Phone Comparison - Asus Zenfone 4 vs Asus Zenfone 5 vs Panasonic P81
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| Manufacturer | Asus | Asus | Panasonic |
| Announced | January 2014 | January 2014 | June 2014 |
| Status | Available - June 2014 | Available - June 2014 | Available - June 2014 |
| Colors | Black, White, Red, Blue, Yellow | Black, White, Red, Blue, Gold | 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) |
148.2 x 72.8 x 5.5-10.3 (5.83 x 2.87 x 0.22-0.41) |
7.9 mm thickness (0.31 in thickness) |
| Weight | 115 g (4.06 oz) | 140 g (4.94 oz) | - |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 | GSM 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 900 / 2100 |
| Messaging | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, EMail, IM |
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| OS | Android OS, v4.3 (Jelly Bean), upgradable to v4.4.2 (KitKat) | Android OS, v4.3 (Jelly Bean), upgradable to v4.4.2 (KitKat) | Android OS, v4.2.2 (Jelly Bean) |
| Processor | Dual-core 1.2 GHz, Intel Atom Z2520 | Dual-core 2.0 GHz / Dual-core 1.6 GHz, Intel Atom Z2580/Z2560 | Octa-core 1.7 GHz Cortex-A7, Mediatek MT6592 |
| GPU | PowerVR SGX544MP2 | PowerVR SGX544MP2 | Mali-450MP4 |
| RAM | 1 GB | 1/2 GB | 1 GB |
| Internal Memory | 8 GB | 8/16 GB | 8 GB |
| External Memory | microSD, up to 64 GB | microSD, up to 64 GB | microSD, up to 32 GB |
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| Type | LCD Capacitive Touchscreen, Corning Gorilla Glass 3 | IPS LCD Capacitive Touchscreen, Corning Gorilla Glass 3 | IPS LCD capacitive touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 4.0 inches | 5.0 inches | 5.5 inches |
| Resolution | 480 x 800 pixels (233 ppi) | 720 x 1280 pixels (294 ppi) | 720 x 1280 pixels (267 ppi) |
| Screen-to-Body Ratio | 59.74% | 63.76% | - |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM Radio | FM Radio | FM radio with RDS |
| 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 | 13 MP, 4160 x 3120 pixels |
| Flash | No | LED flash | LED flash |
| Features | Auto focus, Geo-tagging, Panorama | Auto focus, Geo-tagging, Touch Focus, Face Detection | Auto focus, Geo-tagging |
| Video | Yes, 1080p@30fps | Yes | Yes, 1080p@30fps |
| Front Camera | Yes, VGA [Similar] | Yes, 2 MP [Similar] | Yes, 2 MP [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSDPA, 42.2 Mbps; HSUPA, 5.76 Mbps | HSDPA, 42.2 Mbps; HSUPA, 5.76 Mbps | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps |
| Bluetooth | Yes, v4.0 with A2DP, EDR | Yes, v4.0 with A2DP, EDR | Yes, v3.0 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 Direct, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, Wi-Fi hotspot |
| USB | Yes, microUSB v2.0 | Yes, microUSB v2.0 | Yes, microUSB v2.0 |
| GPS | Yes, with A-GPS support | Yes, with A-GPS support | Yes, with A-GPS support |
| Browser | HTML | HTML | HTML5 |
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| Internal | 8 GB, 1 GB RAM | 8/16 GB, 1/2 GB RAM | 8 GB, 1 GB RAM |
| Expandable Storage | microSD, up to 64 GB | microSD, up to 64 GB | microSD, up to 32 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 | Non-removable Li-Po Battery | Non-removable Li-Ion Battery |
| Capacity | 1200/1600 mAh | 2110 mAh | 2500 mAh |
| Stand by | Up to 192 h | Up to 353 h (3G) | - |
| Talk Time | Up to 10 h | Up to 18 h 30 min (3G) | - |
