Comparison between:
- Oppo A85
- Sigma Mobile X-style Tab A83

Brand and model

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

Oppo A85Sigma Mobile X-style Tab A83
Oppo A85Sigma Mobile X-style Tab A83
Model alias-A83

Design

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

Width73.1 mm
7.31 cm
0.24 ft
2.878 in
207 mm
20.7 cm
0.679 ft
8.15 in
Height150.5 mm
15.05 cm
0.494 ft
5.925 in
123 mm
12.3 cm
0.404 ft
4.843 in
Thickness7.7 mm
0.77 cm
0.025 ft
0.303 in
9 mm
0.9 cm
0.03 ft
0.354 in
Weight143 g
0.32 lbs
5.04 oz
360 g
0.79 lbs
12.7 oz
Volume84.71 cm³
5.14 in³
229.15 cm³
13.92 in³
ColorsBlack
Gold
Black
Gray
Body materialsMetalPlastic
Metal

SIM card

The Subscriber Identity Module (SIM) is used in mobile devices for storing data authenticating the subscribers of mobile services.

SIM card typeNano-SIMMicro-SIM
Number of SIM cards21

Networks

A mobile (cellular) network is a radio system, which allows a large number of mobile devices to communicate with each other.

GSMGSM 850 MHz
GSM 900 MHz
GSM 1800 MHz
GSM 1900 MHz
GSM 850 MHz
GSM 900 MHz
GSM 1800 MHz
GSM 1900 MHz
TD-SCDMATD-SCDMA 1880-1920 MHz
TD-SCDMA 2010-2025 MHz
-
UMTSUMTS 850 MHz
UMTS 900 MHz
UMTS 1900 MHz
UMTS 2100 MHz
UMTS 900 MHz
UMTS 2100 MHz
LTELTE 850 MHz
LTE 900 MHz
LTE 1700/2100 MHz
LTE 1800 MHz
LTE 1900 MHz
LTE 2100 MHz
LTE 2600 MHz
LTE-TDD 1900 MHz (B39)
LTE-TDD 2300 MHz (B40)
LTE-TDD 2500 MHz (B41)
LTE-TDD 2600 MHz (B38)
-

Mobile network technologies and bandwidth

Communication between devices within mobile networks is realized via various generations of network technologies, which provide different bandwidth.

Mobile network technologiesUMTS
EDGE
GPRS
HSPA+
LTE Cat 7
UMTS
EDGE
GPRS
HSPA+

Operating system

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

Operating system (OS)ColorOS 3.2 (Android 7.1.1 Nougat)Android 8.1 Oreo

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.

SoCMediaTek Helio P23 (MT6763T)MediaTek MT8321
Process technology16 nm28 nm
CPU4x 2.3 GHz ARM Cortex-A53, 4x 1.65 GHz ARM Cortex-A53ARM Cortex-A7
CPU bits64 bit32 bit
Instruction setARMv8-AARMv7
Level 1 cache memory (L1)-32 KB + 32 KB
Level 2 cache memory (L2)-256 KB
0.25 MB
CPU cores84
CPU frequency2300 MHz1300 MHz
GPUARM Mali-G71 MP2ARM Mali-400 MP2
GPU cores22
GPU frequency770 MHz500 MHz
RAM capacity4 GB2 GB
RAM typeLPDDR4XLPDDR3
RAM channelsDouble channel-
RAM frequency1600 MHz-

Storage

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

Storage32 GB16 GB

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/technologyIPSIPS
Diagonal size5.7 in
144.78 mm
14.48 cm
8 in
203.2 mm
20.32 cm
Width2.55 in
64.75 mm
6.47 cm
6.78 in
172.31 mm
17.23 cm
Height5.1 in
129.5 mm
12.95 cm
4.24 in
107.7 mm
10.77 cm
Aspect ratio2:1
2:1 (18:9)
1.6:1
16:10
Resolution720 x 1440 pixels1280 x 800 pixels
Pixel density282 ppi
110 ppcm
189 ppi
74 ppcm
Color depth24 bit
16777216 colors
24 bit
16777216 colors
Display area76.46 %73.12 %
Other featuresCapacitive
Multi-touch
Capacitive
Multi-touch
2.5D curved glass screen
LTPS (Low Temperature PolySilicon)
-

Sensors

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

SensorsProximity
Light
Accelerometer
Compass
Proximity
Light
Accelerometer

Rear camera

The primary camera of the mobile device is usually placed on its back and can be combined with one or more additional cameras.

Sensor typeCMOSCMOS BSI
Flash typeDual LEDLED
Image resolution4160 x 3120 pixels
12.98 MP
2592 x 1944 pixels
5.04 MP
Video resolution1920 x 1080 pixels
2.07 MP
1280 x 720 pixels
0.92 MP
Video FPS30 fps30 fps
FeaturesAutofocus
Continuous shooting
Digital zoom
Geotagging
Panorama
HDR
Touch focus
Face detection
White balance settings
ISO settings
Exposure compensation
Self-timer
Scene mode
Phase detection autofocus (PDAF)
Continuous shooting
Digital zoom
Geotagging
Panorama
HDR
White balance settings
ISO settings
Exposure compensation
Self-timer
Scene mode

Front camera

Modern smartphones have one or more front cameras and their positioning has led to various design concepts – pop-up camera, rotating camera, notch, punch hole, under-display camera, etc.

Sensor typeCMOS-
Number of lenses5-
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 fps30 fps

Audio

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

SpeakerLoudspeakerLoudspeaker
Earpiece

Radio

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

Radio-Yes

Tracking/Positioning

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

Tracking/PositioningGPS
A-GPS
GLONASS
GPS
A-GPS

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
Dual band
Wi-Fi Hotspot
Wi-Fi Direct
802.11b
802.11g
802.11n
Wi-Fi Hotspot
Wi-Fi Direct

Bluetooth

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

Version4.24.0
FeaturesA2DP
EDR
LE
A2DP
EDR
LE

USB

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

Connector typeMicro USBMicro USB
Version2.02.0
FeaturesCharging
Mass storage
On-The-Go
Charging
Mass storage
On-The-Go

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
VoLTE
Computer sync
OTA sync
Tethering

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
HTML
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
AMR
eAAC+
FLAC
MIDI
MP3
OGG
WMA
WAV
AAC
AMR
eAAC+
FLAC
MIDI
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
AVI
H.263
H.264
H.265
MKV
MP4
WebM
WMV
Xvid
3GPP
AVI
MKV
QuickTime
MP4
WebM
Xvid

Battery

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

Capacity3090 mAh4000 mAh
TypeLi-PolymerLi-Polymer
Quick charge technologyVOOC-
FeaturesFast charging
Non-removable
Non-removable
 Oppo A85Sigma Mobile X-style Tab A83