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| Phone | ZTE Z331 | Alcatel 665 | Samsung Galaxy S21 | Alcatel Idol 4S |
| Current U.S. Carriers | (none) | (none) | Verizon | (none) |
| Global Availability | Released | Released | Released | Not yet released |
| Specifications | ||||
|---|---|---|---|---|
| Display Size |
2.4" diag. 4 : 3 |
1.8" diag. 4 : 3 |
6.2" diag. 20 : 9 |
5.5" diag. 16 : 9 |
| Display Resolution & Type |
176 x 220 pixels (~117 ppi) LCD (TFT/TFD) |
128 x 160 pixels (~116 ppi) LCD (TFT/TFD) |
1080 x 2400 pixels (~424 ppi) AMOLED |
1440 x 2560 pixels (~534 ppi) AMOLED |
| Display Refresh | ? | ? | 120 Hz | 60 Hz |
| Battery | 950 mAh | 650 mAh | 4,000 mAh | 3,000 mAh |
| Processor | ? | ? | 2.8 GHz Qualcomm Snapdragon 888 | 1.8 GHz Qualcomm Snapdragon 652 (MSM8976) |
| RAM | ? | 16 MB | 8 GB | 3 GB |
| Storage | ? raw hardware | 32 MB | 128 GB * | 32 GB |
| Main Camera | 3 megapixel | 2 megapixel | 12 megapixel | 16 megapixel |
| Wide Camera | - | - | 12 megapixel | - |
| Tele Camera | - | - | 64 megapixel | - |
| Video Capture | QCIF (176 x 144) | QCIF (176 x 144) | 8K | 4K UHD |
| Front Camera | - | - | 10 megapixel | 8 megapixel |
| Weight |
4 oz (113g) |
2.72 oz (77g) |
6.03 oz (171g) |
5.26 oz (149g) |
| Dimensions |
3.84" x 2.02" x 0.69" (98 x 51 x 17.5 mm) |
3.78" x 1.89" x 0.66" (96 x 48 x 16.8 mm) |
5.97" x 2.8" x 0.31" (152 x 71 x 7.9 mm) |
6.06" x 2.97" x 0.28" (154 x 75 x 7 mm) |
| Form Factor | Clamshell | Clamshell | Slab | Slab |
| Platform / OS | (proprietary) | (proprietary) | Android | Android |
| Network Bands |
WCDMA: 1, 2, 5 GSM: 850, 900, 1800, 1900 |
GSM: 850, 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 |
4G LTE: 2, 4, 5, 7, 12, 17 WCDMA: 1, 2, 4, 5 GSM: 850, 900, 1800, 1900 |
| Data Technology | HSDPA 3.6 | - | NR (5G) | LTE (Cat 4) |
| Features | ||||
| Barometer | - | - | Yes | - |
| Fingerprint Reader | - | - |
Yes in-display (ultrasonic) |
Yes * |
| Flashlight | - | - | Yes | Yes |
| GPS / Location | Yes | - | n/a | n/a |
| Water-Resistant | - | - |
Yes IPX8 (SCUBA) |
- |
| Accessibility | ||||
| Adjustable Text Size | - | - | n/a | n/a |
| Hearing Aid Compatible | Yes | Yes | Yes | Yes |
| Multiple Languages | Yes | Yes | n/a | n/a |
| TTY/TDD (Digital) | Yes | - | Yes | Yes |
| Alerts | ||||
| Extra Display | Yes | Yes | - | - |
| Ringer Profiles | Yes | Yes | - | - |
| Connectivity | ||||
| Bluetooth | Yes | Yes | Yes | Yes |
| Mobile Hotspot | - | - | n/a | n/a |
| NFC | - | - | Yes | Yes |
| USB |
Yes Micro-USB |
Yes Micro-USB |
Yes USB Type C |
Yes Micro-USB |
| Wi-Fi | - | - |
Yes 6 (802.11 a,ac,ax,b,g,n) |
Yes 5 (802.11 a,ac,b,g,n) |
| Contacts | ||||
| Picture ID | Yes | Yes | n/a | n/a |
| Ringer ID | Yes | Yes | n/a | n/a |
| Voice Dialing | - | - | n/a | n/a |
| Customization | ||||
| Custom Graphics | Yes | Yes | n/a | n/a |
| Custom Ringtones | Yes | Yes | n/a | n/a |
| Real-Music Ringers | Yes | Yes | n/a | n/a |
| Data & Network | ||||
| Data Tethering | Yes | - | n/a | n/a |
| Dual-SIM | - | - | - | Yes * |
| WAP / Web Browser | Yes | Yes | n/a | n/a |
| Input | ||||
| Predictive Text Entry | Yes | Yes | n/a | n/a |
| Side Keys | Yes | Yes | Yes | Yes |
| Touch Screen | - | - | Yes | Yes |
| Memory | ||||
| Memory Card Slot | Yes | Yes | - | Yes |
| Messaging | ||||
| Email Client | Yes | - | n/a | n/a |
| Instant Messaging | Yes | Yes | n/a | n/a |
| MMS | Yes | Yes | n/a | n/a |
| Text Messaging Templates | Yes | Yes | n/a | n/a |
| Music | ||||
| FM Radio | - | Yes | - | - |
| Headphone Jack (3.5mm) | - | Yes | - | Yes |
| Music Player | Yes | Yes | n/a | n/a |
| Stereo Speakers | - | - | Yes | Yes |
| Photo & Video | ||||
| Miracast | - | - | - | Yes |
| TV Output | - | - | Yes | - |
| Power | ||||
| Fast Charging | - | - | Yes | Yes |
| Wireless Charging | - | - | Yes | - |
| Productivity | ||||
| Alarm | Yes | Yes | n/a | n/a |
| Calculator | Yes | Yes | n/a | n/a |
| Calendar | Yes | Yes | n/a | n/a |
| Voice Memo | Yes | Yes | n/a | n/a |
| Software | ||||
| Games | Yes | Yes | n/a | n/a |
| Java (J2ME) | Yes | Yes | n/a | n/a |
| Voice | ||||
| HD Voice | - | - | Yes | Yes |
| Speaker Phone | Yes | Yes | Yes | Yes |
| * Some versions only | ||||
| ZTE Z331 | Alcatel 665 | Samsung Galaxy S21 | Alcatel Idol 4S | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | ZTE Z331 | Alcatel 665 | Samsung Galaxy S21 | Alcatel Idol 4S |
