Phone Comparison - Nokia Lumia 638 vs Samsung Galaxy Grand Max vs Asus Zenfone 2 ZE550ML
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| Manufacturer | Nokia | Samsung | Asus |
| Announced | December 2014 | January 2015 | March 2015 |
| Status | Available - December 2014 | Available - January 2015 | Available - March 2015 |
| Price | Rs. 7,999 ($117.63) [Similarly Priced] | Rs. 13,999 ($205.87) [Similarly Priced] | Rs. 13,990 ($205.74) [Similarly Priced] |
| Colors | Black | Black, White | Red, Grey, Black, White and Gold |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
129.5 x 66.7 x 9.2 mm (5.1 x 2.63 x 0.36 in) |
146 x 74.8 x 7.9 mm (5.75 x 2.94 x 0.31 in) |
152.5 x 77.2 x 10.9 mm (6 x 3.04 x 0.43 in) |
| Weight | 136 g (4.8 oz) | 161 g (5.68 oz) | 170 g (6 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 |
| 4G Network | LTE 1800 / 1900 / 2100 / 2300 / 2500 / 2600 (Bands 3, 7, 38, 39, 40, 41) | LTE 800 / 850 / 900 / 1800 / 2100 / 2600 (Bands 1, 3, 5, 7, 8, 20) | 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) |
| Messaging | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, Push Mail, EMail, IM |
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| OS | Microsoft Windows Phone 8.1 | Android OS, v4.4.2 (KitKat) | Android OS, v5.0 (Lollipop) |
| Processor | Quad-core 1.2 GHz Cortex-A7, Qualcomm Snapdragon 400 | Quad-core 1.2 GHz Cortex-A53, Qualcomm MSM8916 Snapdragon 410 | Quad-core 1.8 GHz, Intel Atom Z3560 |
| GPU | Adreno 305 | Adreno 306 | PowerVR G6430 |
| RAM | 1 GB | 1.5 GB | 2 GB |
| Internal Memory | 8 GB | 16 GB | 16 GB |
| External Memory | microSD, up to 128 GB | microSD, up to 64 GB | microSD, up to 64 GB |
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| Type | IPS LCD capacitive touchscreen, Corning Gorilla Glass 3, ClearBlack Display | IPS LCD capacitive touchscreen | IPS Capacitive Touchscreen, Corning Gorilla Glass 3 |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 4.5 inches | 5.25 inches | 5.5 inches |
| Resolution | 480 x 854 pixels (218 ppi) | 720 x 1280 pixels (280 ppi) | 1080 x 1920 pixels (403 ppi) |
| Screen-to-Body Ratio | 64.43% | 69.44% | 69.97% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM radio | FM Radio | Yes |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 5 MP, 2592 х 1944 pixels | 13 MP, 4128 x 3096 pixels | 13 MP, 4128 x 3096 pixels |
| Flash | No | LED flash | dual-LED (dual tone) |
| Features | Auto focus, 1/4 | Auto focus, Geo-tagging, Face Detection, Panorama, HDR, Wide Selfie, Rear-cam Selfie | Auto focus, Geo-tagging, Touch Focus, Face Detection, Panorama, HDR |
| Video | Yes | 1080p@30fps | 1080p@30fps |
| Front Camera | No [Similar] | 5 MP, 1080p [Similar] | 5 MP [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps | HSDPA, 42 Mbps; HSUPA, 5.8 Mbps; LTE, Cat4, 50 Mbps UL, 150 Mbps DL | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps |
| Bluetooth | v4.0, A2DP, LE/ apt-X after WP8 Denim update | v4.0, BLE, ANT+ | v4.0, A2DP, EDR |
| Wi-Fi | Wi-Fi 802.11 b/g/n, DLNA, hotspot | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi hotspot | Wi-Fi 802.11 a/b/g/n/ac, Wi-Fi Direct, hotspot |
| USB | microUSB v2.0 | microUSB v2.0 | microUSB v2.0, USB Host |
| 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 | 16 GB, 1.5 GB RAM | 16 GB, 2 GB RAM |
| Expandable Storage | microSD, up to 128 GB | microSD, up to 64 GB | microSD, up to 64 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 | Non-removable Li-Po Battery |
| Capacity | 1830 mAh | 2500 mAh | 3000 mAh |
| Stand by | - | Up to 386 h | - |
| Talk Time | - | - | - |
