Phone Comparison - Asus Padfone 2 A68 vs Asus Zenfone 4 vs Asus PadFone E
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| Manufacturer | Asus | Asus | Asus |
| Announced | October 2012 | January 2014 | January 2014 |
| Status | Available - December 2012 | Available - June 2014 | Available - March 2014 |
| Colors | Black | Black, White, Red, Blue, Yellow | Johnnie Walker Black, Pearl White |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
137.9 x 68.9 x 9 mm (5.43 x 2.71 x 0.35 in) |
124.4 x 61.4 x 6.3-11.2 (4.9 x 2.42 x 0.25-0.44) |
136.9 x 69.7 x 9.08 mm (5.39 x 2.74 x 0.36 in) |
| Weight | 135 g (4.76 oz) | 115 g (4.06 oz) | 126 g (4.44 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 |
| 3G Network | HSDPA 850 / 900 / 1700 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 | HSDPA |
| 4G Network | LTE | - | - |
| 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.x (Ice Cream Sandwich) | Android OS, v4.3 (Jelly Bean), upgradable to v4.4.2 (KitKat) | Android OS, v4.3 (Jelly Bean) |
| Processor | Quad-core 1.5 GHz Krait, Qualcomm APQ8064 Snapdragon | Dual-core 1.2 GHz, Intel Atom Z2520 | Quad-core 1.4 GHz, Qualcomm Snapdragon MSM8226 |
| GPU | Adreno 320 | PowerVR SGX544MP2 | Adreno 305 |
| RAM | 2 GB | 1 GB | 1 GB |
| Internal Memory | N/A | 8 GB | 16 GB |
| External Memory | microSD, up to 32 GB | microSD, up to 64 GB | microSD, up to 64 GB |
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| Type | Super IPS+ LCD capacitive touchscreen | LCD Capacitive Touchscreen, Corning Gorilla Glass 3 | Super IPS LCD capacitive touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 4.7 inches | 4.0 inches | 4.7 inches |
| Resolution | 720 x 1280 pixels (312 ppi) | 480 x 800 pixels (233 ppi) | 720 x 1280 pixels (312 ppi) |
| Screen-to-Body Ratio | 64.29% | 59.74% | 64.01% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | No | FM Radio | - |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 13 MP, 4032 x 3224 pixels | 5 MP, 2592 x 1944 pixels | 13 MP, 4163 x 3122 pixels |
| Flash | LED flash | No | LED flash |
| Features | Auto focus, Geo-tagging, Touch Focus, Face Detection | Auto focus, Geo-tagging, Panorama | Auto focus, Geo-tagging, Touch Focus, Face Detection |
| Video | Yes, 1080p@30fps | Yes, 1080p@30fps | Yes |
| Front Camera | Yes, 1.2 MP [Similar] | Yes, VGA [Similar] | Yes, 1.2 MP [Similar] |
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| GPRS | Class 10 (4+1/3+2 slots), 32 - 48 kbps | Yes | Yes |
| Edge | Class 10, 236.8 kbps | Yes | Yes |
| 3G | DC-HSPA+; LTE | HSDPA, 42.2 Mbps; HSUPA, 5.76 Mbps | HSDPA, HSUPA |
| Bluetooth | Yes, v4.0 with A2DP | Yes, v4.0 with A2DP, EDR | Yes, v4.0 with A2DP |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n, dual-band, 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 (MHL) 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 and GLONASS |
| Browser | HTML5 | HTML | HTML5 |
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| Internal | 2 GB RAM | 8 GB, 1 GB RAM | 16 GB, 1 GB RAM |
| Expandable Storage | microSD, up to 32 GB | microSD, up to 64 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 | Standard battery, Li-Ion | Li-Po Battery | Non-removable Li-Po Battery |
| Capacity | 2140 mAh | 1200/1600 mAh | 1820 mAh |
| Stand by | Up to 336 h | Up to 192 h | Up to 270 h on (2G) Up to 330 h (3G) |
| Talk Time | Up to 16 h | Up to 10 h | Up to 27 h (2G) Up to 15 h (3G) |
