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Karbonn A4 vs LG U

Compare recorded specifications, size and practical differences.

+ Add a third phone

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.

  • Weight

    A4: 60 g lighter

    A4:
    75 g
    U:
    135 g
  • Width

    A4: 7.2 mm narrower

    A4:
    66 mm
    U:
    73.2 mm
  • Screen diagonal

    A4: 1.2 in smaller diagonal

    A4:
    4 in
    U:
    5.2 in
  • Depth

    U: 1.8 mm thinner

    A4:
    9.5 mm
    U:
    7.7 mm
  • Height

    A4: 22.8 mm shorter

    A4:
    124.8 mm
    U:
    147.6 mm
  • Release year

    A4:
    2013
    U:
    2016

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. A4

    Height:
    124.8 mm
    Width:
    66 mm
    Depth:
    9.5 mm +1.8 mm versus U
  2. 2. U

    Height:
    147.6 mm +22.8 mm versus A4
    Width:
    73.2 mm +7.2 mm versus A4
    Depth:
    7.7 mm

Weight

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

  1. 1. A4

    75 g

  2. 2. U

    135 g

    +60 g versus A4

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. A4

    Screen diagonal:
    4 in
    Aspect ratio (height:width):
    3:2
    Approximate rectangular screen area:
    47.6 cm²
  2. 2. U

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

U has approximately 56.5% more rectangular screen area than A4.

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 A4, U, compared at the same storage capacity.
StorageA4U
32 GB Unknown 2 GB RAM
A4: Original memory entry

256 MB · 512 MB

Practical features

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

1. A4

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSD · up to 32 GB (dedicated slot)

2. U

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

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. A4

    1400 mAh

  2. 2. U

    3000 mAh

    +1600 mAh versus A4

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. A42. U

Everyday essentials
Everyday essentials — specifications for A4, U.
SpecificationA4U
Dimensions (HxWxD)
  • 124.8 Х 66 Х 9.5 mm
  • 147.6 Х 73.2 Х 7.7 mm
Weight
  • 75 g
  • 135 g
Technology
  • TFT
  • IPS LCD
Screen size
  • 4" inch
  • 5.2" inch
Screen resolution
  • 320 x 480 px
  • 1080 x 1920 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 256 MB
  • 512 MB
  • 32 GB
  • 2 GB RAM
Memory card support
  • microSD
  • up to 32 GB (dedicated slot)
  • microSD
  • up to 256 GB
Battery Capacity is not battery life. No endurance test is implied.
  • 1400 mAh
  • Li-Ion
  • 3000 mAh
  • Non-removable Li-Ion
Operating system OS
  • Android 2.3.6 (Gingerbread)
  • Android 6.0 (Marshmallow)
Headphone jack
  • Yes
  • Yes
Display
Display — specifications for A4, U.
SpecificationA4U
Touchscreen
  • capacitive touchscreen
  • capacitive touchscreen
Display colors
  • 256K
  • 16M
Screen area
  • 47.6 cm2
  • 74.5 cm2
Screen format
  • 3:2 (height:width)
  • 16:9 (height:width)
Screen to body ratio
  • 57.8%
  • 69.0%
PPI /points per inch/
  • 144 PPI
  • 424 PPI
Camera and Video
Camera and Video — specifications for A4, U.
SpecificationA4U
Rear camera, main
  • 3.15 MP
  • Single
  • 13 MP
  • Single
Camera specs
  • 3.15 MP
  • 13 MP
  • AF
Functions Unknown
  • LED flash
  • HDR
  • panorama
Video
  • Yes
  • 1080p@30fps
Front camera, selfie
  • 0.3 MP
  • Single
  • 8 MP
  • Single
Specifications Unknown
  • 8 MP
Performance
Performance — specifications for A4, U.
SpecificationA4U
Processor CPU Unknown
  • Octa-core 1.14 GHz
General specs
General specs — specifications for A4, U.
SpecificationA4U
Release date
  • 2013
  • March
  • 2016
  • October
Colors
  • white/black
  • White
  • Black
  • Pink
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.
  • 70 EUR
Unknown
Battery life
  • Stand by time- Up to 250 h Talking time- Up to 4 h 20 min
Unknown
Communication and Connectivity
Communication and Connectivity — specifications for A4, U.
SpecificationA4U
SIM card
  • Dual SIM (Mini-SIM)
  • Nano-SIM
Network
  • Show all network frequencies: -2G - GSM 850 / 1900 - SIM 1 & SIM 2 GSM 900 / 1800 - SIM 1 & SIM 2
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 -3G - HSDPA 850 / 900 / 1900 / 2100 -4G - LTE
Speed
  • HSPA
  • HSPA
  • LTE
GPRS
  • Yes
  • Yes
Edge
  • Yes
  • Yes
Wi-Fi
  • Wi-Fi 802.11 b/g/n
  • hotspot
  • Wi-Fi 802.11 b/g/n
  • WiFi Direct
  • hotspot
GPS
  • No
  • Yes
  • with A-GPS
USB
  • Proprietary
  • microUSB 2.0
Bluetooth
  • Yes
  • 4.0
  • A2DP
  • LE
Music and Audio
Music and Audio — specifications for A4, U.
SpecificationA4U
Radio
  • FM radio
  • No
Other features
Other features — specifications for A4, U.
SpecificationA4U
Dop
  • Sensors Accelerometer
  • Sensors Accelerometer
  • proximity
  • compass