Summary | 68 Score | 72 Score | 80 Score | |
| Performance | Apple A8 1 GB RAM iOS 8, up to iOS 9.0.2 | Apple A9 2 GB RAM iOS 9, Upgradable to iOS 10 | Apple A11 Bionic 3 GB RAM iOS 11 | |
| Display | 4.7 inch 750 x 1334 pixels 326 PPI Density | 4.7 inch 750 x 1334 pixels 326 PPI Density | 5.8 inch 1125 x 2436 pixels 458 PPI Density | |
| Camera | 8 MP (Main) 1.2 MP (Front) | 12 MP (Main) 5 MP (Front) 4K Video Recording | 12 + 12 MP (Main) 7 MP (Front) 4K Video Recording Dual Camera | |
| Battery | 1810 mAh Li-Po | 1715 mAh Li-Po | 2716 mAh Li-ion | |
Display |
| Screen Size | 4.7 inch | 4.7 inch | 5.8 inch | |
| Screen Resolution | 750x1334 pixels | 750x1334 pixels | 1125 x 2436 pixels | |
| Pixel Density | 326 PPI | 326 PPI | 458 PPI | |
| Display Type | LED-backlit IPS LCD, capacitive touchscreen, 16M colors | LED-backlit IPS LCD, capacitive touchscreen, 16M colors | Super Retina HD,OLED Multi-Touch 3D Touch display | |
| Gorilla Glass | - | - | - | |
| Screen Protection | - | Ion-strengthened glass, oleophobic coating | Scratch resistant glass | |
Chipset |
| Brand | Apple Mobiles | Apple Mobiles | Apple Mobiles | |
| Chipset | Apple A8 | Apple A9 | Apple A11 Bionic | |
| Processor | Dual-core 1.4 GHz Typhoon (ARM v8-based) | Dual-core 1.84 GHz Twister | Hexa-core,Embedded M11 motion coprocessor | |
| RAM | 1 GB RAM | 2 GB RAM | 3 GB RAM | |
| GPU | PowerVR GX6450 (quad-core graphics) | PowerVR GT7600 (six-core graphics) | | |
Camera |
| Rear Camera Resolution | 8 MP | 12 MP | 12 + 12 MP | |
| Front Camera Resolution | 1.2 MP | 5 MP | 7 MP | |
| Video | | 4K Video Recording | 4K Video Recording | |
| Camera Features | Autofocus, Flash | Autofocus, Touch Focus, Flash, Panorama, Geo-Tagging | Autofocus, Touch Focus, Flash, Panorama, Geo-Tagging | |
General |
| Operating System | iOS | iOS | iOS | |
| OS Version | iOS 8, up to iOS 9.0.2 | iOS 9, Upgradable to iOS 10 | iOS 11 | |
| Weight | 129 g | 143 g | 174 g | |
| Dimensions | 138.1 x 67 x 6.9 mm | 138.3 x 67.1 x 7.1 mm | 143.6 x 70.9 x 7.7 mm | |
| Thickness | 6.9mm | 7.1mm | 7.7mm | |
Storage |
| Internal Storage | 16 GB | 32 GB | 64 GB | |
| Card Slot | No | No | No | |
| Other | 16GB storage, no card slot | 32GB storage, no card slot | 64GB Inbuilt Storage,Non expandable | |
Communication |
| SIM Card Slots | Dual SIM | Single SIM | Single SIM | |
| SIM Card Type | Nano-SIM | Nano-SIM | Nano-SIM | |
| Bluetooth | v4.0, A2DP, LE | v4.2, A2DP, LE | Bluetooth 5.0 wireless technology | |
| 3.5 mm Jack | Yes | Yes | Yes | |
| NFC | Yes (Apple Pay only) | Yes (Apple Pay only) | NFC with reader mode | |
Connectivity |
| VoLTE | | | | |
| 4G | LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 13(700), 17(700), 18(800), 19(800), 20(800), 25(1900), 26(850), 28(700), 29(700) - A1549 GSM, A1549 CDMA | LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 13(700), 17(700), 18(800), 19(800), 20(800), 25(1900), 26(850), 28(700), 29(700) - A1688 | TD-LTE 2600(band 38) / 2300(band 40) / 2500(band 41) / 1900(band 39) FD-LTE 2100(band 1) / 1800(band 3) / 2600(band 7) / 900(band 8) / 700(band 28) / 1900(band 2) / 1700(band 4) / 850(band 5) / 700(band 13) / 700(band 17) / 850(band 18) / 850(band 19) / | |
| 3G | HSDPA 850 / 900 / 1700 / 1900 / 2100 - A1549 (GSM), A1549 (CDMA), A1586 | HSDPA 850 / 900 / 1700 / 1900 / 2100 | UMTS 1700 / 1900 / 2100 / 850 / 900 MHz | |
| 2G | GSM 850 / 900 / 1800 / 1900 - A1549 (GSM), A1549 (CDMA), A1586 | GSM 850 / 900 / 1800 / 1900 | GSM 1800 / 1900 / 850 / 900 MHz | |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n/ac, dual-band, hotspot | Wi-Fi 802.11 a/b/g/n/ac, dual-band, hotspot | 802.11ac Wi?Fi with MIMO | |
| GPS | Yes, with A-GPS, GLONASS | Yes, with A-GPS, GLONASS | Assisted GPS, GLONASS, Galileo and QZSS | |
| GPRS | | | | |
| EDGE | | | | |
| Radio | | | | |
Battery |
| Battery Capacity | 1810 mAh | 1715 mAh | 2716 mAh | |
| Battery Type | Li-Po | Li-Po | Li-ion | |
| Standby Time | Up to 250 h (3G) | Up to 240 h (3G) | Up to 21 hours | |
| Talk Time | Up to 14 h (3G) | Up to 14 h (3G) | Up to 60 hours | |
Other Features |
| Fingerprint Scanner | | | | |
| Waterproof | | | | |
| Sensors | Accelerometer gyro proximity compass barometer | Accelerometer gyro proximity compass barometer | Barometer Three-axis gyro Accelerometer Proximity sensor Ambient light sensor | |
| Messaging | iMessage, SMS (threaded view), MMS, Email, Push Email | iMessage, SMS (threaded view), MMS, Email, Push Email | | |
| Java | No | No | | |
| Other | Active noise cancellation with dedicated mic , Siri natural language commands and dictation , iCloud cloud service , iCloud Keychain , TV-out , Maps , Audio/video player/editor , Organizer , Document viewer/editor , Photo viewer/editor , Voice | Active noise cancellation with dedicated mic , Siri natural language commands and dictation , iCloud cloud service , iCloud Keychain , TV-out , Maps , Organizer , Document editor , Photo/video editor | | |