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| Phone | Samsung Galaxy A21 | Samsung Renown U810 | AT&T Calypso |
| Current U.S. Carriers | (none) | (none) | (none) |
| Global Availability | Released | Released | Released |
| Specifications | |||
|---|---|---|---|
| Display Size |
6.5" diag. 20 : 9 |
2.3" diag. 4 : 3 |
5.5" diag. 18 : 9 |
| Display Resolution & Type |
720 x 1600 pixels (~270 ppi) LCD (TFT/TFD) |
240 x 320 pixels (~174 ppi) LCD (TFT/TFD) |
480 x 960 pixels (~195 ppi) LCD (TFT/TFD) |
| Display Refresh | 60 Hz | ? | 60 Hz |
| Battery | 4,000 mAh | 800 mAh | 2,500 mAh |
| Processor | 2 GHz MediaTek Helio P35 (MT6765) | ? | 1.5 GHz MediaTek MT6739 |
| RAM | 3 GB | ? | 1 GB |
| Storage | 32 GB | ? raw hardware | 16 GB |
| Main Camera | 16 megapixel | 2 megapixel | 5 megapixel |
| Wide Camera | 8 megapixel | - | - |
| Tele Camera | - | - | - |
| Video Capture | 1080p HD | QVGA (320 x 240) | 1080p HD |
| Front Camera | 13 megapixel | - | 5 megapixel |
| Weight |
6.81 oz (193g) |
4.05 oz (115g) |
6 oz (170g) |
| Dimensions |
6.61" x 3.02" x 0.32" (168 x 77 x 8.1 mm) |
3.87" x 1.95" x 0.69" (98 x 50 x 17.5 mm) |
5.91" x 2.87" x 0.39" (150 x 73 x 9.9 mm) |
| Form Factor | Slab | Clamshell | Slab |
| Platform / OS | Android | (proprietary) | Android |
| Network Bands |
4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 20, 25, 26, 28, 38, 39, 40, 41, 66, 71 WCDMA: 1, 2, 4, 5, 8 CDMA: 800, 850, 1900 GSM: 850, 900, 1800, 1900 |
CDMA: 850, 1900 GSM: 850, 900, 1800, 1900 |
4G LTE: 2, 4, 5, 12, 14, 30 WCDMA: 2, 4, 5 GSM: 850, 900, 1800, 1900 |
| Data Technology | LTE (Cat 6) | EVDO r0 | LTE (Cat 4) |
| Features | |||
| Fingerprint Reader |
Yes stand-alone |
- | - |
| Flashlight | Yes | - | Yes |
| GPS / Location | n/a | Yes | n/a |
| Accessibility | |||
| Adjustable Text Size | n/a | Yes | n/a |
| Hearing Aid Compatible |
Yes M4, T3 (mostly tele-coil compatible) |
Yes M3, T4 (very tele-coil compatible) |
Yes M3, T4 (very tele-coil compatible) |
| Multiple Languages | n/a | Yes | n/a |
| TTY/TDD (Digital) | Yes | Yes | Yes |
| Alerts | |||
| Extra Display | - | Yes | - |
| Connectivity | |||
| Bluetooth | Yes | Yes | Yes |
| NFC | Yes | - | - |
| USB |
Yes USB Type C |
Yes |
Yes USB Type C |
| Wi-Fi |
Yes 5 (802.11 a,ac,b,g,n) |
- |
Yes 4 (802.11 b,g,n) |
| Contacts | |||
| Picture ID | n/a | Yes | n/a |
| Ringer ID | n/a | Yes | n/a |
| Voice Dialing | n/a | Yes | n/a |
| Customization | |||
| Custom Graphics | n/a | Yes | n/a |
| Custom Ringtones | n/a | Yes | n/a |
| Data & Network | |||
| Data Tethering | n/a | Yes | n/a |
| WAP / Web Browser | n/a | Yes | n/a |
| Input | |||
| Predictive Text Entry | n/a | Yes | n/a |
| Side Keys | Yes | Yes | Yes |
| Touch Screen |
Yes Capacitive |
- |
Yes Capacitive |
| Memory | |||
| Memory Card Slot | Yes | Yes | Yes |
| Messaging | |||
| Email Client | n/a | Yes | n/a |
| EMS / Picture Messaging | n/a | Yes | n/a |
| Instant Messaging | n/a | Yes | n/a |
| MMS | n/a | Yes | n/a |
| Text Messaging Templates | n/a | Yes | n/a |
| Music | |||
| Headphone Jack (3.5mm) | Yes | - | Yes |
| Music Player | n/a | Yes | n/a |
| Power | |||
| Fast Charging | Yes | - | - |
| Productivity | |||
| Alarm | n/a | Yes | n/a |
| Calculator | n/a | Yes | n/a |
| Calendar | n/a | Yes | n/a |
| Software | |||
| BREW | n/a | Yes | n/a |
| Games | n/a | Yes | n/a |
| Voice | |||
| HD Voice | Yes | - | Yes |
| Headset Jack (2.5 mm) | n/a | Yes | n/a |
| Speaker Phone | Yes | Yes | Yes |
| Samsung Galaxy A21 | Samsung Renown U810 | AT&T Calypso | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Samsung Galaxy A21 | Samsung Renown U810 | AT&T Calypso |
