BLU J2 vs Micromax Bolt A51

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

    Bolt A51: 28 g lighter

    J2:
    146 g
    Bolt A51:
    118 g
  • Width

    Bolt A51: 10.6 mm narrower

    J2:
    73.1 mm
    Bolt A51:
    62.5 mm
  • Screen diagonal

    Bolt A51: 1.5 in smaller diagonal

    J2:
    5 in
    Bolt A51:
    3.5 in
  • Depth

    J2: 2.5 mm thinner

    J2:
    10.3 mm
    Bolt A51:
    12.8 mm
  • Height

    Bolt A51: 25.5 mm shorter

    J2:
    144 mm
    Bolt A51:
    118.5 mm
  • Release year

    J2:
    2019
    Bolt A51:
    2013

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. J2

    Height:
    144 mm +25.5 mm versus Bolt A51
    Width:
    73.1 mm +10.6 mm versus Bolt A51
    Depth:
    10.3 mm
  2. 2. Bolt A51

    Height:
    118.5 mm
    Width:
    62.5 mm
    Depth:
    12.8 mm +2.5 mm versus J2

Weight

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

  1. 1. J2

    146 g

    +28 g versus Bolt A51

  2. 2. Bolt A51

    118 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. J2

    Screen diagonal:
    5 in
    Aspect ratio (height:width):
    16:9
    Approximate rectangular screen area:
    68.9 cm²
  2. 2. Bolt A51

    Screen diagonal:
    3.5 in
    Aspect ratio (height:width):
    3:2
    Approximate rectangular screen area:
    36.5 cm²

J2 has approximately 88.9% more rectangular screen area than Bolt A51.

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 J2, Bolt A51, compared at the same storage capacity.
StorageJ2Bolt A51
32 GB 1 GB RAM Unknown
Bolt A51: Original memory entry

512 MB · 256 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. J2

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSDXC

2. Bolt A51

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSD · up to 32 GB (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. J2

    2000 mAh

    +500 mAh versus Bolt A51

  2. 2. Bolt A51

    1500 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. J22. Bolt A51

Everyday essentials
Everyday essentials — specifications for J2, Bolt A51.
SpecificationJ2Bolt A51
Dimensions (HxWxD)
  • 144 Х 73.1 Х 10.3 mm
  • 118.5 Х 62.5 Х 12.8 mm
Weight
  • 146 g
  • 118 g
Technology
  • IPS LCD
  • TFT
Screen size
  • 5" inch
  • 3.5" inch
Screen resolution
  • 480 x 854 px
  • 320 x 480 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 32GB 1GB RAM
  • 512 MB
  • 256 MB RAM
Memory card support
  • microSDXC
  • microSD
  • up to 32 GB (dedicated slot)
Battery Capacity is not battery life. No endurance test is implied.
  • 2000 mAh
  • Li-Po
  • 1500 mAh
  • Removable Li-Ion
Operating system OS
  • Android 8.1 Oreo (Go edition)
  • Android 2.3.7 (Gingerbread)
Headphone jack
  • Yes
  • Yes
Display
Display — specifications for J2, Bolt A51.
SpecificationJ2Bolt A51
Touchscreen
  • capacitive touchscreen
  • touchscreen
Display colors
  • 16M
Unknown
Screen area
  • 68.9 cm2
  • 36.5 cm2
Screen format
  • 16:9 (height:width)
  • 3:2 (height:width)
Screen to body ratio
  • 65.4%
  • 49.3%
PPI /points per inch/
  • 196 PPI
  • 165 PPI
Camera and Video
Camera and Video — specifications for J2, Bolt A51.
SpecificationJ2Bolt A51
Rear camera, main
  • 5 MP
  • Single
  • 2 MP
  • Single
Camera specs
  • 5 MP
  • 2 MP
Functions
  • LED flash
  • LED flash
Video
  • 720p@30fps
  • Yes
Front camera, selfie
  • 5 MP
  • Single
  • 0.3 MP
  • Single
Specifications
  • 5 MP
  • VGA
Performance
Performance — specifications for J2, Bolt A51.
SpecificationJ2Bolt A51
Processor CPU
  • Quad-core 1.3 GHz Cortex-A7
  • 832 MHz
Graphics processor GPU
  • Mali-400
Unknown
General specs
General specs — specifications for J2, Bolt A51.
SpecificationJ2Bolt A51
Release date
  • 2019
  • December
  • 2013
  • April
Colors
  • Blue
  • Black
  • Brown
  • Black/Silver
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.
  • 50 EUR
  • 70 EUR
Battery life Unknown
  • Stand by time- Up to 140 h Talking time- Up to 4 h 30 min
Communication and Connectivity
Communication and Connectivity — specifications for J2, Bolt A51.
SpecificationJ2Bolt A51
SIM card
  • Dual SIM (Nano-SIM
  • dual stand-by)
  • Dual SIM
Network
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
  • Show all network frequencies: -2G - GSM 900 / 1800 - SIM 1 & SIM 2
Speed
  • HSPA 21.1/5.76 Mbps
  • HSPA
GPRS
  • Yes
  • Class 12
Edge
  • Yes
  • Class 32
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
  • No
USB
  • microUSB 2.0
  • microUSB
Bluetooth
  • 4.1
  • A2DP
  • LE
  • 3.0
Music and Audio
Music and Audio — specifications for J2, Bolt A51.
SpecificationJ2Bolt A51
Radio
  • FM radio
  • FM radio
Other features
Other features — specifications for J2, Bolt A51.
SpecificationJ2Bolt A51
Dop
  • Sensors Accelerometer For USA
  • Sensors Accelerometer