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| Phone | LG K40 / Harmony 3 | Samsung Galaxy J7 (2017, GSM) / J7 Prime / Halo | Red Hydrogen One |
| Current U.S. Carriers | (none) | (none) | (none) |
| Global Availability | Released | Released | Released |
| Specifications | |||
|---|---|---|---|
| Display Size |
5.7" diag. 18 : 9 |
5.5" diag. 16 : 9 |
5.7" diag. 16 : 9 |
| Display Resolution & Type |
720 x 1440 pixels (~282 ppi) LCD (TFT/TFD) |
720 x 1280 pixels (~267 ppi) LCD (TFT/TFD) |
1440 x 2560 pixels (~515 ppi) LCD (TFT/TFD) |
| Display Refresh | 60 Hz | 60 Hz | 60 Hz |
| Battery | 3,000 mAh | 3,300 mAh | 4,510 mAh |
| Processor | 1.8 GHz Qualcomm Snapdragon 450 | 1.6 GHz Samsung Exynos 7870 | 2.5 GHz Qualcomm Snapdragon 835 (MSM8998) |
| RAM | 2 GB | 2 GB | 6 GB |
| Storage | 32 GB | 16 GB * | 128 GB * |
| Main Camera | 13 megapixel | 8 megapixel | 12 megapixel |
| Wide Camera | - | - | - |
| Tele Camera | - | - | - |
| Video Capture | 1080p HD | 1080p HD | 4K UHD |
| Front Camera | 5 megapixel | Yes | 8 megapixel |
| Weight |
5.11 oz (145g) |
5.8 oz (164g) |
9.63 oz (273g) |
| Dimensions |
6.02" x 2.83" x 0.32" (153 x 72 x 8.1 mm) |
5.96" x 3.01" x 0.34" (151 x 76 x 8.6 mm) |
6.54" x 3.28" x 0.39" (166 x 83 x 10 mm) |
| Platform / OS | Android | Android | Android |
| Network Bands |
4G LTE: 2, 4, 5, 12, 13, 14, 25, 26, 29, 30, 41, 66, 71 WCDMA: 2, 4, 5 CDMA: 800, 850, 1900 GSM: 850, 900, 1800, 1900 |
4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 28, 29, 30, 38, 39, 40, 41, 66 WCDMA: 1, 2, 4, 5, 8, 19 CDMA: 800, 850, 1900 GSM: 850, 900, 1800, 1900 |
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| Data Technology | LTE (Cat 6) | LTE (Cat 6) | LTE (Cat 12) |
| Features | |||
| Fingerprint Reader |
Yes stand-alone |
- |
Yes stand-alone |
| Flashlight | Yes | Yes | Yes |
| Accessibility | |||
| Hearing Aid Compatible |
Yes M3, T3 (mostly tele-coil compatible) |
Yes M3, T3 (mostly tele-coil compatible) |
Yes M4, T3 (mostly tele-coil compatible) |
| TTY/TDD (Digital) | Yes | Yes | Yes |
| Connectivity | |||
| Bluetooth | Yes | Yes | Yes |
| NFC | Yes * | - | Yes |
| USB |
Yes Micro-USB |
Yes Micro-USB |
Yes USB Type C |
| Wi-Fi |
Yes 5 (802.11 a,ac,b,g,n) |
Yes 5 (802.11 a,ac,b,g,n) |
Yes 5 (802.11 a,ac,b,g,n) |
| Input | |||
| Side Keys | Yes | Yes | Yes |
| Touch Screen |
Yes Capacitive |
Yes Capacitive |
Yes Capacitive |
| Memory | |||
| Memory Card Slot | Yes | Yes | Yes |
| Music | |||
| FM Radio | Yes | Yes | Yes |
| Headphone Jack (3.5mm) | Yes | Yes | Yes |
| Stereo Speakers | - | - | Yes |
| Photo & Video | |||
| DLNA | Yes | - | - |
| Power | |||
| Fast Charging | - | - | Yes |
| Voice | |||
| HD Voice | Yes | Yes | Yes |
| Speaker Phone | Yes | Yes | Yes |
| * Some versions only | |||
| LG K40 / Harmony 3 | Samsung Galaxy J7 (2017, GSM) / J7 Prime / Halo | Red Hydrogen One | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | LG K40 / Harmony 3 | Samsung Galaxy J7 (2017, GSM) / J7 Prime / Halo | Red Hydrogen One |
