI-Mini HDMI (Type C)

Headphone jack

The headphone jack is an audio phone connector, a.k.a. an audio jack. The most widely used one in mobile devices is the 3.5 mm headphone jack.

Headphone jackYesYes

Connectivity

Information about other important connectivity technologies supported by the devices.

ConnectivityComputer sync
OTA sync
Tethering
ANT+
Computer sync
OTA sync

Browser

A web browser is a software application for accessing, fetching, displaying and navigating through information on the World Wide Web.

BrowserHTML
HTML5
CSS 3
-

Audio file formats/codecs

Mobile devices support various audio file formats and codecs, which respectively store and code/decode digital audio data.

Audio file formats/codecsAAC
AAC+
AMR
AMR-WB
aptX
eAAC+
FLAC
M4A
MIDI
MP3
OGG
WMA
WAV
XMF
AAC
FLAC
MP3
OGG
WMA
WAV

Video file formats/codecs

Mobile devices support various video file formats and codecs, which respectively store and code/decode digital video data.

Video file formats/codecs3GPP
3GPP2
AVI
DivX
Flash Video
H.263
H.264
MKV
MP4
WebM
WMV
Xvid
ASF
AVI
Flash Video
MKV
MP4

Battery

The batteries of mobile devices differ in capacity and technology. They provide the electrical charge needed for the functioning of the devices.

Capacity7300 mAh7200 mAh
TypeLi-PolymerLi-Polymer
Charger output power5 V / 2 A
9 V / 1.67 A
-
FeaturesFast charging
Non-removable
Non-removable
-Battery life - up to 8 h

Specific Absorption Rate (SAR)

The SAR rating shows the amount of electromagnetic radiation absorbed by the human body when using a mobile device, expressed in W/kg.

Body SAR (EU)0.34 W/kg-

Additional features

Some devices have additional features, different from the standard ones above, but equally important and worth mentioning.

Additional featuresS Pen stylus (4096 pressure levels)
Samsung DeX
-
 Samsung Galaxy Tab S4 Wi-FiAlldocube U30GT2