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| Phone | Ericsson R278d | Sonim XP3 | Cricket Debut S2 / AT&T Calypso 4 |
| Current U.S. Carriers | (none) | (none) | AT&T |
| Global Availability | Released | Released | Released |
| Specifications | |||
|---|---|---|---|
| Display Size | ? |
2.6" diag. 4 : 3 |
6.1" diag. 19.5 : 9 |
| Display Resolution & Type | 101 x 40 pixels |
240 x 320 pixels (~154 ppi) LCD (TFT/TFD) |
720 x 1560 pixels (~282 ppi) LCD (TFT/TFD) |
| Display Refresh | ? | ? | 60 Hz |
| Battery | ? | 1,500 mAh | 3,000 mAh |
| Processor | ? | 1.1 GHz Qualcomm Snapdragon 210 (MSM8909) | 2 GHz MediaTek Helio A22 (MT6761WB) |
| RAM | ? | 1 GB | 3 GB |
| Storage | ? raw hardware | 8 GB | 64 GB |
| Main Camera | - | 5 megapixel | 8 megapixel |
| Wide Camera | - | - | - |
| Tele Camera | - | - | - |
| Video Capture | - | ? | ? |
| Front Camera | - | - | 5 megapixel |
| Weight |
9.28 oz (263g) |
6.88 oz (195g) |
5.64 oz (160g) |
| Dimensions |
5.1" x 2" x 1" (130 x 51 x 25.4 mm) |
4.4" x 2.3" x 1.1" (112 x 58 x 27.9 mm) |
6.11" x 2.87" x 0.34" (155 x 73 x 8.6 mm) |
| Form Factor | Slab | Clamshell | Slab |
| Platform / OS | (proprietary) | (proprietary) | Android |
| Network Bands |
TDMA: 850, 1900 AMPS: 850 |
4G LTE: 1, 2, 3, 4, 5, 8, 12, 13, 14, 25, 26, 38, 41, 66 WCDMA: 1, 2, 4, 5, 8 CDMA: 800, 850, 1900 GSM: 850, 900, 1800, 1900 |
4G LTE: 2, 3, 4, 5, 7, 12, 14, 20, 30, 66 WCDMA: 1, 2, 4, 5, 8 |
| Data Technology | - | LTE (Cat 4) | LTE (Cat 4) |
| Features | |||
| Barometer | - | Yes | - |
| Flashlight | - | Yes | Yes |
| GPS / Location | - | Yes | n/a |
| Ruggedized | - | Yes | - |
| Water-Resistant | - |
Yes IPX8 (SCUBA) |
- |
| Accessibility | |||
| Adjustable Text Size | - | Yes | n/a |
| Hearing Aid Compatible | - |
Yes M3, T4 (very tele-coil compatible) |
Yes M4, T4 (very tele-coil compatible) |
| Multiple Languages | Yes | Yes | n/a |
| TTY/TDD (Digital) | - | Yes | - |
| Alerts | |||
| Extra Display | - | Yes | - |
| Ringer Profiles | Yes | Yes | - |
| Connectivity | |||
| Bluetooth | - | Yes | Yes |
| Mobile Hotspot | - | Yes | n/a |
| USB | - |
Yes USB Type C |
Yes USB Type C |
| Wi-Fi | - |
Yes 4 (802.11 a,b,g,n) |
Yes 5 (802.11 a,ac,b,g,n) |
| Contacts | |||
| Ringer ID | - | Yes | n/a |
| Voice Dialing | - | Yes | n/a |
| Customization | |||
| Custom Graphics | - | Yes | n/a |
| Custom Ringtones | Yes | Yes | n/a |
| Data & Network | |||
| Data Tethering | Yes | Yes | n/a |
| Dual-SIM | - | Yes | - |
| WAP / Web Browser | Yes | Yes | n/a |
| Input | |||
| Predictive Text Entry | Yes | Yes | n/a |
| Side Keys | Yes | Yes | Yes |
| Touch Screen | - | - |
Yes Capacitive |
| Memory | |||
| Memory Card Slot | - | Yes | Yes |
| Messaging | |||
| MMS | - | Yes | n/a |
| Text Messaging Templates | - | Yes | n/a |
| Music | |||
| FM Radio | - | Yes | - |
| Headphone Jack (3.5mm) | - | Yes | Yes |
| Music Player | - | Yes | n/a |
| Power | |||
| Fast Charging | - | - | Yes |
| Productivity | |||
| Alarm | Yes | Yes | n/a |
| Calculator | - | Yes | n/a |
| Calendar | - | Yes | n/a |
| Voice Memo | - | Yes | n/a |
| Voice | |||
| HD Voice | - | Yes | Yes |
| Push-To-Talk | - | Yes | - |
| Speaker Phone | - | Yes | Yes |
| Ericsson R278d | Sonim XP3 | Cricket Debut S2 / AT&T Calypso 4 | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Ericsson R278d | Sonim XP3 | Cricket Debut S2 / AT&T Calypso 4 |
