Phone Comparison - Lenovo Vibe Z K910 vs Lenovo Vibe X2 vs Asus Zenfone Zoom ZX551ML
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| Manufacturer | Lenovo | Lenovo | Asus |
| Announced | November 2013 | September 2014 | September 2015 |
| Status | Available - January 2014 | Available - October 2014 | Available - January 2016 |
| Price | - | - | Rs. 37,999 ($558.81) [Similarly Priced] |
| Colors | Black | White, Gold, Red, Dark Grey | Pure Black, Ceramic White |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
7.9 mm thickness (0.31 in thickness) |
140.2 x 68.6 x 7.3 mm (5.52 x 2.7 x 0.29 in) |
158.9 x 78.8 x 12 mm (6.26 x 3.1 x 0.47 in) |
| Weight | 147 g (5.19 oz) | 120 g (4.23 oz) | 185 g (6.53 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 |
| 3G Network | HSDPA 2100 | HSDPA 850 / 900 / 1700 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 |
| 4G Network | LTE | LTE 800 / 1800 / 2100 / 2600 | LTE band 1(2100), 2(1900), 3(1800), 5(850), 7(2600), 8(900), 9(1800), 18(800), 19(800), 28(700) |
| Messaging | SMS, MMS, EMail, IM | SMS, MMS, EMail, IM | SMS, MMS, Push Mail, EMail, IM |
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| OS | Android OS, v4.3 (Jelly Bean) | Android OS, v4.4 (KitKat) | Android OS, v5.0 (Lollipop) |
| Processor | Quad-core 2.2 GHz Krait 400, Qualcomm Snapdragon 800 | Octa-core 2.0 GHz, MediatTek MT6595m True8Core | Quad-core 2.5 GHz, Intel Atom Z3590 |
| GPU | Adreno 330 | PowerVR G600 | PowerVR G6430 |
| RAM | 2 GB | 2 GB | 4 GB |
| Internal Memory | 16 GB ROM | 32 GB | 128 GB |
| External Memory | microSD, up to 32 GB | No | microSD, up to 128 GB |
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| Type | IPS LCD Capacitive Touchscreen | IPS LCD capacitive touchscreen | IPS Capacitive Touchscreen, Corning Gorilla Glass 4 |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 5.5 inches | 5.0 inches | 5.5 inches |
| Resolution | 1080 x 1920 pixels (401 ppi) | 1080 x 1920 pixels (441 ppi) | 1080 x 1920 pixels (401 ppi) |
| Screen-to-Body Ratio | - | 71.52% | 66.44% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | - | - | No |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 13 MP, 4128 x 3096 pixels | 13 MP, 4160 x 3120 pixels | 13 MP, 4128 x 3096 pixels |
| Flash | Dual-LED flash | LED flash | Dual-LED (Dual Tone) |
| Features | Auto focus, Geo-tagging, Touch Focus, Face Detection | Auto focus, Geo-tagging, Touch Focus, Face Detection, Panorama, HDR | Laser Autofocus, Optical Image Stabilization, Geo-tagging, Touch Focus, Face Detection, Panorama, HDR |
| Video | Yes, 1080p@30fps | 1080p@30fps | 1080p@30fps |
| Front Camera | Yes, 5 MP [Similar] | 5 MP [Similar] | 5 MP [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | DC-HSDPA, 42 Mbps; HSDPA, 21 Mbps; HSUPA, 5.76 Mbps; LTE, Cat3, 50 Mbps UL, 150 Mbps DL | HSDPA, 42 Mbps; HSUPA; LTE, Cat4, 50 Mbps UL, 150 Mbps DL | HSPA 42.2/5.76 Mbps, LTE Cat4+ 250/50 Mbps |
| Bluetooth | Yes, v4.0 with A2DP | v4.0, A2DP | v4.0, A2DP, EDR |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n, dual band, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n/ac, dual band, Wi-Fi hotspot | Wi-Fi 802.11 a/b/g/n/ac, Wi-Fi Direct, 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 | HTML5 | HTML5 | HTML5 |
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| Internal | 16 GB ROM, 2 GB RAM | 32 GB, 2 GB RAM | 128 GB, 4 GB RAM |
| Expandable Storage | microSD, up to 32 GB | No | 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 | Non-removable Li-Po Battery |
| Capacity | - | 2300 mAh | 3000 mAh |
| Stand by | - | Up to 228 h (2G) Up to 216 h (3G) |
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| Talk Time | - | Up to 17 h (2G) Up to 19 h (3G) |
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