Phone Comparison - ZTE Zmax vs Microsoft Lumia 640 LTE vs Samsung Galaxy A8
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| Manufacturer | ZTE | Microsoft | Samsung |
| Announced | September 2014 | March 2015 | July 2015 |
| Status | Available - September 2014 | Available - April 2015 | Available - August 2015 |
| Price | Rs. 11,920 ($175.00) [Similarly Priced] | Rs. 7,999 ($117.63) [Similarly Priced] | Rs. 26,990 ($396.91) [Similarly Priced] |
| Colors | Black | Yes | Pearl White, Midnight Black, Champagne Gold |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
162.6 x 83.8 x 8.9 mm (6.4 x 3.3 x 0.35 in) |
141.3 x 72.2 x 8.8 mm (5.56 x 2.84 x 0.35 in) |
158 x 76.8 x 5.9 mm (6.22 x 3.02 x 0.23 in) |
| Weight | 189.9 g (6.67.0.32 oz) | 145 g (5.11 oz) | 151 g (5.33 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (optional) |
| 3G Network | HSDPA 850 / 1700 / 1900 / 2100 | HSDPA 850 / 900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 |
| 4G Network | LTE 700 / 1700 / 1900 / 2100 / 2600 (Bands 2, 4, 7, 12) |
LTE | LTE |
| Messaging | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, EMail, IM |
| Build Features | - | - | - Fingerprint sensor |
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| OS | Android OS, v4.4.2 (KitKat) | Microsoft Windows Phone 8.1 with Lumia Denim | Android OS, v5.1 (Lollipop) |
| Processor | Quad-core 1.2 GHz Cortex-A7, Qualcomm MSM8926 Snapdragon 400 | Quad-core 1.2 GHz Cortex-A7, Qualcomm Snapdragon 400 | Quad-core 1.5 GHz Cortex-A53 & quad-core 1.0 GHz Cortex-A53, Qualcomm MSM8939 Snapdragon 615 |
| GPU | Adreno 305 | Adreno 305 | Adreno 405 |
| RAM | 2 GB | 1 GB | 2 GB |
| Internal Memory | 16 GB | 8 GB | 16/32 GB |
| External Memory | microSD, up to 32 GB | microSD, up to 128 GB | microSD, up to 128 GB (uses SIM 2 slot) |
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| Type | TFT Capacitive Touchscreen, Corning Gorilla Glass 3 | IPS LCD Capacitive Touchscreen, Corning Gorilla Glass 3, ClearBlack Display | Super AMOLED capacitive touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 5.7 inches | 5.0 inches | 5.7 inches |
| Resolution | 720 x 1280 pixels (258 ppi) | 720 x 1280 pixels (294 ppi) | 1080 x 1920 pixels (386 ppi) |
| Screen-to-Body Ratio | 65.56% | 67.43% | 73.99% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | - | FM radio | FM radio with RDS; recording |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 8 MP, 3264 x 2448 pixels | 8 MP, 3264 x 2448 pixels | 16 MP, 5312 x 2988 pixels |
| Flash | LED flash | LED flash | LED flash |
| Features | Auto focus, Geo-tagging, Touch Focus, Face Detection | Auto focus, 1/4'' Sensor Size | Auto focus, Geo-tagging, Touch Focus, Face Detection, Panorama, HDR |
| Video | 1080p@30fps | 1080p@30fps | 1080p@30fps |
| Front Camera | 1.6 MP, 720p [Similar] | 1 MP, 720p [Similar] | 5 MP, 1080p [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSDPA, HSUPA; LTE, Cat 3/4 (market dependant), 150 Mbps DL, 50 Mbps UL | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps | HSPA 42.2/5.76 Mbps, LTE Cat6 300/50 Mbps |
| Bluetooth | v4.0, A2DP | v4.0, A2DP | v4.1, A2DP, EDR, LE |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n, dual band, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, DLNA, hotspot | Wi-Fi 802.11 a/b/g/n, dual-band, WiFi Direct, hotspot |
| USB | microUSB v2.0 | microUSB v2.0 | microUSB v2.0 |
| GPS | Yes, with A-GPS | Yes, with A-GPS, GLONASS, Beidou | Yes, with A-GPS, GLONASS/ Beidou (market dependant) |
| Browser | HTML5 | HTML5 | HTML5 |
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| Internal | 16 GB, 2 GB RAM | 8 GB, 1 GB RAM | 16/32 GB, 2 GB RAM |
| Expandable Storage | microSD, up to 32 GB | microSD, up to 128 GB | microSD, up to 128 GB (uses SIM 2 slot) |
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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-Ion Battery | Non-removable Li-Ion Battery |
| Capacity | 3400 mAh | 2500 mAh | 3050 mAh |
| Stand by | Up to 360 h | Up to 864 h (2G) Up to 864 h (3G) |
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| Talk Time | Up to 14 h | Up to 26 h 30 min (2G) Up to 17 h 30 min (3G) |
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