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| Phone | Ericsson T39 | Samsung M520 | BLU G90 Pro | ZTE Z331 |
| Current U.S. Carriers | (none) | (none) | (none) | (none) |
| Global Availability | Released | Released | Released | Released |
| Specifications | ||||
|---|---|---|---|---|
| Display Size | ? |
2.1" diag. 4 : 3 |
6.5" diag. 19.5 : 9 |
2.4" diag. 4 : 3 |
| Display Resolution & Type |
? LCD (Grayscale) |
176 x 220 pixels (~134 ppi) LCD (TFT/TFD) |
1080 x 2340 pixels (~396 ppi) LCD (TFT/TFD) |
176 x 220 pixels (~117 ppi) LCD (TFT/TFD) |
| Display Refresh | ? | ? | 60 Hz | ? |
| Battery | ? | ? | 5,000 mAh | 950 mAh |
| Processor | ? | ? | 2 GHz MediaTek Helio G90T | ? |
| RAM | ? | ? | 4 GB | ? |
| Storage | ? raw hardware | ? raw hardware | 128 GB | ? raw hardware |
| Main Camera | - | 1 megapixel | 48 megapixel | 3 megapixel |
| Wide Camera | - | - | 8 megapixel | - |
| Tele Camera | - | - | - | - |
| Video Capture | - | ? | 4K UHD | QCIF (176 x 144) |
| Front Camera | - | - | 32 megapixel | - |
| Weight |
3.03 oz (86g) |
2.75 oz (78g) |
7.58 oz (215g) |
4 oz (113g) |
| Dimensions |
3.78" x 1.97" x 0.71" (96 x 50 x 18 mm) |
4.01" x 2.04" x 0.5" (102 x 52 x 12.7 mm) |
6.38" x 3.03" x 0.4" (162 x 77 x 10.2 mm) |
3.84" x 2.02" x 0.69" (98 x 51 x 17.5 mm) |
| Form Factor | Flip | Slide | Slab | Clamshell |
| Platform / OS | (proprietary) | (proprietary) | Android | (proprietary) |
| Network Bands |
GSM: 900, 1800, 1900 |
CDMA: 850, 1900 |
4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 28 WCDMA: 1, 2, 4, 5, 8 GSM: 850, 900, 1800, 1900 |
WCDMA: 1, 2, 5 GSM: 850, 900, 1800, 1900 |
| Data Technology | GPRS | EVDO r0 | LTE (Cat 6) | HSDPA 3.6 |
| Features | ||||
| Fingerprint Reader | - | - |
Yes stand-alone |
- |
| Flashlight | - | - | Yes | - |
| GPS / Location | - | Yes | n/a | Yes |
| Accessibility | ||||
| Hearing Aid Compatible | - | Yes | - | Yes |
| Multiple Languages | Yes | Yes | n/a | Yes |
| TTY/TDD (Digital) | - | Yes | Yes | Yes |
| Alerts | ||||
| Extra Display | - | - | - | Yes |
| Ringer Profiles | Yes | - | - | Yes |
| Connectivity | ||||
| Bluetooth |
Yes HSP, DUN, OPP, Sync |
Yes Classic Audio |
Yes |
Yes Classic Audio |
| Infrared (IR) | Yes | - | - | - |
| USB | - | Yes |
Yes USB Type C |
Yes Micro-USB |
| Wi-Fi | - | - |
Yes 4 (802.11 a,b,g,n) |
- |
| Contacts | ||||
| Picture ID | - | Yes | n/a | Yes |
| Ringer ID | - | Yes | n/a | Yes |
| Voice Dialing | Yes | Yes | n/a | - |
| Customization | ||||
| Custom Graphics | Yes | Yes | n/a | Yes |
| Custom Ringtones | Yes | Yes | n/a | Yes |
| Real-Music Ringers | - | - | n/a | Yes |
| Data & Network | ||||
| Data Tethering | Yes | Yes | n/a | Yes |
| Dual-SIM | - | - | Yes | - |
| WAP / Web Browser | Yes | Yes | n/a | Yes |
| Input | ||||
| Predictive Text Entry | Yes | Yes | n/a | Yes |
| Side Keys | Yes | Yes | Yes | Yes |
| Touch Screen | - | - | Yes | - |
| Memory | ||||
| Memory Card Slot | - | Yes | Yes | Yes |
| Messaging | ||||
| Email Client | - | - | n/a | Yes |
| Instant Messaging | - | - | n/a | Yes |
| MMS | - | - | n/a | Yes |
| Text Messaging Templates | Yes | Yes | n/a | Yes |
| Music | ||||
| FM Radio | - | - | Yes | - |
| Headphone Jack (3.5mm) | - | - | Yes | - |
| Music Player | - | Yes | n/a | Yes |
| Power | ||||
| Fast Charging | - | - | Yes | - |
| Wireless Charging | - | - | Yes | - |
| Productivity | ||||
| Alarm | Yes | Yes | n/a | Yes |
| Calculator | Yes | Yes | n/a | Yes |
| Calendar | Yes | Yes | n/a | Yes |
| To-Do List | - | Yes | n/a | - |
| Voice Memo | Yes | Yes | n/a | Yes |
| Software | ||||
| Games | Yes | Yes | n/a | Yes |
| Java (J2ME) | - | Yes | n/a | Yes |
| Voice | ||||
| Speaker Phone | - | Yes | Yes | Yes |
| Ericsson T39 | Samsung M520 | BLU G90 Pro | ZTE Z331 | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Ericsson T39 | Samsung M520 | BLU G90 Pro | ZTE Z331 |
