Phone Comparison - Asus Zenfone 4 vs Asus Zenfone 2 vs Microsoft Lumia 640 LTE
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| Manufacturer | Asus | Asus | Microsoft |
| Announced | January 2014 | Expected Announcement - March 2015 | March 2015 |
| Status | Available - June 2014 | Rumored - March 2015 | Available - April 2015 |
| Price | - | Rs. 10,499 ($154.40) [Similarly Priced] | Rs. 7,999 ($117.63) [Similarly Priced] |
| Colors | Black, White, Red, Blue, Yellow | Various | Yes |
| 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) |
148.1 x 71.5 x 10.9 mm (5.83 x 2.81 x 0.43 in) |
141.3 x 72.2 x 8.8 mm (5.56 x 2.84 x 0.35 in) |
| Weight | 115 g (4.06 oz) | 155 g (5.47 oz) | 145 g (5.11 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 2100 |
| 4G Network | - | LTE 700 / 850 / 900 / 1700 / 1800 / 1900 / 2100 / 2600 (Bands 1, 2, 3, 4, 5, 7, 8, 28) |
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, v4.3 (Jelly Bean), upgradable to v4.4.2 (KitKat) | Android OS, v5.0 (Lollipop) | Microsoft Windows Phone 8.1 with Lumia Denim |
| Processor | Dual-core 1.2 GHz, Intel Atom Z2520 | Quad-core 1.6 GHz, Intel Atom Z2560 | Quad-core 1.2 GHz Cortex-A7, Qualcomm Snapdragon 400 |
| GPU | PowerVR SGX544MP2 | - | Adreno 305 |
| RAM | 1 GB | 2 GB | 1 GB |
| Internal Memory | 8 GB | 16 GB | 8 GB |
| External Memory | microSD, up to 64 GB | microSD, up to 64 GB | microSD, up to 128 GB |
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| Type | LCD Capacitive Touchscreen, Corning Gorilla Glass 3 | IPS capacitive touchscreen | IPS LCD Capacitive Touchscreen, Corning Gorilla Glass 3, ClearBlack Display |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 4.0 inches | 5.0 inches | 5.0 inches |
| Resolution | 480 x 800 pixels (233 ppi) | 720 x 1280 pixels (294 ppi) | 720 x 1280 pixels (294 ppi) |
| Screen-to-Body Ratio | 59.74% | 64.96% | 67.43% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM Radio | TBC | 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 | 8 MP, 3264 x 2448 pixels |
| Flash | No | LED flash | LED flash |
| Features | Auto focus, Geo-tagging, Panorama | Auto focus, Geo-tagging, Touch Focus, Face Detection, Panorama, HDR | Auto focus, 1/4'' Sensor Size |
| Video | Yes, 1080p@30fps | 1080p@30fps | 1080p@30fps |
| Front Camera | Yes, VGA [Similar] | 2 MP [Similar] | 1 MP, 720p [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSDPA, 42.2 Mbps; HSUPA, 5.76 Mbps | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps |
| Bluetooth | Yes, v4.0 with A2DP, EDR | v4.0, A2DP, EDR | v4.0, A2DP |
| Wi-Fi | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, Wi-Fi hotspot | Wi-Fi 802.11 a/b/g/n, Wi-Fi Direct, hotspot | Wi-Fi 802.11 b/g/n, DLNA, hotspot |
| USB | Yes, microUSB v2.0 | microUSB v2.0 | microUSB v2.0 |
| GPS | Yes, with A-GPS support | Yes, with A-GPS, GLONASS | Yes, with A-GPS, GLONASS, Beidou |
| Browser | HTML | HTML5 | HTML5 |
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| Internal | 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 64 GB | microSD, up to 128 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 | Li-Ion Battery |
| Capacity | 1200/1600 mAh | 2500 mAh | 2500 mAh |
| Stand by | Up to 192 h | - | Up to 864 h (2G) Up to 864 h (3G) |
| Talk Time | Up to 10 h | - | Up to 26 h 30 min (2G) Up to 17 h 30 min (3G) |
