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| Phone | Nokia 1661 | Iris Flip | Ericsson T28 World | ZTE ZMAX Pro |
| Current U.S. Carriers | (none) | (none) | (none) | (none) |
| Global Availability | Released | Released | Released | Released |
| Specifications | ||||
|---|---|---|---|---|
| Display Size |
1.8" diag. 4 : 3 |
3.2" diag. 4 : 3 |
? |
6" diag. 16 : 9 |
| Display Resolution & Type |
128 x 160 pixels (~114 ppi) LCD (TFT/TFD) |
240 x 320 pixels (~125 ppi) LCD (TFT/TFD) |
? |
1080 x 1920 pixels (~367 ppi) LCD (TFT/TFD) |
| Display Refresh | ? | 60 Hz | ? | 60 Hz |
| Battery | 860 mAh | 2,000 mAh | 500 mAh | 3,400 mAh |
| Processor | ? | Qualcomm 215 | ? | 1.5 GHz Qualcomm Snapdragon 617 (MSM8952) |
| RAM | ? | ? | ? | 2 GB |
| Storage | ? raw hardware | 8 GB | ? raw hardware | 32 GB |
| Main Camera | - | 5 megapixel | - | 13 megapixel |
| Wide Camera | - | - | - | - |
| Tele Camera | - | - | - | - |
| Video Capture | - | VGA (640 x 480) | - | 1080p HD |
| Front Camera | - | - | - | 5 megapixel |
| Weight |
2.9 oz (82g) |
5.22 oz (148g) |
3.14 oz (89g) |
6.17 oz (175g) |
| Dimensions |
4.25" x 1.8" x 0.53" (108 x 46 x 13.5 mm) |
4.52" x 2.4" x 0.8" (115 x 61 x 20.3 mm) |
3.9" x 2" x 0.6" (99 x 51 x 15.2 mm) |
6.5" x 3.3" x 0.35" (165 x 84 x 8.9 mm) |
| Form Factor | Slab | Clamshell | Flip | Slab |
| Platform / OS | (proprietary) | (proprietary) | (proprietary) | Android |
| Network Bands |
GSM: 850, 1900 |
4G LTE: 2, 4, 5, 12, 66 WCDMA: 2, 4, 5 |
GSM: 900, 1900 |
4G LTE: 2, 4, 12 WCDMA: 2, 4, 5 GSM: 850, 900, 1800, 1900 |
| Data Technology | - | LTE (Cat 4) | - | LTE (Cat 4) |
| Features | ||||
| Barometer | - | Yes | - | - |
| Fingerprint Reader | - | - | - | Yes |
| Flashlight | Yes | Yes | - | Yes |
| GPS / Location | - | Yes | - | n/a |
| Accessibility | ||||
| Adjustable Text Size | - | Yes | - | n/a |
| Hearing Aid Compatible | - | Yes | - | Yes |
| Multiple Languages | - | Yes | - | n/a |
| TTY/TDD (Digital) | - | Yes | - | Yes |
| Alerts | ||||
| Extra Display | - | Yes | - | - |
| Ringer Profiles | Yes | - | Yes | - |
| Connectivity | ||||
| Bluetooth |
- |
Yes Classic Audio |
- |
Yes Classic Audio |
| Mobile Hotspot | - | - | - | n/a |
| USB | - |
Yes USB Type C |
- |
Yes USB Type C |
| Wi-Fi | - |
Yes 4 (802.11 b,g,n) |
- |
Yes 4 (802.11 b,g,n) |
| Contacts | ||||
| Picture ID | - | Yes | - | n/a |
| Ringer ID | - | Yes | - | n/a |
| Voice Dialing | - | Yes | Yes | n/a |
| Customization | ||||
| Custom Graphics | - | Yes | - | n/a |
| Custom Ringtones | - | Yes | Yes | n/a |
| Real-Music Ringers | - | Yes | - | n/a |
| Data & Network | ||||
| Data Tethering | - | - | Yes | n/a |
| WAP / Web Browser | - | Yes | - | n/a |
| Input | ||||
| Predictive Text Entry | Yes | Yes | - | n/a |
| Side Keys | - | Yes | Yes | Yes |
| Touch Screen | - | - | - | Yes |
| Memory | ||||
| Memory Card Slot | - | Yes | - | Yes |
| Messaging | ||||
| Email Client | - | Yes | - | n/a |
| Instant Messaging | - | - | - | n/a |
| MMS | - | Yes | - | n/a |
| Text Messaging Templates | - | - | - | n/a |
| Music | ||||
| FM Radio | Yes | Yes | - | Yes |
| Headphone Jack (3.5mm) | - | Yes | - | Yes |
| Music Player | - | Yes | - | n/a |
| Photo & Video | ||||
| Miracast | - | - | - | Yes |
| Productivity | ||||
| Alarm | Yes | Yes | Yes | n/a |
| Calculator | Yes | Yes | Yes | n/a |
| Calendar | Yes | Yes | - | n/a |
| Voice Memo | Yes | Yes | - | n/a |
| Software | ||||
| Games | Yes | - | Yes | n/a |
| Voice | ||||
| HD Voice | - | Yes | - | Yes |
| Headset Jack (2.5 mm) | Yes | - | - | n/a |
| Speaker Phone | Yes | Yes | - | Yes |
| Nokia 1661 | Iris Flip | Ericsson T28 World | ZTE ZMAX Pro | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Nokia 1661 | Iris Flip | Ericsson T28 World | ZTE ZMAX Pro |
