Phone Comparison - Asus Zenfone 4 vs Micromax Unite 2 A106 vs Karbonn Titanium S20
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| Manufacturer | Asus | Micromax | Karbonn |
| Announced | January 2014 | May 2014 | September 2014 |
| Status | Available - June 2014 | Available - May 2014 | Available - September 2014 |
| Price | - | - | Rs. 5,390 ($79.26) [Similarly Priced] |
| Colors | Black, White, Red, Blue, Yellow | Pristine White, Balmy Green, Mystic Grey, Raging Red | White, Black |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
124.4 x 61.4 x 6.3-11.2 (4.9 x 2.42 x 0.25-0.44) |
138.9 x 71.9 x 9.4 mm (5.47 x 2.83 x 0.37 in) |
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| Weight | 115 g (4.06 oz) | 158.5 g (5.57.0.18 oz) | - |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 2100 | HSDPA 2100 |
| Messaging | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, Push Mail, EMail, IM |
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| OS | Android OS, v4.3 (Jelly Bean), upgradable to v4.4.2 (KitKat) | Android OS, v4.4.2 (KitKat) | Android OS, v4.4 (KitKat) |
| Processor | Dual-core 1.2 GHz, Intel Atom Z2520 | Quad-core 1.3 GHz, Mediatek MT6582M | Quad-core 1.3 GHz, Mediatek MT6582M |
| GPU | PowerVR SGX544MP2 | Mali-400MP2 | Mali-400MP2 |
| RAM | 1 GB | 1 GB | 1 GB |
| Internal Memory | 8 GB | 4/8 GB (0.89 GB for apps, 1.67 GB for mass storage) | 4 GB ROM |
| External Memory | microSD, up to 64 GB | microSD, up to 32 GB | microSD, up to 32 GB |
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| Type | LCD Capacitive Touchscreen, Corning Gorilla Glass 3 | IPS LCD Capacitive Touchscreen | TFT Capacitive Touchscreen |
| Colors | 16M colors | 16.7M colors | 16M colors |
| Size | 4.0 inches | 4.7 inches | 4.5 inches |
| Resolution | 480 x 800 pixels (233 ppi) | 480 x 800 pixels (199 ppi) | 480 x 854 pixels (218 ppi) |
| Screen-to-Body Ratio | 59.74% | 62.64% | - |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM Radio | FM Radio with Recording | FM Radio with Recording |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 5 MP, 2592 x 1944 pixels | 5 MP, 2592x1944 pixels | 5 MP, 2592x1944 pixels |
| Flash | No | LED flash | LED flash |
| Features | Auto focus, Geo-tagging, Panorama | Auto focus, Geo-tagging, Touch Focus, Face Detection, HDR | Auto focus, Geo-tagging, Touch Focus, Face Detection, HDR, Lens Blur, Panorama Shot, Photo Sphere |
| Video | Yes, 1080p@30fps | Yes, 1080p | Yes, 1080p |
| Front Camera | Yes, VGA [Similar] | Yes, 2 MP, 720p [Similar] | Yes, VGA [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSDPA, 42.2 Mbps; HSUPA, 5.76 Mbps | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps |
| Bluetooth | Yes, v4.0 with A2DP, EDR | Yes, v4.0 with A2DP | Yes, v4.0 with A2DP |
| Wi-Fi | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, Wi-Fi hotspot |
| USB | Yes, microUSB v2.0 | Yes, microUSB v2.0, USB On-the-go | Yes, microUSB v2.0, USB On-the-go |
| GPS | Yes, with A-GPS support | Yes, with A-GPS support | Yes, with A-GPS support |
| Browser | HTML | HTML5 | HTML5 |
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| Internal | 8 GB, 1 GB RAM | 4/8 GB (0.89 GB for apps, 1.67 GB for mass storage), 1 GB RAM | 4 GB ROM, 1 GB RAM |
| Expandable Storage | microSD, up to 64 GB | microSD, up to 32 GB | microSD, up to 32 GB |
| USB OTG | - | Supported | Supported |
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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 | Li-Po Battery | Li-Ion Battery | Li-Ion Battery |
| Capacity | 1200/1600 mAh | 2000 mAh | 1600 mAh |
| Stand by | Up to 192 h | Up to 190 h | - |
| Talk Time | Up to 10 h | Up to 8 h | - |
