| ratings |
| Overall NDTV Rating | Read Review | Read Review | Read Review | Read Review |
| Design Rating | | | | |
| Display Rating | | | | |
| Software Rating | | | | |
| Performance Rating | | | | |
| Battery Life Rating | | | | |
| Camera Rating | | | | |
| Value for Money Rating | | | | |
| key specs |
| Display | 6.00-inch | 5.80-inch | 5.80-inch | 5.50-inch |
| Processor | MediaTek Helio P22 | Samsung Exynos 9810 | Samsung Exynos 8895 | octa-core |
| Front Camera | 8-megapixel | 8-megapixel | 8-megapixel | 5-megapixel |
| Rear Camera | 13-megapixel + 5-megapixel | 12-megapixel | 12-megapixel | 12-megapixel |
| RAM | 3GB | 4GB | 4GB | 4GB |
| Storage | 32GB | 64GB | 64GB | 32GB |
| Battery Capacity | 3500mAh | 3000mAh | 3000mAh | 3600mAh |
| OS | Android 8.1 Oreo | Android 8.0 | Android 7.0 | Android 6.0 |
| Resolution | 720x1440 pixels | 1440x2960 pixels | 1440x2960 pixels | 1440x2560 pixels |
| general |
| Brand | Nokia | Samsung | Samsung | Samsung |
| Model | 3.1 Plus | Galaxy S9 | Galaxy S8 | Galaxy S7 Edge |
| Release date | October 1, 2018 | March 1, 2018 | March 1, 2017 | February 1, 2016 |
| Launched in India | Yes | Yes | Yes | Yes |
| Form factor | Touchscreen | Touchscreen | Touchscreen | Touchscreen |
| Body type | Metal | - | - | - |
| Dimensions (mm) | 156.68 x 76.44 x 8.19 | 147.70 x 68.70 x 8.50 | 148.90 x 68.10 x 8.00 | 150.90 x 72.60 x 7.70 |
| Weight (g) | 180.00 | 163.00 | 155.00 | 157.00 |
| Battery capacity (mAh) | 3500 | 3000 | 3000 | 3600 |
| Removable battery | No | No | No | No |
| Wireless charging | No | Yes | - | - |
| Colours | Blue, White, Baltic | Lilac Purple, Midnight Black, Coral Blue | Midnight Black, Orchid Gray, Arctic Silver, Coral Blue, Maple Gold | Black, White, Gold, Silver, Pink Gold, Black Pearl, Coral Blue |
| Fast charging | - | Quick Charge 2.0 | Quick Charge 2.0 | Quick Charge 2.0 |
| display |
| Screen size (inches) | 6.00 | 5.80 | 5.80 | 5.50 |
| Touchscreen | Yes | Yes | Yes | Yes |
| Resolution | 720x1440 pixels | 1440x2960 pixels | 1440x2960 pixels | 1440x2560 pixels |
| Aspect ratio | 18:9 | 18.5:9 | 18.5:9 | 16:9 |
| Protection type | - | Gorilla Glass | Gorilla Glass | Gorilla Glass |
| Pixels per inch (PPI) | - | 568 | 570 | 534 |
| hardware |
| Processor | 1.5GHz octa-core (4x2GHz + 4x1.5GHz) | octa-core (4x2.7GHz + 4x1.7GHz) | octa-core (4x2.35GHz + 4x1.9GHz) | octa-core (4x2.3GHz + 4x1.6GHz) |
| Processor make | MediaTek Helio P22 (MT6762) | Samsung Exynos 9810 | Samsung Exynos 8895 | - |
| RAM | 3GB | 4GB | 4GB | 4GB |
| Internal storage | 32GB | 64GB | 64GB | 32GB |
| Expandable storage | Yes | Yes | Yes | Yes |
| Expandable storage type | microSD | microSD | microSD | microSD |
| Dedicated microSD slot | Yes | - | - | - |
| Expandable storage up to (GB) | - | 400 | 256 | 200 |
| camera |
| Rear camera | 13-megapixel (f/2.0, 1.12-micron) + 5-megapixel (f/2.4, 1.12-micron) | 12-megapixel (1.4-micron) | 12-megapixel (f/1.7, 1.4-micron) | 12-megapixel (f/1.7, 1.4-micron) |
| Rear autofocus | Phase detection autofocus | Phase detection autofocus | Phase detection autofocus | Phase detection autofocus |
| Rear flash | LED | LED | Dual LED | Yes |
| Front camera | 8-megapixel (f/2.2, 1.12-micron) | 8-megapixel (f/1.7, 1.22-micron) | 8-megapixel (f/1.7, 1.22-micron) | 5-megapixel (f/1.7, 1.34-micron) |
| Front flash | No | No | - | - |
| Front autofocus | - | Yes | Yes | - |
| software |
| Operating system | Android 8.1 Oreo | Android 8.0 | Android 7.0 | Android 6.0 |
| Skin | - | Experience 9.0 | - | - |
| connectivity |
| Wi-Fi | Yes | Yes | Yes | Yes |
| Wi-Fi standards supported | 802.11 b/g/n | 802.11 a/b/g/n/ac | 802.11 a/b/g/n/ac | 802.11 a/b/g/n/ac |
| GPS | Yes | Yes | Yes | Yes |
| Bluetooth | Yes, v 4.20 | Yes, v 5.00 | Yes | Yes, v 4.20 |
| NFC | No | Yes | Yes | Yes |
| Infrared | No | - | No | No |
| USB OTG | Yes | Yes | No | Yes |
| USB Type-C | No | Yes | Yes | - |
| Micro-USB | Yes | - | - | Yes |
| Headphones | 3.5mm | 3.5mm | 3.5mm | 3.5mm |
| FM | Yes | No | No | No |
| Number of SIMs | 2 | 2 | 1 | 2 |
| Active 4G on both SIM cards | Yes | - | - | - |
| Wi-Fi Direct | - | Yes | No | No |
| Mobile High-Definition Link (MHL) | - | - | No | No |
| sim 1 |
| SIM Type | Nano-SIM | Nano-SIM | - | - |
| GSM/CDMA | GSM | GSM | GSM | GSM |
| 3G | Yes | Yes | Yes | Yes |
| 4G/ LTE | Yes | Yes | Yes | Yes |
| sim 2 |
| SIM Type | Nano-SIM | Nano-SIM | - | - |
| GSM/CDMA | GSM | GSM | - | GSM |
| 3G | Yes | Yes | - | Yes |
| 4G/ LTE | Yes | Yes | - | Yes |
| sensors |
| Face unlock | Yes | Yes | - | - |
| Fingerprint sensor | Yes | Yes | Yes | Yes |
| Compass/ Magnetometer | Yes | Yes | Yes | Yes |
| Proximity sensor | Yes | Yes | Yes | Yes |
| Accelerometer | Yes | Yes | Yes | Yes |
| Ambient light sensor | Yes | Yes | Yes | Yes |
| Gyroscope | Yes | Yes | Yes | Yes |
| Barometer | No | Yes | Yes | Yes |
| Temperature sensor | No | - | No | No |