Phone Comparison - Nokia Lumia 638 vs Microsoft Lumia 540 Dual SIM vs InFocus M530
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| Manufacturer | Nokia | Microsoft | InFocus |
| Announced | December 2014 | April 2015 | June 2015 |
| Status | Available - December 2014 | Available - May 2015 | Available - June 2015 |
| Price | Rs. 7,999 ($117.63) [Similarly Priced] | Rs. 8,100 ($119.12) [Similarly Priced] | Rs. 10,999 ($161.75) [Similarly Priced] |
| Colors | Black | Orange, white, black, cyan | Black, White |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
129.5 x 66.7 x 9.2 mm (5.1 x 2.63 x 0.36 in) |
144 x 73.7 x 9.4 mm (5.67 x 2.9 x 0.37 in) |
157 x 77 x 9.1 mm (6.18 x 3.03 x 0.36 in) |
| Weight | 136 g (4.8 oz) | 152 g (5.36 oz) | 176 g (6.21 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 900 / 2100 | HSDPA 850 / 2100 |
| 4G Network | LTE 1800 / 1900 / 2100 / 2300 / 2500 / 2600 (Bands 3, 7, 38, 39, 40, 41) | - | LTE 1800 / 2600 |
| Messaging | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, EMail, IM |
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| OS | Microsoft Windows Phone 8.1 | Microsoft Windows Phone 8.1 with Lumia Denim | Android OS, v4.4.4 (KitKat) |
| Processor | Quad-core 1.2 GHz Cortex-A7, Qualcomm Snapdragon 400 | Quad-core 1.2 GHz Cortex-A7, Qualcomm Snapdragon 200 | Quad-core 2.0 GHz Cortex-A17 & quad-core 1.7 GHz Cortex-A7, MediaTek MT6595 |
| GPU | Adreno 305 | Adreno 302 | PowerVR H6200MP4 |
| RAM | 1 GB | 1 GB | 2 GB |
| Internal Memory | 8 GB | 8 GB | 16 GB |
| External Memory | microSD, up to 128 GB | microSD, up to 128 GB | microSD, up to 32 GB |
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| Type | IPS LCD capacitive touchscreen, Corning Gorilla Glass 3, ClearBlack Display | IPS LCD Capacitive Touchscreen, Corning Gorilla Glass 3 | IPS LCD Capacitive Touchscreen, Corning Gorilla Glass 3 |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 4.5 inches | 5.0 inches | 5.5 inches |
| Resolution | 480 x 854 pixels (218 ppi) | 720 x 1280 pixels (294 ppi) | 720 x 1280 pixels (267 ppi) |
| Screen-to-Body Ratio | 64.43% | 64.82% | 68.99% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM radio | FM radio | No |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 5 MP, 2592 х 1944 pixels | 8 MP, 3264 x 2448 pixels | 13 MP, 4128 x 3096 pixels |
| Flash | No | LED flash | Dual-LED (Dual Tone) |
| Features | Auto focus, 1/4 | Auto focus, Sensor size: 1/4 inch, f/2.2 aperture | Auto focus, OIS, Sony IMX214 Exmor RS Sensor, Geo-tagging, Touch Focus, Face Detection, Image Stabilization, HDR, Panorama |
| Video | Yes | 480p@30fps | 1080p@30fps |
| Front Camera | No [Similar] | 5 MP [Similar] | 13 MP, Auto focus, LED Flash, Sony Exmor [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Up to 236 kbps | Yes |
| 3G | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps | HSPA 42.2/5.76 Mbps | HSDPA, HSUPA |
| Bluetooth | v4.0, A2DP, LE/ apt-X after WP8 Denim update | v4.0, A2DP | v4.0, A2DP |
| Wi-Fi | Wi-Fi 802.11 b/g/n, DLNA, hotspot | Wi-Fi 802.11 b/g/n, DLNA, Wi-Fi hotspot | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct |
| USB | microUSB v2.0 | microUSB v2.0 | microUSB v2.0 (MHL), USB On-the-go |
| 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 | 8 GB, 1 GB RAM | 8 GB, 1 GB RAM | 16 GB, 2 GB RAM |
| Expandable Storage | microSD, up to 128 GB | microSD, up to 128 GB | microSD, up to 32 GB |
| 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 | Li-Ion Battery (BL-5H) | Li-Ion Battery | Removable Battery |
| Capacity | 1830 mAh | 2200 mAh | 3100 mAh |
| Stand by | - | Up to 576 h | Up to 590 h (3G) |
| Talk Time | - | Up to 26.2 h (2G) Up to 14.8 h (3G) |
Up to 12 h (3G) |
