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Apple iPhone 3G vs Samsung Galaxy A31

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

      iPhone 3G: 52 g lighter

      iPhone 3G:
      133 g
      Galaxy A31:
      185 g

    • Width

      iPhone 3G: 11 mm narrower

      iPhone 3G:
      62.1 mm
      Galaxy A31:
      73.1 mm

    • Screen diagonal

      iPhone 3G: 2.9 in smaller diagonal

      iPhone 3G:
      3.5 in
      Galaxy A31:
      6.4 in

    • Rear camera layout

      iPhone 3G:
      Single
      Galaxy A31:
      Quad

    • Depth

      Galaxy A31: 3.7 mm thinner

      iPhone 3G:
      12.3 mm
      Galaxy A31:
      8.6 mm

    • Height

      iPhone 3G: 43.8 mm shorter

      iPhone 3G:
      115.5 mm
      Galaxy A31:
      159.3 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. iPhone 3G

      Height:
      115.5 mm
      Width:
      62.1 mm
      Depth:
      12.3 mm +3.7 mm versus Galaxy A31

    2. 2. Galaxy A31

      Height:
      159.3 mm +43.8 mm versus iPhone 3G
      Width:
      73.1 mm +11 mm versus iPhone 3G
      Depth:
      8.6 mm

    Weight

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

    1. 1. iPhone 3G

      133 g

    2. 2. Galaxy A31

      185 g

      +52 g versus iPhone 3G

    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. iPhone 3G

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

    2. 2. Galaxy A31

      Screen diagonal:
      6.4 in
      Aspect ratio (height:width):
      20:9
      Approximate rectangular screen area:
      98.9 cm²

    Galaxy A31 has approximately 171.1% more rectangular screen area than iPhone 3G.

    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 iPhone 3G, Galaxy A31, compared at the same storage capacity.
    StorageiPhone 3GGalaxy A31
    64 GB Unknown 4 GB RAM
    128 GB Unknown 4 / 6 GB RAM Alternative RAM configurations
    iPhone 3G: Original memory entry

    8/16 GB · 128 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. iPhone 3G

    NFC:
    Unknown
    Headphone jack:
    Yes
    Memory card support:
    No

    2. Galaxy A31

    NFC:
    See details Yes (market/region dependent)
    Headphone jack:
    Yes
    Memory card support:
    See details microSDXC (dedicated slot)

    Battery capacity

    Capacity is not battery life. No endurance test is implied.

    At least two unambiguous positive capacity values are needed for a chart. Original entries remain in the specifications.

