Micromax A28 Bolt vs Xolo A42

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.

  • Width

    A28 Bolt: 1 mm narrower

    A28 Bolt:
    62.5 mm
    A42:
    63.5 mm
  • Screen diagonal

    A28 Bolt: 0.5 in smaller diagonal

    A28 Bolt:
    3.5 in
    A42:
    4 in
  • Depth

    A42: 2.3 mm thinner

    A28 Bolt:
    12.5 mm
    A42:
    10.2 mm
  • Height

    A28 Bolt: 7.6 mm shorter

    A28 Bolt:
    116.9 mm
    A42:
    124.5 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. A28 Bolt

    Height:
    116.9 mm
    Width:
    62.5 mm
    Depth:
    12.5 mm +2.3 mm versus A42
    Weight:
    89 g
  2. 2. A42

    Height:
    124.5 mm +7.6 mm versus A28 Bolt
    Width:
    63.5 mm +1 mm versus A28 Bolt
    Depth:
    10.2 mm
    Weight:
    Unknown

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. A28 Bolt

    Screen diagonal:
    3.5 in
    Aspect ratio (height:width):
    3:2
    Approximate rectangular screen area:
    36.5 cm²
  2. 2. A42

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

A42 has approximately 24.8% more rectangular screen area than A28 Bolt.

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.

No unambiguous storage/RAM pairings are recorded. See the original specifications below.

A28 Bolt: Original memory entry

512 MB · 256 MB RAM

A42: 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. A28 Bolt

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

2. A42

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. A28 Bolt

    1500 mAh

    +100 mAh versus A42

  2. 2. A42

    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. A28 Bolt2. A42

Everyday essentials
Everyday essentials — specifications for A28 Bolt, A42.
SpecificationA28 BoltA42
Dimensions (HxWxD)
  • 116.9 Х 62.5 Х 12.5 mm
  • 124.5 Х 63.5 Х 10.2 mm
Weight
  • 89 g
  • 0 g
Technology
  • TFT
  • IPS LCD
Screen size
  • 3.5" inch
  • 4" inch
Screen resolution
  • 320 x 480 px
  • 480 x 800 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 512 MB
  • 256 MB 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.
  • 1500 mAh
  • Removable Li-Ion
  • 1400 mAh
  • Li-Ion
Operating system OS
  • Android 2.3 (Gingerbread)
  • Android 4.2.2 (Jelly Bean)
Headphone jack
  • Yes
  • Yes
Display
Display — specifications for A28 Bolt, A42.
SpecificationA28 BoltA42
Touchscreen
  • capacitive touchscreen
  • capacitive touchscreen
Display colors
  • 65K
  • 16M
Screen area
  • 36.5 cm2
  • 45.5 cm2
Screen format
  • 3:2 (height:width)
  • 5:3 (height:width)
Screen to body ratio
  • 49.9%
  • 57.6%
PPI /points per inch/
  • 165 PPI
  • 233 PPI
Camera and Video
Camera and Video — specifications for A28 Bolt, A42.
SpecificationA28 BoltA42
Rear camera, main
  • 0.3 MP
  • Single
  • 5 MP
  • Single
Camera specs Unknown
  • 5 MP
Video
  • 320p
  • Yes
Front camera, selfie
  • 0.3 MP
  • Single
  • 1.3 MP
  • Single
Specifications
  • VGA
  • 1.3 MP
Performance
Performance — specifications for A28 Bolt, A42.
SpecificationA28 BoltA42
Processor CPU
  • 1.0 GHz Cortex-A5
  • Dual-core 1.3 GHz
Graphics processor GPU
  • Mali-300
Unknown
General specs
General specs — specifications for A28 Bolt, A42.
SpecificationA28 BoltA42
Release date
  • 2014
  • 2014
  • July
Colors
  • Black
  • Yellow
  • Blue
  • White
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.
  • 40 EUR
  • 80 EUR
Battery life
  • Stand by time- Up to 260 h Talking time- Up to 4 h
  • Stand by time- Up to 180 h Talking time- Up to 5 h
Communication and Connectivity
Communication and Connectivity — specifications for A28 Bolt, A42.
SpecificationA28 BoltA42
SIM card
  • Dual SIM (Mini-SIM)
  • Dual SIM
Network Unknown
  • Show all network frequencies: -2G - GSM 900 / 1800 - SIM 1 & SIM 2
Speed Unknown
  • HSPA
GPRS
  • Class 12
  • Yes
Edge
  • Yes
  • Yes
Wi-Fi
  • Wi-Fi 802.11 b/g/n
  • Wi-Fi 802.11 b/g/n
  • hotspot
GPS
  • No
  • Yes
  • with A-GPS
USB
  • microUSB
  • microUSB
Bluetooth
  • 2.1
  • A2DP
  • 2.0
Harmful irradiation Unknown
  • SAR EU - 0.69 W/kg (head) 0.71 W/kg (body)
Music and Audio
Music and Audio — specifications for A28 Bolt, A42.
SpecificationA28 BoltA42
Radio
  • FM radio
  • recording
  • FM radio
Other features
Other features — specifications for A28 Bolt, A42.
SpecificationA28 BoltA42
Dop Unknown
  • Sensors Accelerometer
  • proximity