Phone Comparison - Asus Zenfone 6 vs Samsung Galaxy Ace 4 vs HTC Desire 620 Dual SIM
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| Manufacturer | Asus | Samsung | HTC |
| Announced | January 2014 | June 2014 | December 2014 |
| Status | Available - June 2014 | Available - July 2014 | Available - December 2014 |
| Colors | Black, White, Red, Gold | Iris Charcoal, Classic White | Blue, Black, Gray, White |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
166.9 x 84.3 x 5.5-9.9 mm (6.57 x 3.32 x 0.22-0.39 in) |
121.4 x 62.9 x 10.8 mm (4.78 x 2.48 x 0.43 in) |
150.1 x 72.7 x 9.6 mm (5.91 x 2.86 x 0.38 in) |
| Weight | 196 g (6.91 oz) | 123.8 g (4.34.0.28 oz) | 160 g (5.64 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 900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 |
| 4G Network | - | - | LTE 900 / 1800 / 2100 / 2600 TD-LTE 1900 / 2300 / 2600 |
| Messaging | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, Push Mail, EMail |
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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, v4.4.4 (KitKat) |
| Processor | Dual-core 2 GHz, Intel Atom Z2580 | Dual-core 1.0 GHz | Quad-core 1.2 GHz Cortex-A53, Qualcomm MSM8916 Snapdragon 410 |
| GPU | PowerVR SGX544MP2 | - | Adreno 306 |
| RAM | 1/2 GB | 512 MB | 1 GB |
| Internal Memory | 8/16/32 GB | 4 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 | IPS LCD Capacitive Touchscreen, Corning Gorilla Glass 3 | TFT capacitive touchscreen | Capacitive touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 6.0 inches | 4.0 inches | 5.0 inches |
| Resolution | 720 x 1280 pixels (245 ppi) | 480 x 800 pixels (233 ppi) | 720 x 1280 pixels (294 ppi) |
| Screen-to-Body Ratio | 70.40% | 59.76% | 63.04% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | No | FM radio | FM radio |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 13 MP, 4128 x 3096 pixels | 5 MP, 2592 х 1944 pixels | 8 MP, 3264 x 2448 pixels |
| Flash | LED flash | LED flash | LED flash |
| Features | Auto focus, Geo-tagging, Touch Focus, Face Detection | Auto focus, Geo-tagging, Face And Smile Detection, Panorama | Auto focus, Geo-tagging, Touch Focus, Face Detection, Panorama |
| Video | Yes | Yes, 720p@30fps | 1080p@30fps |
| Front Camera | Yes, 2 MP [Similar] | Yes, VGA [Similar] | 5 MP [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 | HSPA, LTE |
| Bluetooth | Yes, v4.0 with A2DP, EDR | Yes, v4.0 with A2DP | v4.0, A2DP, apt-X |
| 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, hotspot |
| USB | Yes, microUSB v2.0 | Yes, microUSB v2.0 | microUSB v2.0 |
| GPS | Yes, with A-GPS support | Yes, with A-GPS support and GLONASS | Yes, with A-GPS, GLONASS |
| Browser | HTML | HTML5 | HTML5 |
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| Internal | 8/16/32 GB, 1/2 GB RAM | 4 GB, 512 MB 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 | Non-removable Li-Po Battery | Li-Ion Battery | Li-Po Battery |
| Capacity | 3300 mAh | 1500 mAh | 2100 mAh |
| Stand by | Up to 398 h (3G) | - | - |
| Talk Time | Up to 28 h (3G) | - | - |