    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. iPhone 3G2. Galaxy A31

    Everyday essentials
    Everyday essentials — specifications for iPhone 3G, Galaxy A31.
    SpecificationiPhone 3GGalaxy A31
    Dimensions (HxWxD)
    • 115.5 Х 62.1 Х 12.3 mm
    • 159.3 Х 73.1 Х 8.6 mm
    Weight
    • 133 g
    • 185 g
    Technology
    • TFT
    • Super AMOLED
    Screen size
    • 3.5" inch
    • 6.4" inch
    Screen resolution
    • 320 x 480 px
    • 1080 x 2400 px
    Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
    • 8/16 GB
    • 128 MB RAM
    • 64GB 4GB RAM
    • 128GB 4GB RAM
    • 128GB 6GB RAM
    Memory card support
    • No
    • microSDXC (dedicated slot)
    Battery Capacity is not battery life. No endurance test is implied.
    • 0 mAh,
    • 5000 mAh
    • Non-removable Li-Po
    Operating system OS
    • iOS
    • upgradable to iOS 4.2.1
    • Android 10.0; One UI 2.0
    NFC Unknown
    • Yes (market/region dependent)
    Headphone jack
    • Yes
    • Yes
    Display
    Display — specifications for iPhone 3G, Galaxy A31.
    SpecificationiPhone 3GGalaxy A31
    Touchscreen
    • capacitive touchscreen
    • capacitive touchscreen
    Display colors
    • 16M
    • 16M
    Screen area
    • 36.5 cm2
    • 98.9 cm2
    Screen format
    • 3:2 (height:width)
    • 20:9 (height:width)
    Screen to body ratio
    • 50.9%
    • 84.9%
    PPI /points per inch/
    • 165 PPI
    • 411 PPI
    Screen protection
    • Corning Gorilla Glass
    • oleophobic coating
    		 Unknown
    Camera and Video
    Camera and Video — specifications for iPhone 3G, Galaxy A31.
    SpecificationiPhone 3GGalaxy A31
    Rear camera, main
    • 2 MP
    • Single
    • 48 MP
    • Quad
    Camera specs
    • 2 MP
    • 48 MP
    • f/2.0
    • 26mm (wide)
    • 1/2.0"
    • 0.8µm
    • PDAF -8 MP
    • f/2.2
    • 13mm (ultrawide)
    • 1/4.0"
    • 1.12µm -5 MP
    • f/2.4
    • (macro) -5 MP
    • (depth)
    Functions Unknown
    • LED flash
    • panorama
    • HDR
    Video
    • No
    • 1080p@30fps
    Front camera, selfie
    • 0 MP,
    • 20 MP
    • Single
    Specifications Unknown
    • 20 MP
    • f/2.2
    • (wide)
    Performance
    Performance — specifications for iPhone 3G, Galaxy A31.
    SpecificationiPhone 3GGalaxy A31
    Processor CPU
    • 412 MHz ARM 11
    • Octa-core (2x2.0 GHz & 6x1.7 GHz)
    Graphics processor GPU
    • PowerVR MBX
    		 Unknown
    General specs
    General specs — specifications for iPhone 3G, Galaxy A31.
    SpecificationiPhone 3GGalaxy A31
    Release date
    • 2008
    • June
    • 2020
    • March 24
    Colors
    • Black(8/16 GB)
    • White (16 GB)
    • Prism Crush Black
    • Prism Crush Blue
    • Prism Crush Red
    • Prism Crush White
    Historical recorded price Legacy catalogue value; date unknown. Not a current offer.
    • 90 EUR
    		 Unknown
    Battery life
    • Stand by time- Up to 300 h Talking time- Up to 10 h Music play - Up to 24 h
    		 Unknown
    Communication and Connectivity
    Communication and Connectivity — specifications for iPhone 3G, Galaxy A31.
    SpecificationiPhone 3GGalaxy A31
    SIM card
    • Mini-SIM
    • Single SIM (Nano-SIM)Dual SIM (Nano-SIM
    • dual stand-by)
    Network
    • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900
    • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only) -3G - HSDPA 850 / 900 / 1900 / 2100 -4G - LTE (unspecified)
    Speed
    • HSPA
    • HSPA
    • LTE-A
    GPRS
    • Yes
    • Yes
    Edge
    • Yes
    • Yes
    Wi-Fi
    • Wi-Fi 802.11b/g
    • Wi-Fi 802.11 a/b/g/n/ac
    • dual-band
    • Wi-Fi Direct
    • hotspot
    GPS
    • Yes
    • with A-GPS
    • Yes
    • with A-GPS
    • GLONASS
    • GALILEO
    • BDS
    USB
    • 2.0
    • 2.0
    • Type-C 1.0 reversible connector
    • USB On-The-Go
    Bluetooth
    • 2.0
    • A2DP (headset support only)
    • 5.0
    • A2DP
    • LE
    Harmful irradiation
    • SAR - 0.52 W/kg (head) 1.29 W/kg (body) SAR EU - 0.56 W/kg (head) 0.23 W/kg (body)
    • SAR EU - 0.49 W/kg (head) 1.68 W/kg (body)
    Music and Audio
    Music and Audio — specifications for iPhone 3G, Galaxy A31.
    SpecificationiPhone 3GGalaxy A31
    Radio
    • No
    		 Unknown
    Other features
    Other features — specifications for iPhone 3G, Galaxy A31.
    SpecificationiPhone 3GGalaxy A31
    Dop
    • Sensors Accelerometer
    • proximity - Audio/video player -TV-out -Organizer -Document viewer -Photo viewer -Predictive text input
    • Sensors Fingerprint (under display
    • optical)
    • accelerometer
    • gyro
    • proximity
    • compass - Fast charging 15W

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