LG U vs Samsung Galaxy A31

Compare recorded specifications, size and practical differences.

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Key differences

Calculated from recorded specifications using minimum difference thresholds. These are differences, not an overall ranking. For three phones, numeric highlights compare the two extremes.

  • Display technology

    OLED versus LCD

    U:
    LCD
    Galaxy A31:
    OLED
  • Weight

    U: 50 g lighter

    U:
    135 g
    Galaxy A31:
    185 g
  • Screen diagonal

    U: 1.2 in smaller diagonal

    U:
    5.2 in
    Galaxy A31:
    6.4 in
  • Rear camera layout

    U:
    Single
    Galaxy A31:
    Quad
  • Depth

    U: 0.9 mm thinner

    U:
    7.7 mm
    Galaxy A31:
    8.6 mm
  • Height

    U: 11.7 mm shorter

    U:
    147.6 mm
    Galaxy A31:
    159.3 mm

Physical size

Relative size, not calibrated actual size. Front and side outlines share one scale and a bottom baseline. Generic outlines use recorded body dimensions, excluding camera bumps.

  1. 1. U

    Height:
    147.6 mm
    Width:
    73.2 mm
    Depth:
    7.7 mm
  2. 2. Galaxy A31

    Height:
    159.3 mm +11.7 mm versus U
    Width:
    73.1 mm
    Depth:
    8.6 mm +0.9 mm versus U

Weight

Bars start at zero and share a scale within this chart.

  1. 1. U

    135 g

  2. 2. Galaxy A31

    185 g

    +50 g versus U

Screen size

Approximate rectangular screens calculated from recorded diagonal and aspect ratio at one relative scale. Rounded corners and cutouts are not subtracted. These are not phone outlines or calibrated actual sizes.

  1. 1. U

    Screen diagonal:
    5.2 in
    Aspect ratio (height:width):
    16:9
    Approximate rectangular screen area:
    74.5 cm²
  2. 2. Galaxy A31

    Screen diagonal:
    6.4 in
    Aspect ratio (height:width):
    20:9
    Approximate rectangular screen area:
    98.9 cm²

Galaxy A31 has approximately 32.7% more rectangular screen area than U.

Memory variants

Each row compares the same storage capacity. Cells show recorded RAM alternatives, not combined maxima. Not recorded does not mean unavailable in every market.

Recorded RAM for U, Galaxy A31, compared at the same storage capacity.
StorageUGalaxy A31
32 GB 2 GB RAM Not recorded
64 GB Not recorded 4 GB RAM
128 GB Not recorded 4 / 6 GB RAM Alternative RAM configurations

Practical features

Explicit Yes and No values are shown directly. Qualified or regional records retain their details. Unknown means the record is missing.

1. U

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSD · up to 256 GB

2. Galaxy A31

NFC:
See details Yes (market/region dependent)
Headphone jack:
Yes
Memory card support:
See details microSDXC (dedicated slot)

Battery capacity

Capacity is not battery life. No endurance test is implied.

Recorded battery capacity

Bars start at zero and share a scale within this chart.

  1. 1. U

    3000 mAh

  2. 2. Galaxy A31

    5000 mAh

    +2000 mAh versus U

Specifications

Open a section for more detail. On narrow screens, swipe sideways or use Left/Right arrow keys while the table is focused. Unknown means missing data, not No. Recorded zero values are shown as recorded.

