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| Phone | Ericsson R278d | Cricket Debut S2 / AT&T Calypso 4 | ZTE Z998 / Unico LTE | Sonim XP3 |
| Current U.S. Carriers | (none) |
AT&T Cricket |
(none) | (none) |
| Global Availability | Released | Released | Released | Released |
| Specifications | ||||
|---|---|---|---|---|
| Display Size | ? |
6.1" diag. 19.5 : 9 |
4.5" diag. 16 : 9 |
2.6" diag. 4 : 3 |
| Display Resolution & Type | 101 x 40 pixels |
720 x 1560 pixels (~282 ppi) LCD (TFT/TFD) |
540 x 960 pixels (~245 ppi) LCD (TFT/TFD) |
240 x 320 pixels (~154 ppi) LCD (TFT/TFD) |
| Display Refresh | ? | 60 Hz | 60 Hz | ? |
| Battery | ? | 3,000 mAh | 2,070 mAh | 1,500 mAh |
| Processor | ? | 2 GHz MediaTek Helio A22 (MT6761WB) | 1.2 GHz Qualcomm Snapdragon 400 MSM8930 | 1.1 GHz Qualcomm Snapdragon 210 (MSM8909) |
| RAM | ? | 3 GB | 1 GB | 1 GB |
| Storage | ? raw hardware | 64 GB | 4 GB | 8 GB |
| Main Camera | - | 8 megapixel | 5 megapixel | 5 megapixel |
| Wide Camera | - | - | - | - |
| Tele Camera | - | - | - | - |
| Video Capture | - | ? | 720p HD | ? |
| Front Camera | - | 5 megapixel | 1 megapixel | - |
| Weight |
9.28 oz (263g) |
5.64 oz (160g) |
4.8 oz (136g) |
6.88 oz (195g) |
| Dimensions |
5.1" x 2" x 1" (130 x 51 x 25.4 mm) |
6.11" x 2.87" x 0.34" (155 x 73 x 8.6 mm) |
5.2" x 2.6" x 0.4" (132 x 66 x 10.2 mm) |
4.4" x 2.3" x 1.1" (112 x 58 x 27.9 mm) |
| Form Factor | Slab | Slab | Slab | Clamshell |
| Platform / OS | (proprietary) | Android | Android | (proprietary) |
| Network Bands |
TDMA: 850, 1900 AMPS: 850 |
4G LTE: 2, 3, 4, 5, 7, 12, 14, 20, 30, 66 WCDMA: 1, 2, 4, 5, 8 |
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 |
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| Data Technology | - | LTE (Cat 4) | LTE (Cat 3) | LTE (Cat 4) |
| Features | ||||
| Barometer | - | - | - | Yes |
| Flashlight | - | Yes | - | Yes |
| GPS / Location | - | n/a | n/a | Yes |
| Ruggedized | - | - | - | Yes |
| Water-Resistant | - | - | - |
Yes IPX8 (SCUBA) |
| Accessibility | ||||
| Adjustable Text Size | - | n/a | n/a | Yes |
| Hearing Aid Compatible | - |
Yes M4, T4 (very tele-coil compatible) |
Yes M3, T4 (very tele-coil compatible) |
Yes M3, T4 (very tele-coil compatible) |
| Multiple Languages | Yes | n/a | n/a | Yes |
| TTY/TDD (Digital) | - | - | Yes | Yes |
| Alerts | ||||
| Extra Display | - | - | - | Yes |
| Ringer Profiles | Yes | - | - | Yes |
| Connectivity | ||||
| Bluetooth | - | Yes | Yes | Yes |
| Mobile Hotspot | - | n/a | n/a | Yes |
| USB | - |
Yes USB Type C |
Yes Micro-USB |
Yes USB Type C |
| Wi-Fi | - |
Yes 5 (802.11 a,ac,b,g,n) |
Yes 4 (802.11 b,g,n) |
Yes 4 (802.11 a,b,g,n) |
| Contacts | ||||
| Picture ID | - | n/a | n/a | - |
| Ringer ID | - | n/a | n/a | Yes |
| Voice Dialing | - | n/a | n/a | Yes |
| Customization | ||||
| Custom Graphics | - | n/a | n/a | Yes |
| Custom Ringtones | Yes | n/a | n/a | Yes |
| Real-Music Ringers | - | n/a | n/a | - |
| Data & Network | ||||
| Data Tethering | Yes | n/a | n/a | Yes |
| Dual-SIM | - | - | - | Yes |
| WAP / Web Browser | Yes | n/a | n/a | Yes |
| Input | ||||
| Predictive Text Entry | Yes | n/a | n/a | Yes |
| Side Keys | Yes | Yes | Yes | Yes |
| Touch Screen | - |
Yes Capacitive |
Yes Capacitive |
- |
| Memory | ||||
| Memory Card Slot | - | Yes | Yes | Yes |
| Messaging | ||||
| Email Client | - | n/a | n/a | - |
| Instant Messaging | - | n/a | n/a | - |
| MMS | - | n/a | n/a | Yes |
| Text Messaging Templates | - | n/a | n/a | Yes |
| Music | ||||
| FM Radio | - | - | - | Yes |
| Headphone Jack (3.5mm) | - | Yes | Yes | Yes |
| Music Player | - | n/a | n/a | Yes |
| Power | ||||
| Fast Charging | - | Yes | - | - |
| Productivity | ||||
| Alarm | Yes | n/a | n/a | Yes |
| Calculator | - | n/a | n/a | Yes |
| Calendar | - | n/a | n/a | Yes |
| Voice Memo | - | n/a | n/a | Yes |
| Software | ||||
| Games | - | n/a | n/a | - |
| Voice | ||||
| HD Voice | - | Yes | - | Yes |
| Push-To-Talk | - | - | - | Yes |
| Speaker Phone | - | Yes | Yes | Yes |
| * Some versions only | ||||
| Ericsson R278d | Cricket Debut S2 / AT&T Calypso 4 | ZTE Z998 / Unico LTE | Sonim XP3 | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Ericsson R278d | Cricket Debut S2 / AT&T Calypso 4 | ZTE Z998 / Unico LTE | Sonim XP3 |
