Phone Comparison - Panasonic P81 vs Panasonic Eluga U vs HTC Desire 820
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| Manufacturer | Panasonic | Panasonic | HTC |
| Announced | June 2014 | July 2014 | September 2014 |
| Status | Available - June 2014 | Available - July 2014 | Coming Soon - September 2014 |
| Colors | Black | Black, White | Marble White, Tuxedo Grey, Santorini White, Milky-way Grey, Tang |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
7.9 mm thickness (0.31 in thickness) |
141.5 x 71.3 x 7.95 mm (5.57 x 2.81 x 0.31 in) |
157.7 x 78.7 x 7.7 mm (6.21 x 3.1 x 0.3 in) |
| Weight | - | 141 g (4.97 oz) | 155 g (5.47 oz) |
| 2G Network | GSM 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 |
| 3G Network | HSDPA 900 / 2100 | HSDPA 900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 - EMEA version HSDPA 900 / 2100 - Asia version |
| 4G Network | - | - | LTE 900 / 1800 / 2100 / 2600 - EMEA version |
| Messaging | SMS, MMS, EMail, IM | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, Push Mail, EMail |
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| OS | Android OS, v4.2.2 (Jelly Bean) | Android OS, v4.4.2 (KitKat) | Android OS, v4.4.2 (KitKat) |
| Processor | Octa-core 1.7 GHz Cortex-A7, Mediatek MT6592 | Quad-core 1.2 GHz Cortex-A7, Qualcomm Snapdragon 400 | Quad-core 1.5 GHz Cortex-A53 & quad-core 1.0 GHz Cortex-A53, Qualcomm MSM8939 Snapdragon 615 |
| GPU | Mali-450MP4 | Adreno 305 | Adreno 405 |
| RAM | 1 GB | 2 GB | 2 GB |
| Internal Memory | 8 GB | 16 GB | 16 GB |
| External Memory | microSD, up to 32 GB | microSD, up to 32 GB | microSD, up to 128 GB |
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| Type | IPS LCD capacitive touchscreen | IPS LCD Capacitive Touchscreen, Corning Gorilla Glass 3 | LCD Capacitive Touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 5.5 inches | 5.0 inches | 5.5 inches |
| Resolution | 720 x 1280 pixels (267 ppi) | 720 x 1280 pixels (294 ppi) | 720 x 1280 pixels (267 ppi) |
| Screen-to-Body Ratio | - | 68.18% | 67.20% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM radio with RDS | FM radio | No |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 13 MP, 4160 x 3120 pixels | 13 MP, 4128 x 3096 pixels | 13 MP, 4160 x 3120 pixels |
| Flash | LED flash | LED flash | LED flash |
| Features | Auto focus, Geo-tagging | Auto focus, Geo-tagging, Touch Focus, Face Detection, HDR, Panorama | Auto focus, Geo-tagging, Touch Focus, Face Detection, Simultaneous HD Video And Image Recording, HDR |
| Video | Yes, 1080p@30fps | Yes, 720p@30fps, stereo sound rec., HDR | 1080p@30fps, 720p@60fps |
| Front Camera | Yes, 2 MP [Similar] | Yes, 2 MP [Similar] | 8 MP, 1080p [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps | HSDPA, 42 Mbps; HSUPA, 5.8 Mbps; LTE, Cat4, 50 Mbps UL, 150 Mbps DL |
| Bluetooth | Yes, v3.0 with A2DP | Yes, v4.0 with A2DP, LE | v4.0, A2DP |
| Wi-Fi | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, Wi-Fi hotspot | 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 |
| USB | Yes, microUSB v2.0 | Yes, microUSB v2.0, USB Host | microUSB v2.0 |
| GPS | Yes, with A-GPS support | Yes, with A-GPS support and GLONASS | Yes, with A-GPS, GLONASS |
| Browser | HTML5 | HTML5 | HTML5 |
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| Internal | 8 GB, 1 GB RAM | 16 GB, 2 GB RAM | 16 GB, 2 GB RAM |
| Expandable Storage | microSD, up to 32 GB | microSD, up to 32 GB | microSD, up to 128 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 | Non-removable Li-Ion Battery | Li-Ion Battery | Non-removable Li-Po Battery |
| Capacity | 2500 mAh | 2500 mAh | 2600 mAh |
| Stand by | - | - | Up to 424 h (3G) |
| Talk Time | - | - | Up to 22 h 24 min (3G) |
