Phone Comparison - Asus Zenfone 4 vs Xiaomi Redmi 2 vs Asus Zenfone C ZC451CG
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| Manufacturer | Asus | Xiaomi | Asus |
| Announced | January 2014 | January 2015 | January 2015 |
| Status | Available - June 2014 | Available - January 2015 | Available - February 2015 |
| Price | - | Rs. 5,999 ($88.22) [Similarly Priced] | Rs. 5,999 ($88.22) [Similarly Priced] |
| Colors | Black, White, Red, Blue, Yellow | Black, White, Yellow, Pink, Green | Charcoal Black, Pearl White, Cherry Red |
| 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) |
134 x 67.2 x 9.4 mm (5.28 x 2.65 x 0.37 in) |
136.5 x 67 x 10.9 mm (5.37 x 2.64 x 0.43 in) |
| Weight | 115 g (4.06 oz) | 133 g (4.69 oz) | 149 g (5.26 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 1900 / 2100 TD-SCDMA 1900 / 2100 |
HSDPA 850 / 900 / 1900 / 2100 |
| 4G Network | - | LTE 1800 / 2600 TD-LTE 1900 / 2300 / 2500 / 2600 (Bands 3, 7, 38, 39, 40, 41) | - |
| Messaging | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, 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 (KitKat) | Android OS, v4.4.2 (KitKat) |
| Processor | Dual-core 1.2 GHz, Intel Atom Z2520 | Quad-core 1.2 GHz Cortex-A53, Qualcomm MSM8916 Snapdragon 410 | Dual-core 1.2 GHz, Intel Atom Z2520 |
| GPU | PowerVR SGX544MP2 | Adreno 306 | PowerVR SGX544MP2 |
| RAM | 1 GB | 1 GB | 1 GB |
| Internal Memory | 8 GB | 8 GB | 8 GB |
| External Memory | microSD, up to 64 GB | microSD, up to 32 GB | microSD, up to 64 GB |
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| Type | LCD Capacitive Touchscreen, Corning Gorilla Glass 3 | IPS LCD Capacitive Touchscreen | IPS LCD capacitive touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 4.0 inches | 4.7 inches | 4.5 inches |
| Resolution | 480 x 800 pixels (233 ppi) | 720 x 1280 pixels (312 ppi) | 480 x 854 pixels (218 ppi) |
| Screen-to-Body Ratio | 59.74% | 67.83% | 60.85% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM Radio | FM Radio | FM radio |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 5 MP, 2592 x 1944 pixels | 8 MP, 3264 x 2448 pixels | 5 MP, 2592 х 1944 pixels |
| Flash | No | LED flash | LED flash |
| Features | Auto focus, Geo-tagging, Panorama | Auto focus, Geo-tagging, Touch Focus, Face Detection, HDR, Sony Sensor, Panorama, Real-time HDR | Auto focus, Yes |
| Video | Yes, 1080p@30fps | Yes, 1080p | Yes |
| Front Camera | Yes, VGA [Similar] | 2 MP, 720p [Similar] | VGA [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSDPA, 42.2 Mbps; HSUPA, 5.76 Mbps | HSPA, LTE Cat4 150/50 Mbps | HSPA 42.2/5.76 Mbps |
| Bluetooth | Yes, v4.0 with A2DP, EDR | v4.0, A2DP | v4.0, A2DP, EDR |
| Wi-Fi | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, hotspot | Wi-Fi 802.11 b/g/n, hotspot |
| USB | Yes, microUSB v2.0 | microUSB v2.0 | microUSB v2.0 |
| GPS | Yes, with A-GPS support | Yes, with A-GPS, GLONASS, Beidou | Yes, with A-GPS, GLONASS |
| Browser | HTML | HTML5 | HTML |
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| Internal | 8 GB, 1 GB RAM | 8 GB, 1 GB RAM / 16 GB, 2 GB RAM | 8 GB, 1 GB RAM |
| Expandable Storage | microSD, up to 64 GB | 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 | Li-Po Battery | Li-Po Battery | Li-Ion Battery |
| Capacity | 1200/1600 mAh | 2200 mAh | 2100 mAh |
| Stand by | Up to 192 h | - | - |
| Talk Time | Up to 10 h | - | - |
