Oppo A31 vs Samsung Galaxy J2 Pro (2018)
Compare recorded specifications, size and practical differences.
Samsung Galaxy J2 Pro (2018)
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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.
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Display technology
OLED versus LCD
- A31:
- LCD
- Galaxy J2 Pro (2018):
- OLED
-
Weight
Galaxy J2 Pro (2018): 27 g lighter
- A31:
- 180 g
- Galaxy J2 Pro (2018):
- 153 g
-
Width
Galaxy J2 Pro (2018): 3.2 mm narrower
- A31:
- 75.5 mm
- Galaxy J2 Pro (2018):
- 72.3 mm
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Screen diagonal
Galaxy J2 Pro (2018): 1.5 in smaller diagonal
- A31:
- 6.5 in
- Galaxy J2 Pro (2018):
- 5 in
-
Rear camera layout
- A31:
- Triple
- Galaxy J2 Pro (2018):
- Single
-
Height
Galaxy J2 Pro (2018): 20.1 mm shorter
- A31:
- 163.9 mm
- Galaxy J2 Pro (2018):
- 143.8 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. A31
- Height:
- 163.9 mm +20.1 mm versus Galaxy J2 Pro (2018)
- Width:
- 75.5 mm +3.2 mm versus Galaxy J2 Pro (2018)
- Depth:
- 8.3 mm
2. Galaxy J2 Pro (2018)
- Height:
- 143.8 mm
- Width:
- 72.3 mm
- Depth:
- 8.4 mm
Weight
Bars start at zero and share a scale within this chart.
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. A31
- Screen diagonal:
- 6.5 in
- Aspect ratio (height:width):
- 20:9
- Approximate rectangular screen area:
- 102 cm²
2. Galaxy J2 Pro (2018)
- Screen diagonal:
- 5 in
- Aspect ratio (height:width):
- 16:9
- Approximate rectangular screen area:
- 68.9 cm²
A31 has approximately 48% more rectangular screen area than Galaxy J2 Pro (2018).
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.
| Storage | A31 | Galaxy J2 Pro (2018) |
|---|---|---|
| 128 GB | 4 GB RAM | Unknown |
Galaxy J2 Pro (2018): Original memory entry
16 GB · 1.5 GB RAM 2 GB RAM (India only)
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. Galaxy J2 Pro (2018)
- NFC:
- Unknown
- Headphone jack:
- Yes
- Memory card support:
- See details microSD · up to 256 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.
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. Galaxy J2 Pro (2018)
Everyday essentials
| Specification | A31 | Galaxy J2 Pro (2018) |
|---|---|---|
| Dimensions (HxWxD) |
|
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| Weight |
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| Technology |
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| Screen size |
|
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| Screen resolution |
|
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| Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded. |
|
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| Memory card support |
|
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| Battery Capacity is not battery life. No endurance test is implied. |
|
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| Operating system OS |
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| Chipset |
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| Headphone jack |
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Display
| Specification | A31 | Galaxy J2 Pro (2018) |
|---|---|---|
| Touchscreen |
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| Display colors |
|
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| Screen area |
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| Screen format |
|
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| Screen to body ratio |
|
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| PPI /points per inch/ |
|
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| Screen protection | Unknown |
|
Camera and Video
Scores marked * are historical catalogue entries. Test conditions are unspecified; no new testing is implied.
| Specification | A31 | Galaxy J2 Pro (2018) |
|---|---|---|
| Rear camera, main |
|
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| Camera specs |
|
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| Functions |
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| Video |
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| Front camera, selfie |
|
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| Specifications |
|
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| DxOMark Main Score * | Unknown |
|
| DxOMark Photo * | Unknown |
|
| DxOMark Video * | Unknown |
|
Performance
Scores marked * are historical catalogue entries. Test conditions are unspecified; no new testing is implied.
| Specification | A31 | Galaxy J2 Pro (2018) |
|---|---|---|
| Processor CPU |
|
|
| Graphics processor GPU |
|
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| GeekBench 4 Single Core * | Unknown |
|
| GeekBench 4 Multi-Core * | Unknown |
|
| Antutu 8 score * |
|
Unknown |
General specs
| Specification | A31 | Galaxy J2 Pro (2018) |
|---|---|---|
| Release date |
|
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| Colors |
|
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| Historical recorded price Legacy catalogue value; date unknown. Not a current offer. |
|
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| Battery life | Unknown |
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| Body build |
|
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Communication and Connectivity
| Specification | A31 | Galaxy J2 Pro (2018) |
|---|---|---|
| SIM card |
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| Network |
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| Speed |
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| GPRS |
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| Edge |
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| Wi-Fi |
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| GPS |
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| USB |
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| Bluetooth |
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| Harmful irradiation | Unknown |
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Music and Audio
| Specification | A31 | Galaxy J2 Pro (2018) |
|---|---|---|
| Radio |
|
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| Others |
|
Unknown |
Other features
| Specification | A31 | Galaxy J2 Pro (2018) |
|---|---|---|
| Dop |
|
|
