Phone Comparison - Micromax A25 Smarty vs Karbonn Titanium Octane Plus vs Microsoft Lumia 535 Dual SIM
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| Manufacturer | Micromax | Karbonn | Microsoft |
| Announced | October 2012 | March 2014 | November 2014 |
| Status | Available - October 2012 | Available - April 2014 | Available - November 2014 |
| Price | - | - | Rs. 7,999 ($117.63) [Similarly Priced] |
| Colors | Black | Black, White | Orange, green, white, black, gray, blue |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
104.5 x 56 x 13 mm (4.11 x 2.2 x 0.51 in) |
147.3 x 72.6 x 7.6 mm (5.8 x 2.86 x 0.3 in) |
140.2 x 72.4 x 8.8 mm (5.52 x 2.85 x 0.35 in) |
| Weight | 102 g (3.6 oz) | - | 146 g (5.15 oz) |
| 2G Network | GSM 900 / 1800 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 |
| 3G Network | N/A | HSDPA 2100 | HSDPA 900 / 2100 |
| Messaging | SMS, MMS, EMail, IM | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, Push Mail, EMail, IM |
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| OS | Android OS, v2.3.6 (Gingerbread) | Android OS, v4.4 (KitKat) | Microsoft Windows Phone 8.1 |
| Processor | 1 GHz | Octa-core 1.7 GHz, Mediatek MT6592 | Quad-core 1.2 GHz Cortex-A7, Qualcomm Snapdragon 200 |
| GPU | - | Mali-450MP4 | Adreno 302 |
| RAM | 256 MB | 2 GB | 1 GB |
| Internal Memory | 120 MB storage | 16 GB ROM | 8 GB |
| External Memory | microSD, up to 32 GB | microSD, up to 32 GB | microSD, up to 128 GB |
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| Type | TFT capacitive touchscreen | IPS LCD Capacitive Touchscreen | IPS LCD Capacitive Touchscreen, Corning Gorilla Glass 3 |
| Colors | 256K colors | 16M colors | 16M colors |
| Size | 2.8 inches | 5.0 inches | 5.0 inches |
| Resolution | 240 x 320 pixels (143 ppi) | 1080 x 1920 pixels (441 ppi) | 540 x 960 pixels (220 ppi) |
| Screen-to-Body Ratio | 41.40% | 64.32% | 68.08% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM radio | FM Radio with Recording | FM radio |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 1.3 MP, 1280 x 1024 pixels | 16 MP, 4616 x 3464 pixels | 5 MP, 2592 x 1936 pixels |
| Flash | No | LED flash | LED flash |
| Features | - | Auto focus, Geo-tagging, Touch Focus, Face Detection, 360 degree Panorama, HDR, Image Stabilization | Auto focus, 1/4' Sensor Size, Geo-tagging |
| Video | Yes | Yes, 1080p@30fps | 480p@30fps |
| Front Camera | No [Similar] | Yes, 5 MP, 1080p [Similar] | 5 MP [Similar] |
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| GPRS | Class 12 (4+1/3+2/2+3/1+4 slots), 32 - 48 kbps | Yes | Yes |
| Edge | Class 12 | Yes | Up to 236 kbps |
| 3G | N/A | HSDPA, 42.2 Mbps, HSUPA, 11.5 Mbps | HSPA 42.2/5.76 Mbps |
| Bluetooth | Yes, v2.1 | Yes, v4.0 | v4.0, A2DP |
| Wi-Fi | Wi-Fi 802.11 b/g/n | Wi-Fi 802.11 b/g/n, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, DLNA, Wi-Fi hotspot |
| USB | Yes, microUSB v2.0 | Yes, microUSB v2.0 | microUSB v2.0 |
| GPS | No | Yes, with A-GPS support | Yes, with A-GPS, GLONASS |
| Browser | HTML | HTML5 | HTML5 |
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| Internal | 120 MB storage, 256 MB RAM, 512 MB ROM | 16 GB ROM, 2 GB RAM | 8 GB, 1 GB RAM |
| Expandable Storage | microSD, up to 32 GB | microSD, up to 32 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-Po battery | Li-Ion Battery (BL-L4A) |
| Capacity | 1280 mAh | 2000 mAh | 1905 mAh |
| Stand by | Up to 180 h | - | Up to 336 h |
| Talk Time | Up to 4 h | - | Up to 11 h (2G) Up to 13 h (3G) |
