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| Phone | Siemens M55 | AT&T Calypso | Ericsson R278d | Nokia N97 mini |
| Current U.S. Carriers | (none) | (none) | (none) | (none) |
| Global Availability | Released | Released | Released | Released |
| Specifications | ||||
|---|---|---|---|---|
| Display Size | ? |
5.5" diag. 18 : 9 |
? |
3.2" diag. 16 : 9 |
| Display Resolution & Type |
101 x 80 pixels LCD (Color) |
480 x 960 pixels (~195 ppi) LCD (TFT/TFD) |
101 x 40 pixels |
360 x 640 pixels (~229 ppi) LCD (TFT/TFD) |
| Display Refresh | ? | 60 Hz | ? | ? |
| Battery | 700 mAh | 2,500 mAh | ? | 1,200 mAh |
| Processor | ? | 1.5 GHz MediaTek MT6739 | ? | 434 MHz ARM 11 |
| RAM | ? | 1 GB | ? | ? |
| Storage | ? raw hardware | 16 GB | ? raw hardware | 8 GB |
| Main Camera | - | 5 megapixel | - | 5 megapixel |
| Wide Camera | - | - | - | - |
| Tele Camera | - | - | - | - |
| Video Capture | - | 1080p HD | - | VGA (640 x 480) |
| Front Camera | - | 5 megapixel | - | - |
| Weight |
2.93 oz (83g) |
6 oz (170g) |
9.28 oz (263g) |
4.87 oz (138g) |
| Dimensions |
3.98" x 1.81" x 0.83" (101 x 46 x 21.1 mm) |
5.91" x 2.87" x 0.39" (150 x 73 x 9.9 mm) |
5.1" x 2" x 1" (130 x 51 x 25.4 mm) |
4.45" x 2.07" x 0.56" (113 x 52 x 14.2 mm) |
| Form Factor | Slab | Slab | Slab | Slide |
| Platform / OS | (proprietary) | Android | (proprietary) | S60 (Symbian) |
| Network Bands |
GSM: 900, 1800, 1900 |
4G LTE: 2, 4, 5, 12, 14, 30 WCDMA: 2, 4, 5 GSM: 850, 900, 1800, 1900 |
TDMA: 850, 1900 AMPS: 850 |
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| Data Technology | GPRS | LTE (Cat 4) | - | HSDPA 3.6 |
| Features | ||||
| Flashlight | - | Yes | - | - |
| GPS / Location | Yes | n/a | - | n/a |
| Accessibility | ||||
| Hearing Aid Compatible | - |
Yes M3, T4 (very tele-coil compatible) |
- | - |
| Multiple Languages | Yes | n/a | Yes | n/a |
| TTY/TDD (Digital) | Yes | Yes | - | - |
| Alerts | ||||
| Ringer Profiles | - | - | Yes | Yes |
| Connectivity | ||||
| Bluetooth | - | Yes | - | Yes |
| USB | - |
Yes USB Type C |
- |
Yes Micro-USB |
| Wi-Fi | - |
Yes 4 (802.11 b,g,n) |
- |
Yes 802.11 b,g |
| Contacts | ||||
| Picture ID | - | n/a | - | n/a |
| Ringer ID | - | n/a | - | n/a |
| Voice Dialing | Yes | n/a | - | n/a |
| Customization | ||||
| Custom Graphics | Yes | n/a | - | n/a |
| Custom Ringtones | Yes | n/a | Yes | n/a |
| Real-Music Ringers | - | n/a | - | n/a |
| Data & Network | ||||
| Data Tethering | Yes | n/a | Yes | n/a |
| WAP / Web Browser | Yes | n/a | Yes | n/a |
| Input | ||||
| Predictive Text Entry | Yes | n/a | Yes | n/a |
| Side Keys | Yes | Yes | Yes | Yes |
| Text Keyboard, Hardware | - | - | - | Yes |
| Touch Screen | - |
Yes Capacitive |
- |
Yes Resistive |
| Memory | ||||
| Memory Card Slot | - | Yes | - | Yes |
| Messaging | ||||
| Email Client | Yes | n/a | - | n/a |
| EMS / Picture Messaging | Yes | n/a | - | n/a |
| MMS | Yes | n/a | - | n/a |
| Text Messaging Templates | - | n/a | - | n/a |
| Music | ||||
| FM Radio | - | - | - | Yes |
| Headphone Jack (3.5mm) | - | Yes | - | Yes |
| Music Player | - | n/a | - | n/a |
| Stereo Speakers | - | - | - | Yes |
| Photo & Video | ||||
| TV Output | - | - | - | Yes |
| Video Calling | - | n/a | - | n/a |
| Productivity | ||||
| Alarm | - | n/a | Yes | n/a |
| Calculator | - | n/a | - | n/a |
| Calendar | Yes | n/a | - | n/a |
| To-Do List | - | n/a | - | n/a |
| Voice Memo | - | n/a | - | n/a |
| Software | ||||
| Games | Yes | n/a | - | n/a |
| Java (J2ME) | Yes | n/a | - | n/a |
| Voice | ||||
| HD Voice | - | Yes | - | - |
| Speaker Phone | Yes | Yes | - | Yes |
| Siemens M55 | AT&T Calypso | Ericsson R278d | Nokia N97 mini | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Siemens M55 | AT&T Calypso | Ericsson R278d | Nokia N97 mini |
