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| Phone | Samsung Galaxy A51 (4G) | ZTE Concord II | ZTE Z431 / Altair |
| Current U.S. Carriers | (none) | (none) | (none) |
| Global Availability | Released | Released | Released |
| Specifications | |||
|---|---|---|---|
| Display Size |
6.5" diag. 20 : 9 |
4" diag. 5 : 3 |
2.4" diag. 4 : 3 |
| Display Resolution & Type |
1080 x 2400 pixels (~405 ppi) AMOLED |
480 x 800 pixels (~233 ppi) LCD (TFT/TFD) |
320 x 240 pixels (~167 ppi) LCD (TFT/TFD) |
| Display Refresh | 60 Hz | 60 Hz | ? |
| Battery | 4,000 mAh | 1,820 mAh | 1,000 mAh |
| Processor | 2.3 GHz Samsung Exynos 9611 | 1.2 GHz Qualcomm MSM8210 | ? |
| RAM | 4 GB | 1 GB | ? |
| Storage | 128 GB | 4 GB | ? raw hardware |
| Main Camera | 48 megapixel | 5 megapixel | 2 megapixel |
| Wide Camera | 12 megapixel | - | - |
| Tele Camera | - | - | - |
| Video Capture | 4K UHD | 720p HD | QVGA (320 x 240) |
| Front Camera | 32 megapixel | - | - |
| Weight |
6.07 oz (172g) |
4.4 oz (125g) |
3.52 oz (100g) |
| Dimensions |
6.24" x 2.89" x 0.31" (158 x 73 x 7.9 mm) |
4.96" x 2.56" x 0.42" (126 x 65 x 10.7 mm) |
4.49" x 2.39" x 0.41" (114 x 61 x 10.4 mm) |
| Form Factor | Slab | Slab | Slab |
| Platform / OS | Android | Android | (proprietary) |
| Network Bands |
4G LTE: 2, 3, 4, 5, 7, 12, 13, 14, 20, 25, 26, 28, 30, 41, 66, 71 WCDMA: 1, 2, 4, 5, 8 CDMA: 800, 850, 1900 GSM: 850, 900, 1800, 1900 |
WCDMA: 2, 4, 5 GSM: 850, 900, 1800, 1900 |
WCDMA: 1, 2, 5 GSM: 850, 900, 1800, 1900 |
| Data Technology | LTE (Cat 12) | HSPA+ 21 | ? |
| Features | |||
| Fingerprint Reader |
Yes in-display (optical) |
- | - |
| Flashlight | Yes | - | - |
| GPS / Location | n/a | n/a | Yes |
| Accessibility | |||
| Adjustable Text Size | n/a | n/a | - |
| Hearing Aid Compatible |
Yes M3, T3 (mostly tele-coil compatible) |
Yes M3, T4 (very tele-coil compatible) |
Yes M3, T3 (mostly tele-coil compatible) |
| Multiple Languages | n/a | n/a | Yes |
| TTY/TDD (Digital) | Yes | Yes | Yes |
| Alerts | |||
| Ringer Profiles | - | - | Yes |
| Connectivity | |||
| Bluetooth | Yes | Yes | Yes |
| MirrorLink | Yes | - | - |
| Mobile Hotspot | n/a | n/a | - |
| NFC | Yes | - | - |
| USB |
Yes USB Type C |
Yes Micro-USB |
Yes Micro-USB |
| Wi-Fi |
Yes 5 (802.11 a,ac,b,g,n) |
Yes 4 (802.11 b,g,n) |
- |
| Contacts | |||
| Picture ID | n/a | n/a | Yes |
| Ringer ID | n/a | n/a | Yes |
| Voice Dialing | n/a | n/a | - |
| Customization | |||
| Custom Graphics | n/a | n/a | Yes |
| Custom Ringtones | n/a | n/a | Yes |
| Real-Music Ringers | n/a | n/a | Yes |
| Data & Network | |||
| Data Tethering | n/a | n/a | Yes |
| WAP / Web Browser | n/a | n/a | Yes |
| Input | |||
| Predictive Text Entry | n/a | n/a | Yes |
| Side Keys | Yes | Yes | Yes |
| Text Keyboard, Hardware | - | - | Yes |
| Touch Screen |
Yes Capacitive |
Yes Capacitive |
- |
| Memory | |||
| Memory Card Slot | Yes | Yes | Yes |
| Messaging | |||
| Email Client | n/a | n/a | Yes |
| Instant Messaging | n/a | n/a | - |
| MMS | n/a | n/a | Yes |
| Text Messaging Templates | n/a | n/a | Yes |
| Music | |||
| Headphone Jack (3.5mm) | Yes | Yes | Yes |
| Music Player | n/a | n/a | Yes |
| Power | |||
| Fast Charging | Yes | - | - |
| Productivity | |||
| Alarm | n/a | n/a | Yes |
| Calculator | n/a | n/a | Yes |
| Calendar | n/a | n/a | Yes |
| Voice Memo | n/a | n/a | Yes |
| Software | |||
| BREW | n/a | n/a | Yes |
| Games | n/a | n/a | Yes |
| Voice | |||
| HD Voice | Yes | Yes | - |
| Speaker Phone | Yes | Yes | Yes |
| Samsung Galaxy A51 (4G) | ZTE Concord II | ZTE Z431 / Altair | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Samsung Galaxy A51 (4G) | ZTE Concord II | ZTE Z431 / Altair |
