Karbonn Smart A12 Star vs Xolo Opus HD
Compare recorded specifications, size and practical differences.
Xolo Opus HD
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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
Smart A12 Star: 6.8 mm narrower
- Smart A12 Star:
- 64.2 mm
- Opus HD:
- 71 mm
-
Screen diagonal
Smart A12 Star: 0.99 in smaller diagonal
- Smart A12 Star:
- 4 in
- Opus HD:
- 4.99 in
-
Depth
Opus HD: 2.2 mm thinner
- Smart A12 Star:
- 10.1 mm
- Opus HD:
- 7.9 mm
-
Height
Smart A12 Star: 18.8 mm shorter
- Smart A12 Star:
- 124.2 mm
- Opus HD:
- 143 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. Smart A12 Star
- Height:
- 124.2 mm
- Width:
- 64.2 mm
- Depth:
- 10.1 mm +2.2 mm versus Opus HD
- Weight:
- 130 g
2. Opus HD
- Height:
- 143 mm +18.8 mm versus Smart A12 Star
- Width:
- 71 mm +6.8 mm versus Smart A12 Star
- Depth:
- 7.9 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. Smart A12 Star
- Screen diagonal:
- 4 in
- Aspect ratio (height:width):
- 5:3
- Approximate rectangular screen area:
- 45.5 cm²
2. Opus HD
- Screen diagonal:
- 4.99 in
- Aspect ratio (height:width):
- 16:9
- Approximate rectangular screen area:
- 68.6 cm²
Opus HD has approximately 50.7% more rectangular screen area than Smart A12 Star.
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 | Smart A12 Star | Opus HD |
|---|---|---|
| 8 GB | Unknown | 1 GB RAM |
Smart A12 Star: 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. Smart A12 Star
- NFC:
- Unknown
- Headphone jack:
- Yes
- Memory card support:
- See details microSD · up to 32 GB
2. Opus HD
- 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.
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. Smart A12 Star2. Opus HD
Everyday essentials
| Specification | Smart A12 Star | Opus HD |
|---|---|---|
| Dimensions (HxWxD) |
|
|
| Weight |
|
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| Technology |
|
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| Screen size |
|
|
| 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 | Unknown |
|
| Headphone jack |
|
|
Display
| Specification | Smart A12 Star | Opus HD |
|---|---|---|
| Touchscreen |
|
|
| 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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Camera and Video
| Specification | Smart A12 Star | Opus HD |
|---|---|---|
| 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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Performance
Scores marked * are historical catalogue entries. Test conditions are unspecified; no new testing is implied.
| Specification | Smart A12 Star | Opus HD |
|---|---|---|
| Processor CPU |
|
|
| Graphics processor GPU | Unknown |
|
| Antutu 7 score * | Unknown |
|
General specs
| Specification | Smart A12 Star | Opus HD |
|---|---|---|
| Release date |
|
|
| Colors |
|
|
| Historical recorded price Legacy catalogue value; date unknown. Not a current offer. |
|
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| Battery life |
|
|
Communication and Connectivity
| Specification | Smart A12 Star | Opus HD |
|---|---|---|
| SIM card |
|
|
| 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 |
|
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Music and Audio
| Specification | Smart A12 Star | Opus HD |
|---|---|---|
| Radio |
|
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Other features
| Specification | Smart A12 Star | Opus HD |
|---|---|---|
| Dop |
|
|
