Haier G51 vs Karbonn Smart A12 Star

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.

  • Weight

    Smart A12 Star: 25 g lighter

    G51:
    155 g
    Smart A12 Star:
    130 g
  • Width

    Smart A12 Star: 8.7 mm narrower

    G51:
    72.9 mm
    Smart A12 Star:
    64.2 mm
  • Screen diagonal

    Smart A12 Star: 1 in smaller diagonal

    G51:
    5 in
    Smart A12 Star:
    4 in
  • Depth

    G51: 1 mm thinner

    G51:
    9.1 mm
    Smart A12 Star:
    10.1 mm
  • Height

    Smart A12 Star: 18.4 mm shorter

    G51:
    142.6 mm
    Smart A12 Star:
    124.2 mm
  • Release year

    G51:
    2017
    Smart A12 Star:
    2014

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. G51

    Height:
    142.6 mm +18.4 mm versus Smart A12 Star
    Width:
    72.9 mm +8.7 mm versus Smart A12 Star
    Depth:
    9.1 mm
  2. 2. Smart A12 Star

    Height:
    124.2 mm
    Width:
    64.2 mm
    Depth:
    10.1 mm +1 mm versus G51

Weight

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

  1. 1. G51

    155 g

    +25 g versus Smart A12 Star

  2. 2. Smart A12 Star

    130 g

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. G51

    Screen diagonal:
    5 in
    Aspect ratio (height:width):
    16:9
    Approximate rectangular screen area:
    68.9 cm²
  2. 2. Smart A12 Star

    Screen diagonal:
    4 in
    Aspect ratio (height:width):
    5:3
    Approximate rectangular screen area:
    45.5 cm²

G51 has approximately 51.3% more rectangular screen area than Smart A12 Star.

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 G51, Smart A12 Star, compared at the same storage capacity.
StorageG51Smart A12 Star
8 GB 1 GB RAM Unknown
Smart A12 Star: Original memory entry

4 GB · 512 MB RAM

Practical features

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

1. G51

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

2. Smart A12 Star

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSD · up to 32 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. G51

    2000 mAh

    +600 mAh versus Smart A12 Star

  2. 2. Smart A12 Star

    1400 mAh

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. G512. Smart A12 Star

Everyday essentials
Everyday essentials — specifications for G51, Smart A12 Star.
SpecificationG51Smart A12 Star
Dimensions (HxWxD)
  • 142.6 Х 72.9 Х 9.1 mm
  • 124.2 Х 64.2 Х 10.1 mm
Weight
  • 155 g
  • 130 g
Technology
  • IPS LCD
  • IPS LCD
Screen size
  • 5" inch
  • 4" inch
Screen resolution
  • 480 x 854 px
  • 480 x 800 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 8 GB
  • 1 GB RAM
  • 4 GB
  • 512 MB RAM
Memory card support
  • microSD
  • up to 32 GB (dedicated slot)
  • microSD
  • up to 32 GB
Battery Capacity is not battery life. No endurance test is implied.
  • 2000 mAh
  • Removable Li-Ion
  • 1400 mAh
  • Li-Ion
Operating system OS
  • Android 7.0 (Nougat)
  • Android 4.4.2 (KitKat)
Chipset
  • Mediatek MT6737M (28 nm)
Unknown
Headphone jack
  • Yes
  • Yes
Display
Display — specifications for G51, Smart A12 Star.
SpecificationG51Smart A12 Star
Touchscreen
  • capacitive touchscreen
  • capacitive touchscreen
Display colors
  • 16M
  • 16M
Screen area
  • 68.9 cm2
  • 45.5 cm2
Screen format
  • 16:9 (height:width)
  • 5:3 (height:width)
Screen to body ratio
  • 66.3%
  • 57.1%
PPI /points per inch/
  • 196 PPI
  • 233 PPI
Screen protection
  • Scratch-resistant glass
Unknown
Camera and Video
Camera and Video — specifications for G51, Smart A12 Star.
SpecificationG51Smart A12 Star
Rear camera, main
  • 5 MP
  • Single
  • 5 MP
  • Single
Camera specs
  • 5 MP
  • AF
  • f/2.0
  • 5 MP
Functions
  • Dual-LED dual-tone flash
  • LED flash
Video
  • 720p@30fps
  • Yes
Front camera, selfie
  • 5 MP
  • Single
  • 0.3 MP
  • Single
Specifications
  • 5 MP
  • f/2.4
  • VGA
Performance

Scores marked * are historical catalogue entries. Test conditions are unspecified; no new testing is implied.

Performance — specifications for G51, Smart A12 Star.
SpecificationG51Smart A12 Star
Processor CPU
  • Quad-core 1.25 GHz Cortex-A53
  • Dual-core 1.2 GHz
Graphics processor GPU
  • Mali-T720MP1
Unknown
Antutu 7 score *
  • 29322
Unknown
General specs
General specs — specifications for G51, Smart A12 Star.
SpecificationG51Smart A12 Star
Release date
  • 2017
  • 2014
  • July
Colors
  • Black
  • Gold
  • White
  • Blue
  • Black
Historical recorded price Legacy catalogue value; date unknown. Not a current offer. Unknown
  • 50 EUR
Battery life Unknown
  • Stand by time- Up to 300 h
Communication and Connectivity
Communication and Connectivity — specifications for G51, Smart A12 Star.
SpecificationG51Smart A12 Star
SIM card
  • Dual SIM (Micro-SIM
  • dual stand-by)
  • Dual SIM (Micro-SIM
  • dual stand-by)
Network
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 -3G - HSDPA 900 / 2100 HSDPA 850 / 1900 -4G - LTE band 1(2100)
  • 3(1800)
  • 7(2600)
  • 8(900)
  • 20(800) LTE band 2(1900)
  • 4(1700/2100)
  • 5(850)
  • Show all network frequencies: -2G - GSM 900 / 1800 - SIM 1 & SIM 2
Speed
  • HSPA 42.2/11.5 Mbps
  • LTE Cat4 150/50 Mbps
  • HSPA
GPRS
  • Yes
  • Yes
Edge
  • Yes
  • Yes
Wi-Fi
  • Wi-Fi 802.11 b/g/n
  • Wi-Fi Direct
  • hotspot
  • Wi-Fi 802.11 b/g/n
  • hotspot
GPS
  • Yes
  • with A-GPS
  • Yes
  • with A-GPS
USB
  • microUSB 2.0
  • microUSB 2.0
Bluetooth
  • 4.0
  • A2DP
  • LE
  • 2.0
Harmful irradiation
  • SAR EU - 0.71 W/kg (head) 1.11 W/kg (body)
  • SAR EU - 0.79 W/kg (head)
Music and Audio
Music and Audio — specifications for G51, Smart A12 Star.
SpecificationG51Smart A12 Star
Radio
  • FM radio
  • FM radio
Other features
Other features — specifications for G51, Smart A12 Star.
SpecificationG51Smart A12 Star
Dop
  • Sensors Accelerometer
  • proximity
  • Sensors Accelerometer
  • proximity