Phone Comparison - Samsung Galaxy Ace Style vs Samsung Galaxy Mega 2 vs Microsoft Lumia 640 LTE
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| Manufacturer | Samsung | Samsung | Microsoft |
| Announced | April 2014 | August 2014 | March 2015 |
| Status | Available - April 2014 | Available - August 2014 | Available - April 2015 |
| Price | - | - | Rs. 7,999 ($117.63) [Similarly Priced] |
| Colors | Black, White | White, Black | Yes |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
121.2 x 62.7 x 10.7 mm (4.77 x 2.47 x 0.42 in) |
163.6 x 84.9 x 8.6 mm (6.44 x 3.34 x 0.34 in) |
141.3 x 72.2 x 8.8 mm (5.56 x 2.84 x 0.35 in) |
| Weight | 123 g (4.34 oz) | 194 g (6.84 oz) | 145 g (5.11 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 |
| 3G Network | HSDPA 900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 2100 |
| 4G Network | - | LTE 800 / 850 / 900 / 1800 / 1900 / 2100 / 2600 | LTE |
| Messaging | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, EMail, IM | SMS, MMS, Push Mail, EMail, IM |
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| OS | Android OS, v4.4.2 (KitKat) | Android OS, v4.4.3 (KitKat) | Microsoft Windows Phone 8.1 with Lumia Denim |
| Processor | Dual-core 1.2 GHz | Quad-core 1.5 GHz, Qualcomm Snapdragon 410 | Quad-core 1.2 GHz Cortex-A7, Qualcomm Snapdragon 400 |
| GPU | - | Adreno 306 | Adreno 305 |
| RAM | 512 MB | 1.5 GB | 1 GB |
| Internal Memory | 4 GB ROM | 8 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 | TFT capacitive touchscreen | TFT capacitive touchscreen | IPS LCD Capacitive Touchscreen, Corning Gorilla Glass 3, ClearBlack Display |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 4.0 inches | 6.0 inches | 5.0 inches |
| Resolution | 480 x 800 pixels (233 ppi) | 720 x 1280 pixels (245 ppi) | 720 x 1280 pixels (294 ppi) |
| Screen-to-Body Ratio | 60.05% | 71.32% | 67.43% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | Stereo FM radio with RDS | FM Radio | FM radio |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 5 MP, 2592x1944 pixels | 8 MP, 3264x2448 pixels | 8 MP, 3264 x 2448 pixels |
| Flash | No | LED flash | LED flash |
| Features | Auto focus, Sound & Shot, Best Shot, Best Photo, Geo-tagging, Face And Smile Detection | Auto focus, Geo-tagging, Touch Focus, Face And Smile Detection | Auto focus, 1/4'' Sensor Size |
| Video | Yes, 720p@30fps | Yes, 1080p@30fps | 1080p@30fps |
| Front Camera | Yes, VGA [Similar] | Yes, 2 MP, 720p [Similar] | 1 MP, 720p [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSDPA 14.4 Mbps, HSUPA 5.76 Mbps | HSDPA 42 Mbps, HSUPA; LTE, Cat4, 50 Mbps UL, 150 Mbps DL | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps |
| Bluetooth | Yes, v4.0 with A2DP | Yes, v4.0 with A2DP, LE | v4.0, A2DP |
| Wi-Fi | Wi-Fi 802.11 b/g/n, Wi-Fi hotspot | Wi-Fi 802.11 a/b/g/n, dual-band, Wi-Fi Direct, DLNA, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, DLNA, hotspot |
| USB | Yes, microUSB v2.0 | Yes, microUSB v2.0 | microUSB v2.0 |
| GPS | Yes, with A-GPS support and GLONASS | Yes, with A-GPS support and GLONASS | Yes, with A-GPS, GLONASS, Beidou |
| Browser | HTML5 | HTML5 | HTML5 |
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| Internal | 4 GB ROM, 512 MB RAM | 8 GB, 1.5 GB 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 | Li-Ion Battery | Li-Ion Battery | Li-Ion Battery |
| Capacity | 1500 mAh | 2800 mAh | 2500 mAh |
| Stand by | - | - | Up to 864 h (2G) Up to 864 h (3G) |
| Talk Time | - | - | Up to 26 h 30 min (2G) Up to 17 h 30 min (3G) |
