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| Phone | ZTE Z331 | Samsung Galaxy S21 | Samsung Axle R311 | BlackBerry 7280 | Samsung SGH-X640 |
| Current U.S. Carriers | (none) | Verizon | (none) | (none) | (none) |
| Global Availability | Released | Released | Released | Released | Released |
| Specifications | |||||
|---|---|---|---|---|---|
| Display Size |
2.4" diag. 4 : 3 |
6.2" diag. 20 : 9 |
1.9" diag. 4 : 3 |
? | ? |
| Display Resolution & Type |
176 x 220 pixels (~117 ppi) LCD (TFT/TFD) |
1080 x 2400 pixels (~424 ppi) AMOLED |
176 x 220 pixels (~148 ppi) LCD (TFT/TFD) |
240 x 160 pixels LCD (Color) |
128 x 160 pixels LCD (TFT/TFD) |
| Display Refresh | ? | 120 Hz | ? | ? | ? |
| Battery | 950 mAh | 4,000 mAh | ? | ? | 800 mAh |
| Processor | ? | 2.8 GHz Qualcomm Snapdragon 888 | ? | ? | ? |
| RAM | ? | 8 GB | ? | ? | ? |
| Storage | ? raw hardware | 128 GB * | ? raw hardware | ? raw hardware | ? raw hardware |
| Main Camera | 3 megapixel | 12 megapixel | Yes | - | Yes |
| Wide Camera | - | 12 megapixel | - | - | - |
| Tele Camera | - | 64 megapixel | - | - | - |
| Video Capture | QCIF (176 x 144) | 8K | - | - | - |
| Front Camera | - | 10 megapixel | - | - | - |
| Weight |
4 oz (113g) |
6.03 oz (171g) |
3.37 oz (96g) |
4.9 oz (139g) |
3 oz (85g) |
| Dimensions |
3.84" x 2.02" x 0.69" (98 x 51 x 17.5 mm) |
5.97" x 2.8" x 0.31" (152 x 71 x 7.9 mm) |
3.54" x 1.77" x 0.77" (90 x 45 x 19.6 mm) |
4.4" x 2.9" x 0.94" (112 x 74 x 23.9 mm) |
3.43" x 1.81" x 0.91" (87 x 46 x 23.1 mm) |
| Form Factor | Clamshell | Slab | Clamshell | Slab | Clamshell |
| Platform / OS | (proprietary) | Android | (proprietary) | BlackBerry OS | (proprietary) |
| Network Bands |
WCDMA: 1, 2, 5 GSM: 850, 900, 1800, 1900 |
5G: 2, 5, 12, 25, 30, 41, 66, 71, 77-C, 260, 261 4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 29, 30, 38, 39, 40, 41, 46, 48, 66, 71 WCDMA: 1, 2, 4, 5, 8 CDMA: 800, 850, 1900 GSM: 850, 900, 1800, 1900 |
CDMA: 850, 1900 |
GSM: 850, 1800, 1900 |
GSM: 900, 1800, 1900 |
| Data Technology | HSDPA 3.6 | NR (5G) | 1xRTT | GPRS | GPRS |
| Features | |||||
| Barometer | - | Yes | - | - | - |
| Fingerprint Reader | - |
Yes in-display (ultrasonic) |
- | - | - |
| Flashlight | - | Yes | - | - | - |
| GPS / Location | Yes | n/a | Yes | n/a | - |
| Water-Resistant | - |
Yes IPX8 (SCUBA) |
- | - | - |
| Accessibility | |||||
| Hearing Aid Compatible |
Yes M3, T4 (very tele-coil compatible) |
Yes M3, T3 (mostly tele-coil compatible) |
Yes M4 (very compatible) |
- | - |
| Multiple Languages | Yes | n/a | Yes | n/a | Yes |
| TTY/TDD (Digital) | Yes | Yes | Yes | - | - |
| Alerts | |||||
| Extra Display | Yes | - | Yes | - | - |
| Ringer Profiles | Yes | - | - | - | - |
| Connectivity | |||||
| Bluetooth | Yes | Yes | Yes | - | - |
| NFC | - | Yes | - | - | - |
| USB |
Yes Micro-USB |
Yes USB Type C |
- | Yes | - |
| Wi-Fi | - |
Yes 6 (802.11 a,ac,ax,b,g,n) |
- | - | - |
| Contacts | |||||
| Picture ID | Yes | n/a | Yes | n/a | Yes |
| Ringer ID | Yes | n/a | Yes | n/a | Yes |
| Voice Dialing | - | n/a | Yes | n/a | - |
| Customization | |||||
| Custom Graphics | Yes | n/a | Yes | n/a | Yes |
| Custom Ringtones | Yes | n/a | Yes | n/a | Yes |
| Real-Music Ringers | Yes | n/a | Yes | n/a | - |
| Data & Network | |||||
| Data Tethering | Yes | n/a | Yes | n/a | - |
| WAP / Web Browser | Yes | n/a | Yes | n/a | Yes |
| Input | |||||
| Predictive Text Entry | Yes | n/a | Yes | n/a | Yes |
| Side Keys | Yes | Yes | Yes | Yes | Yes |
| Text Keyboard, Hardware | - | - | - | Yes | - |
| Touch Screen | - |
Yes Capacitive |
- | - | - |
| Memory | |||||
| Memory Card Slot | Yes | - | - | - | - |
| Messaging | |||||
| Email Client | Yes | n/a | - | n/a | - |
| EMS / Picture Messaging | - | n/a | - | n/a | Yes |
| Instant Messaging | Yes | n/a | - | n/a | - |
| MMS | Yes | n/a | Yes | n/a | Yes |
| Text Messaging Templates | Yes | n/a | Yes | n/a | Yes |
| Music | |||||
| Music Player | Yes | n/a | - | n/a | - |
| Stereo Speakers | - | Yes | - | - | - |
| Photo & Video | |||||
| TV Output | - | Yes | - | - | - |
| Power | |||||
| Fast Charging | - | Yes | - | - | - |
| Wireless Charging | - | Yes | - | - | - |
| Productivity | |||||
| Alarm | Yes | n/a | Yes | n/a | Yes |
| Calculator | Yes | n/a | Yes | n/a | Yes |
| Calendar | Yes | n/a | Yes | n/a | Yes |
| To-Do List | - | n/a | - | n/a | Yes |
| Voice Memo | Yes | n/a | Yes | n/a | Yes |
| Software | |||||
| BREW | - | n/a | Yes | n/a | - |
| Games | Yes | n/a | Yes | n/a | Yes |
| Java (J2ME) | Yes | n/a | - | n/a | Yes |
| Voice | |||||
| HD Voice | - | Yes | - | - | - |
| Headset Jack (2.5 mm) | - | n/a | - | n/a | Yes |
| Speaker Phone | Yes | Yes | Yes | - | Yes |
| ZTE Z331 | Samsung Galaxy S21 | Samsung Axle R311 | BlackBerry 7280 | Samsung SGH-X640 | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | ZTE Z331 | Samsung Galaxy S21 | Samsung Axle R311 | BlackBerry 7280 | Samsung SGH-X640 |
