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| Display | |||
| 6.50-inch | 4.00-inch | ||
| Processor | |||
| Unisoc T616 | 1.4GHz quad-core | ||
| Front Camera | |||
| 8-megapixel | 2-megapixel | ||
| Rear Camera | |||
| 50-megapixel | 2-megapixel | ||
| RAM | |||
| 8GB | 1GB | ||
| Storage | |||
| 128GB | 8GB | ||
| Battery Capacity | |||
| 5000mAh | 2250mAh | ||
| OS | |||
| Android 13 | Android 8.1 Oreo (Go edition) | ||
| Resolution | |||
| 720x1600 pixels | 400x800 pixels | ||
| Brand | |||
| Lava | Lava | ||
| Model | |||
| O2 | Z40 | ||
| Release date | |||
| March 22, 2024 | March 1, 2019 | ||
| Launched in India | |||
| Yes | Yes | ||
| Form factor | |||
| Touchscreen | Touchscreen | ||
| Dimensions (mm) | |||
| 165.00 x 76.10 x 8.70 | 125.50 x 63.90 x 11.65 | ||
| Weight (g) | |||
| 200.00 | 120.00 | ||
| Battery capacity (mAh) | |||
| 5000 | 2250 | ||
| Colours | |||
| Imperial Green, Majestic Purple, and Royal Gold | Black, Gold | ||
| Refresh Rate | |||
| 90 Hz | - | ||
| Resolution Standard | |||
| HD+ | - | ||
| Screen size (inches) | |||
| 6.50 | 4.00 | ||
| Touchscreen | |||
| Yes | Yes | ||
| Resolution | |||
| 720x1600 pixels | 400x800 pixels | ||
| Pixels per inch (PPI) | |||
| 269 | 223 | ||
| Protection type | |||
| - | Gorilla Glass | ||
| Aspect ratio | |||
| - | 16:9 | ||
| Processor | |||
| octa-core | 1.4GHz quad-core | ||
| Processor make | |||
| Unisoc T616 | - | ||
| RAM | |||
| 8GB | 1GB | ||
| Internal storage | |||
| 128GB | 8GB | ||
| Expandable storage | |||
| Yes | Yes | ||
| Expandable storage type | |||
| microSD | microSD | ||
| Expandable storage up to (GB) | |||
| 512 | 64 | ||
| Dedicated microSD slot | |||
| Yes | - | ||
| Rear camera | |||
| 50-megapixel | 2-megapixel | ||
| No. of Rear Cameras | |||
| 2 | - | ||
| Rear flash | |||
| Yes | Yes | ||
| Front camera | |||
| 8-megapixel | 2-megapixel | ||
| No. of Front Cameras | |||
| 1 | - | ||
| Front flash | |||
| - | Yes | ||
| Operating system | |||
| Android 13 | Android 8.1 Oreo (Go edition) | ||
| Wi-Fi | |||
| Yes | Yes | ||
| Wi-Fi standards supported | |||
| 802.11 b/g/n/ac | 802.11 b/g/n | ||
| Bluetooth | |||
| Yes, v 5.00 | Yes, v 4.20 | ||
| USB Type-C | |||
| Yes | - | ||
| Headphones | |||
| 3.5mm | 3.5mm | ||
| Active 4G on both SIM cards | |||
| Yes | - | ||
| GPS | |||
| - | Yes | ||
| Micro-USB | |||
| - | Yes | ||
| Number of SIMs | |||
| - | 2 | ||
| Face unlock | |||
| Yes | - | ||
| Fingerprint sensor | |||
| Yes | - | ||
| Proximity sensor | |||
| Yes | - | ||
| Accelerometer | |||
| Yes | Yes | ||
| Ambient light sensor | |||
| Yes | - | ||
| SIM Type | |||
| - | Nano-SIM | ||
| GSM/CDMA | |||
| - | GSM | ||
| 3G | |||
| - | Yes | ||
| 4G/ LTE | |||
| - | Yes | ||
| SIM Type | |||
| - | Nano-SIM | ||
| GSM/CDMA | |||
| - | GSM | ||
| 3G | |||
| - | Yes | ||
| 4G/ LTE | |||
| - | Yes | ||
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