Oppo A31 vs Vodafone Smart first 7

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 first 7: 70 g lighter

    A31:
    180 g
    Smart first 7:
    110 g
  • Width

    Smart first 7: 12.7 mm narrower

    A31:
    75.5 mm
    Smart first 7:
    62.8 mm
  • Screen diagonal

    Smart first 7: 3 in smaller diagonal

    A31:
    6.5 in
    Smart first 7:
    3.5 in
  • Rear camera layout

    A31:
    Triple
    Smart first 7:
    Single
  • Depth

    A31: 3.7 mm thinner

    A31:
    8.3 mm
    Smart first 7:
    12 mm
  • Height

    Smart first 7: 49.5 mm shorter

    A31:
    163.9 mm
    Smart first 7:
    114.4 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. A31

    Height:
    163.9 mm +49.5 mm versus Smart first 7
    Width:
    75.5 mm +12.7 mm versus Smart first 7
    Depth:
    8.3 mm
  2. 2. Smart first 7

    Height:
    114.4 mm
    Width:
    62.8 mm
    Depth:
    12 mm +3.7 mm versus A31

Weight

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

  1. 1. A31

    180 g

    +70 g versus Smart first 7

  2. 2. Smart first 7

    110 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. A31

    Screen diagonal:
    6.5 in
    Aspect ratio (height:width):
    20:9
    Approximate rectangular screen area:
    102 cm²
  2. 2. Smart first 7

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

A31 has approximately 179.6% more rectangular screen area than Smart first 7.

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 A31, Smart first 7, compared at the same storage capacity.
StorageA31Smart first 7
128 GB 4 GB RAM Unknown
Smart first 7: 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. A31

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSDXC (dedicated slot)

2. Smart first 7

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSD · up to 64 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. A31

    4230 mAh

    +2830 mAh versus Smart first 7

  2. 2. Smart first 7

    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. A312. Smart first 7

Everyday essentials
Everyday essentials — specifications for A31, Smart first 7.
SpecificationA31Smart first 7
Dimensions (HxWxD)
  • 163.9 Х 75.5 Х 8.3 mm
  • 114.4 Х 62.8 Х 12 mm
Weight
  • 180 g
  • 110 g
Technology
  • IPS LCD
  • TFT TN
Screen size
  • 6.5" inch
  • 3.5" inch
Screen resolution
  • 720 x 1600 px
  • 320 x 480 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 128GB 4GB RAM
  • 4 GB
  • 512 MB RAM
Memory card support
  • microSDXC (dedicated slot)
  • microSD
  • up to 64 GB (dedicated slot)
Battery Capacity is not battery life. No endurance test is implied.
  • 4230 mAh
  • Non-removable Li-Po
  • 1400 mAh
  • Removable Li-Ion
Operating system OS
  • Android 9.0 (Pie); ColorOS 6.1
  • Android 5.1 (Lollipop)
Chipset
  • Mediatek MT6765V/CB Helio P35 (12nm)
  • Spreadtrum SC7731G
Headphone jack
  • Yes
  • Yes
Display
Display — specifications for A31, Smart first 7.
SpecificationA31Smart first 7
Touchscreen
  • capacitive touchscreen
  • capacitive touchscreen
Display colors
  • 16M
Unknown
Screen area
  • 102.0 cm2
  • 36.5 cm2
Screen format
  • 20:9 (height:width)
  • 3:2 (height:width)
Screen to body ratio
  • 82.4%
  • 50.8%
PPI /points per inch/
  • 270 PPI
  • 165 PPI
Camera and Video
Camera and Video — specifications for A31, Smart first 7.
SpecificationA31Smart first 7
Rear camera, main
  • 12 MP
  • Triple
  • 2 MP
  • Single
Camera specs
  • 12 MP
  • f/1.8
  • (wide)
  • PDAF -2 MP
  • f/2.4
  • 27mm (macro)
  • 1/5.0''
  • 1.75µm -2 MP
  • (depth)
  • 2 MP
Functions
  • HDR
Unknown
Video
  • 1080p@30fps
  • 720p@30fps
Front camera, selfie
  • 8 MP
  • Single
  • 0 MP,
Specifications
  • 8 MP
  • f/2.0
Unknown
Performance

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

Performance — specifications for A31, Smart first 7.
SpecificationA31Smart first 7
Processor CPU
  • Octa-core (4x2.3 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53)
  • Quad-core 1.3 GHz Cortex-A7
Graphics processor GPU
  • PowerVR GE8320
  • Mali-400MP2
Antutu 8 score *
  • 105221
Unknown
General specs
General specs — specifications for A31, Smart first 7.
SpecificationA31Smart first 7
Release date
  • 2020
  • February 13
  • 2016
  • May
Colors
  • Fantasy White
  • Mystery Black
  • Volcano Black
  • Tech White
Historical recorded price Legacy catalogue value; date unknown. Not a current offer.
  • 180 EUR
  • 30 EUR
Battery life Unknown
  • Talking time- Up to 5 h (3G)
Body build
  • Glass front
  • plastic back
  • plastic frame
Unknown
Communication and Connectivity
Communication and Connectivity — specifications for A31, Smart first 7.
SpecificationA31Smart first 7
SIM card
  • Dual SIM (Nano-SIM
  • dual stand-by)
  • Mini-SIM
Network
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 -3G - HSDPA 850 / 900 / 2100 -4G - LTE (unspecified)
  • Show all network frequencies: -2G - GSM 900 / 1800
Speed
  • HSPA 42.2/5.76 Mbps
  • LTE-A
  • HSPA 21.1/5.76 Mbps
GPRS
  • Yes
  • Yes
Edge
  • Yes
  • Yes
Wi-Fi
  • Wi-Fi 802.11 a/b/g/n/ac
  • dual-band
  • Wi-Fi Direct
  • hotspot
  • Wi-Fi 802.11 b/g/n
  • hotspot
GPS
  • Yes
  • with A-GPS
  • BDS
  • A-GPS only
USB
  • microUSB 2.0
  • USB On-The-Go
  • microUSB 2.0
Bluetooth
  • 5.0
  • A2DP
  • LE
  • 2.1
  • A2DP
Music and Audio
Music and Audio — specifications for A31, Smart first 7.
SpecificationA31Smart first 7
Radio
  • FM radio
  • FM radio
Others
  • 480 nits typ. brightness
Unknown
Other features
Other features — specifications for A31, Smart first 7.
SpecificationA31Smart first 7
Dop
  • Sensors Fingerprint (rear-mounted)
  • accelerometer
  • proximity
  • compass
  • Sensors No