Phone Comparison - Lenovo Vibe X2 vs Asus Zenfone 2 ZE551ML vs Xiaomi Mi 4i
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| Manufacturer | Lenovo | Asus | Xiaomi |
| Announced | September 2014 | January 2015 | April 2015 |
| Status | Available - October 2014 | Available - March 2015 | Available - April 2015 |
| Price | - | Rs. 14,999 ($220.57) [Similarly Priced] | Rs. 8,999 ($132.34) [Similarly Priced] |
| Colors | White, Gold, Red, Dark Grey | Osmium Black, Sheer Gold, Glacier Gray, Glamor Red, Ceramic Whit | Black, White, Blue, Yellow, Pink |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
140.2 x 68.6 x 7.3 mm (5.52 x 2.7 x 0.29 in) |
152.5 x 77.2 x 10.9 mm (6 x 3.04 x 0.43 in) |
138.1 x 69.6 x 7.8 mm (5.44 x 2.74 x 0.31 in) |
| Weight | 120 g (4.23 oz) | 170 g (6 oz) | 130 g (4.59 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 850 / 900 / 1700 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 |
| 4G Network | LTE 800 / 1800 / 2100 / 2600 | LTE 700 / 800 / 850 / 900 / 1700 / 1800 / 1900 / 2100 / 2600 (Bands 1, 2, 3, 4, 5, 7, 8, 9, 17, 18, 19, 20, 28, 29) |
LTE |
| Messaging | SMS, MMS, EMail, IM | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, EMail, IM |
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| OS | Android OS, v4.4 (KitKat) | Android OS, v5.0 (Lollipop) | Android OS, v5.0 (Lollipop) |
| Processor | Octa-core 2.0 GHz, MediatTek MT6595m True8Core | Quad-core 2.3 GHz Quad-core 1.8 GHz, Intel Atom Z3580 Intel Atom Z3560 |
Quad-core 1.7 GHz Cortex-A53 & quad-core 1.0 GHz Cortex-A53, Qualcomm MSM8939 Snapdragon 615 |
| GPU | PowerVR G600 | PowerVR G6430 | Adreno 405 |
| RAM | 2 GB | 2/4 GB | 2 GB |
| Internal Memory | 32 GB | 16/32/64 GB | 16/32 GB |
| External Memory | No | microSD, up to 64 GB | No |
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| Type | IPS LCD capacitive touchscreen | IPS Capacitive Touchscreen, Corning Gorilla Glass 3 | IPS LCD capacitive touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 5.0 inches | 5.5 inches | 5.0 inches |
| Resolution | 1080 x 1920 pixels (441 ppi) | 1080 x 1920 pixels (401 ppi) | 1080 x 1920 pixels (441 ppi) |
| Screen-to-Body Ratio | 71.52% | 70.67% | 71.57% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | - | Yes | FM radio |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 13 MP, 4160 x 3120 pixels | 13 MP, 4128 x 3096 pixels | 13 MP, 4128 x 3096 pixels |
| Flash | LED flash | dual-LED (dual tone) | LED flash |
| Features | Auto focus, Geo-tagging, Touch Focus, Face Detection, Panorama, HDR | Auto focus, Geo-tagging, Touch Focus, Face Detection, Panorama, HDR | Auto focus, Geo-tagging, Touch Focus, Face/smile Detection, Panorama, HDR |
| Video | 1080p@30fps | 1080p@30fps | 1080p@30fps |
| Front Camera | 5 MP [Similar] | 5 MP [Similar] | 5 MP [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSDPA, 42 Mbps; HSUPA; LTE, Cat4, 50 Mbps UL, 150 Mbps DL | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps | HSPA, LTE |
| Bluetooth | v4.0, A2DP | v4.0, A2DP, EDR | v4.0, A2DP |
| Wi-Fi | 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 | Wi-Fi 802.11 a/b/g/n, dual-band, hotspot |
| USB | microUSB v2.0 | microUSB v2.0, USB Host | microUSB v2.0 |
| GPS | Yes, with A-GPS, GLONASS | Yes, with A-GPS, GLONASS | Yes, with A-GPS, GLONASS |
| Browser | HTML5 | HTML5 | HTML5 |
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| Internal | 32 GB, 2 GB RAM | 16/32/64 GB, 2/4 GB RAM | 16/32 GB, 2 GB RAM |
| Expandable Storage | No | microSD, up to 64 GB | No |
| 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 | Non-removable Li-Po Battery | Non-removable Li-Po Battery | Li-Po Battery |
| Capacity | 2300 mAh | 3000 mAh | 3120 mAh |
| Stand by | Up to 228 h (2G) Up to 216 h (3G) |
- | - |
| Talk Time | Up to 17 h (2G) Up to 19 h (3G) |
- | - |
