Phone Comparison - Acer Liquid S1 vs Lenovo S820 vs Asus PadFone X
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| Manufacturer | Acer | Lenovo | Asus |
| Announced | June 2013 | May 2013 | March 2014 |
| Status | Coming Soon - Q3 2013 | Available - May 2013 | Coming Soon - Q2 2014 |
| Colors | Black | Flamingo red | Titanium Black, Platinum White |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension | - |
139.5 x 69.7 x 9 mm (5.49 x 2.74 x 0.35 in) |
143.4 x 72.5 x 10 mm (5.65 x 2.85 x 0.39 in) |
| Weight | 195 g (6.88 oz) | 143 g (5.04 oz) | 150 g (5.29 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 900 / 2100 | HSDPA |
| 4G Network | - | - | LTE |
| Messaging | SMS, MMS, EMail, IM | SMS, MMS, EMail, IM | SMS, MMS, Push Mail, EMail, IM |
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| OS | Android OS, v4.2 (Jelly Bean) | Android OS, v4.2 (Jelly Bean) | Android OS, v4.4.2 (KitKat) |
| Processor | Quad-core 1.5 GHz Cortex A-7, MTK 6589 | Quad-core 1.2 GHz, MTK 6589W | Quad-core 2.3 GHz Krait 400, Qualcomm Snapdragon 800 |
| GPU | PowerVR SGX 544MP | PowerVR SGX544 | Adreno 330 |
| RAM | 1 GB | 1 GB | 2 GB |
| Internal Memory | 8 GB storage | 4 GB | 16 GB |
| External Memory | microSD, up to 32 GB | microSD, up to 32 GB | microSD, up to 64 GB |
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| Type | TFT capacitive touchscreen | IPS LCD capacitive touchscreen | Super IPS+ LCD capacitive touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 5.7 inches | 4.7 inches | 5.0 inches |
| Resolution | 720 x 1280 pixels (258 ppi) | 720 x 1280 pixels (312 ppi) | 1080 x 1920 pixels (441 ppi) |
| Screen-to-Body Ratio | - | 62.82% | 66.16% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | - | FM radio; built-in antenna | FM radio |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 8 MP, 3264 x 2448 pixels | 12 MP, 4000 x 3000 pixels | 13 MP, 4128 x 3096 pixels |
| Flash | LED flash | LED flash | LED flash |
| Features | Auto-focus, Geo tagging | Auto focus, Geo-tagging, Touch Focus, Face Detection | Auto focus, Geo-tagging, Touch Focus, Face Detection |
| Video | Yes | Yes | Yes, 1080p@30fps |
| Front Camera | Yes [Similar] | Yes, 2 MP [Similar] | Yes, 2 MP, 1080p@30fps [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps | HSDPA, HSUPA | DC-HSPA+, 42 Mbps; HSDPA, 21 Mbps; HSUPA, 5.76 Mbps; LTE, Cat4, 50 Mbps UL, 150 Mbps DL |
| Bluetooth | Yes, v4.0 with A2DP | Yes, v3.0 with A2DP | Yes, v4.0 with A2DP |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n, Wi-Fi hotspot | Wi-Fi 802.11 a/b/g/n, dual band | Wi-Fi 802.11 a/b/g/n/ac, Wi-Fi Direct, dual-band, Wi-Fi hotspot |
| USB | Yes, microUSB v2.0 | Yes, microUSB v2.0 | Yes, microUSB v2.0 (SlimPort), USB Host |
| GPS | Yes, with A-GPS support | Yes, with A-GPS support | Yes, with A-GPS support |
| Browser | HTML5 | HTML | HTML5 |
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| Internal | 8 GB storage, 1 GB RAM | 4 GB, 1 GB RAM | 16 GB, 2 GB RAM |
| Expandable Storage | microSD, up to 32 GB | microSD, up to 32 GB | microSD, up to 64 GB |
| USB OTG | - | - | Supported |
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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-Ion Battery | Li-Po Battery | Non-removable Li-Po Battery |
| Capacity | 2400 mAh | 2000 mAh | 2300 mAh |
| Stand by | - | Up to 140 h (2G) Up to 140 h (3G) |
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| Talk Time | - | Up to 22 h (2G) Up to 10 h (3G) |
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