1. U2. Galaxy A31

Everyday essentials
Everyday essentials — specifications for U, Galaxy A31.
SpecificationUGalaxy A31
Dimensions (HxWxD)
  • 147.6 Х 73.2 Х 7.7 mm
  • 159.3 Х 73.1 Х 8.6 mm
Weight
  • 135 g
  • 185 g
Technology
  • IPS LCD
  • Super AMOLED
Screen size
  • 5.2" inch
  • 6.4" inch
Screen resolution
  • 1080 x 1920 px
  • 1080 x 2400 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 32 GB
  • 2 GB RAM
  • 64GB 4GB RAM
  • 128GB 4GB RAM
  • 128GB 6GB RAM
Memory card support
  • microSD
  • up to 256 GB
  • microSDXC (dedicated slot)
Battery Capacity is not battery life. No endurance test is implied.
  • 3000 mAh
  • Non-removable Li-Ion
  • 5000 mAh
  • Non-removable Li-Po
Operating system OS
  • Android 6.0 (Marshmallow)
  • Android 10.0; One UI 2.0
NFC Unknown
  • Yes (market/region dependent)
Headphone jack
  • Yes
  • Yes
Display
Display — specifications for U, Galaxy A31.
SpecificationUGalaxy A31
Touchscreen
  • capacitive touchscreen
  • capacitive touchscreen
Display colors
  • 16M
  • 16M
Screen area
  • 74.5 cm2
  • 98.9 cm2
Screen format
  • 16:9 (height:width)
  • 20:9 (height:width)
Screen to body ratio
  • 69.0%
  • 84.9%
PPI /points per inch/
  • 424 PPI
  • 411 PPI
Camera and Video
Camera and Video — specifications for U, Galaxy A31.
SpecificationUGalaxy A31
Rear camera, main
  • 13 MP
  • Single
  • 48 MP
  • Quad
Camera specs
  • 13 MP
  • AF
  • 48 MP
  • f/2.0
  • 26mm (wide)
  • 1/2.0"
  • 0.8µm
  • PDAF -8 MP
  • f/2.2
  • 13mm (ultrawide)
  • 1/4.0"
  • 1.12µm -5 MP
  • f/2.4
  • (macro) -5 MP
  • (depth)
Functions
  • LED flash
  • HDR
  • panorama
  • LED flash
  • panorama
  • HDR
Video
  • 1080p@30fps
  • 1080p@30fps
Front camera, selfie
  • 8 MP
  • Single
  • 20 MP
  • Single
Specifications
  • 8 MP
  • 20 MP
  • f/2.2
  • (wide)
Performance
Performance — specifications for U, Galaxy A31.
SpecificationUGalaxy A31
Processor CPU
  • Octa-core 1.14 GHz
  • Octa-core (2x2.0 GHz & 6x1.7 GHz)
General specs
General specs — specifications for U, Galaxy A31.
SpecificationUGalaxy A31
Release date
  • 2016
  • October
  • 2020
  • March 24
Colors
  • White
  • Black
  • Pink
  • Prism Crush Black
  • Prism Crush Blue
  • Prism Crush Red
  • Prism Crush White
Communication and Connectivity
Communication and Connectivity — specifications for U, Galaxy A31.
SpecificationUGalaxy A31
SIM card
  • Nano-SIM
  • Single SIM (Nano-SIM)Dual SIM (Nano-SIM
  • dual stand-by)
Network
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 -3G - HSDPA 850 / 900 / 1900 / 2100 -4G - LTE
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only) -3G - HSDPA 850 / 900 / 1900 / 2100 -4G - LTE (unspecified)
Speed
  • HSPA
  • LTE
  • HSPA
  • LTE-A
GPRS
  • Yes
  • Yes
Edge
  • Yes
  • Yes
Wi-Fi
  • Wi-Fi 802.11 b/g/n
  • WiFi Direct
  • hotspot
  • Wi-Fi 802.11 a/b/g/n/ac
  • dual-band
  • Wi-Fi Direct
  • hotspot
GPS
  • Yes
  • with A-GPS
  • Yes
  • with A-GPS
  • GLONASS
  • GALILEO
  • BDS
USB
  • microUSB 2.0
  • 2.0
  • Type-C 1.0 reversible connector
  • USB On-The-Go
Bluetooth
  • 4.0
  • A2DP
  • LE
  • 5.0
  • A2DP
  • LE
Harmful irradiation Unknown
  • SAR EU - 0.49 W/kg (head) 1.68 W/kg (body)
Music and Audio
Music and Audio — specifications for U, Galaxy A31.
SpecificationUGalaxy A31
Radio
  • No
Unknown
Other features
Other features — specifications for U, Galaxy A31.
SpecificationUGalaxy A31
Dop
  • Sensors Accelerometer
  • proximity
  • compass
  • Sensors Fingerprint (under display
  • optical)
  • accelerometer
  • gyro
  • proximity
  • compass - Fast charging 15W