Phone Comparison - Apple iPhone vs Karbonn KT21 Express vs Samsung Galaxy Grand Neo
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| Manufacturer | Apple | Karbonn | Samsung |
| Announced | January 2007 | 2012 | January 2014 |
| Status | Discontinued | Available | Available - February 2014 |
| Colors | Black | Black | Black, White |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
115 x 61 x 11.6 mm (4.53 x 2.4 x 0.46 in) |
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143.7 x 77.1 x 9.6 mm (5.66 x 3.04 x 0.38 in) |
| Weight | 135 g (4.76 oz) | - | 163 g (5.75 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | N/A | HSDPA 850 / 1900 / 2100 - SIM 1 only HSDPA 900 / 1900 / 2100 - SIM 1 only |
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| Messaging | SMS | SMS, MMS | SMS, MMS, EMail, IM |
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| OS | iPhone OS, upgradable to iOS 3.1.3 | - | Android OS, v4.2 (Jelly Bean) |
| Processor | 412 MHz ARM 11 | - | Quad-core 1.2 GHz Cortex-A7, Broadcom BCM23550 |
| GPU | PowerVR MBX | - | Broadcom VideoCore IV |
| RAM | N/A | N/A | 1 GB |
| Internal Memory | 4/8/16 GB | - | 16 GB ROM |
| External Memory | No | microSD, up to 32 GB | microSD, up to 64 GB |
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| Type | TFT capacitive touchscreen | TFT capacitive touchscreen | TFT Capacitive Touchscreen |
| Colors | 16M colors | TFT capacitive touchscreen | 16M colors |
| Size | 3.5 inches | 2.8 inches | 5.0 inches |
| Resolution | 320 x 480 pixels (165 ppi) | 240 x 320 pixels (143 ppi) | 480 x 800 pixels (187 ppi) |
| Screen-to-Body Ratio | 51.89% | - | 63.94% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | No | FM radio, FM recording | Stereo FM radio with RDS |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 2 MP, 1600x1200 pixels | 3.15 MP, 2048x1536 pixels | 5 MP, 2592х1944 pixels |
| Flash | No | LED flash | LED flash |
| Features | - | - | Auto focus, Geo-tagging, Touch Focus, Face And Smile Detection, Image Stabilization |
| Video | No | Yes | Yes, 720p@30fps |
| Front Camera | No [Similar] | No [Similar] | Yes, VGA [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | - | N/A | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps |
| Bluetooth | Yes, v2.0, headset support only | Yes | Yes, v4.0 with A2DP, LE, EDR |
| Wi-Fi | Wi-Fi 802.11b/g | No | Wi-Fi 802.11 a/b/g/n, Wi-Fi hotspot |
| USB | Yes, v2.0 | Yes | Yes, microUSB v2.0 |
| GPS | No | No | Yes, with A-GPS, support and GLONASS |
| Browser | HTML (Safari) | Yes | HTML5 |
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| Phonebook | Practically unlimited entries and fields, Photocall | 2000 entries | Practically unlimited entries and fields, Photocall |
| Call Records | Practically unlimited | Yes | Practically unlimited |
| Internal | 4/8/16 GB | - | 16 GB ROM, 1 GB RAM |
| Expandable Storage | No | microSD, up to 32 GB | microSD, up to 64 GB |
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| Fingerprint | |
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| Proximity Sensor | |
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| Accelerometer Sensor | |
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| NFC | |
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| Type | Non-removable, Li-Ion battery | Li-Ion Battery | Standard battery, Li-Ion |
| Capacity | - | 1000 mAh | 2100 mAh |
| Stand by | Up to 250 h | - | Up to 430 h |
| Talk Time | Up to 8 h | - | Up to 11 h |
