Phone Comparison - Panasonic P81 vs HTC Desire 820 vs Nokia Lumia 730 Dual SIM
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| Manufacturer | Panasonic | HTC | Nokia |
| Announced | June 2014 | September 2014 | September 2014 |
| Status | Available - June 2014 | Coming Soon - September 2014 | Available - September 2014 |
| Colors | Black | Marble White, Tuxedo Grey, Santorini White, Milky-way Grey, Tang | Orange, green, white, black |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
7.9 mm thickness (0.31 in thickness) |
157.7 x 78.7 x 7.7 mm (6.21 x 3.1 x 0.3 in) |
134.7 x 68.5 x 8.9 mm (5.3 x 2.7 x 0.35 in) |
| Weight | - | 155 g (5.47 oz) | 134 g (4.73 oz) |
| 2G Network | GSM 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 - EMEA version HSDPA 900 / 2100 - Asia version |
HSDPA 850 / 900 / 1900 / 2100 |
| 4G Network | - | LTE 900 / 1800 / 2100 / 2600 - EMEA version | - |
| Messaging | SMS, MMS, EMail, IM | SMS, MMS, Push Mail, EMail | SMS, MMS, Push Mail, EMail, IM |
| Build Features | - | - | ClearBlack display |
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| OS | Android OS, v4.2.2 (Jelly Bean) | Android OS, v4.4.2 (KitKat) | Microsoft Windows Phone 8.1 |
| Processor | Octa-core 1.7 GHz Cortex-A7, Mediatek MT6592 | Quad-core 1.5 GHz Cortex-A53 & quad-core 1.0 GHz Cortex-A53, Qualcomm MSM8939 Snapdragon 615 | Quad-core 1.2 GHz Cortex-A7, Qualcomm Snapdragon 400 |
| GPU | Mali-450MP4 | Adreno 405 | Adreno 305 |
| RAM | 1 GB | 2 GB | 1 GB |
| Internal Memory | 8 GB | 16 GB | 8 GB |
| External Memory | microSD, up to 32 GB | microSD, up to 128 GB | microSD, up to 128 GB |
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| Type | IPS LCD capacitive touchscreen | LCD Capacitive Touchscreen | AMOLED Capacitive Touchscreen, Corning Gorilla Glass 3 |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 5.5 inches | 5.5 inches | 4.7 inches |
| Resolution | 720 x 1280 pixels (267 ppi) | 720 x 1280 pixels (267 ppi) | 720 x 1280 pixels (312 ppi) |
| Screen-to-Body Ratio | - | 67.20% | 66.20% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM radio with RDS | No | FM radio |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 13 MP, 4160 x 3120 pixels | 13 MP, 4160 x 3120 pixels | 6.7 MP, Carl Zeiss optics |
| Flash | LED flash | LED flash | LED flash |
| Features | Auto focus, Geo-tagging | Auto focus, Geo-tagging, Touch Focus, Face Detection, Simultaneous HD Video And Image Recording, HDR | Auto focus, 1/3.4'' Sensor Size, Geo-tagging, Face Detection, Panorama |
| Video | Yes, 1080p@30fps | 1080p@30fps, 720p@60fps | 1080p@30fps, stereo sound rec. |
| Front Camera | Yes, 2 MP [Similar] | 8 MP, 1080p [Similar] | 5 MP, 720p [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Up to 296 kbps |
| 3G | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps | HSDPA, 42 Mbps; HSUPA, 5.8 Mbps; LTE, Cat4, 50 Mbps UL, 150 Mbps DL | HSDPA, 21.1 Mbps; HSUPA, 5.76 Mbps |
| Bluetooth | Yes, v3.0 with A2DP | v4.0, A2DP | v4.0, A2DP |
| Wi-Fi | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, 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, Wi-Fi hotspot |
| USB | Yes, microUSB v2.0 | microUSB v2.0 | microUSB v2.0 |
| GPS | Yes, with A-GPS support | Yes, with A-GPS, GLONASS | Yes, with A-GPS, GLONASS, Beidou |
| Browser | HTML5 | HTML5 | HTML5 |
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| Internal | 8 GB, 1 GB RAM | 16 GB, 2 GB RAM | 8 GB, 1 GB RAM |
| Expandable Storage | microSD, up to 32 GB | microSD, up to 128 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 | Non-removable Li-Ion Battery | Non-removable Li-Po Battery | Li-Ion Battery (BV-T5A) |
| Capacity | 2500 mAh | 2600 mAh | 2200 mAh |
| Stand by | - | Up to 424 h (3G) | Up to 600 h |
| Talk Time | - | Up to 22 h 24 min (3G) | Up to 22 h (2G) Up to 17 h (3G) |
