Compare Phones
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| Phone | Samsung SGH-X640 | Ericsson R520 | ZTE Agent | ZTE Blade Max 3 / Max Blue | LG K8 (2017) |
| Current U.S. Carriers | (none) | (none) | (none) | (none) | (none) |
| Global Availability | Released | Released | Released | Released | Released |
| Specifications | |||||
|---|---|---|---|---|---|
| Display Size | ? | ? |
2.4" diag. 4 : 3 |
6" diag. 16 : 9 |
5" diag. 16 : 9 |
| Display Resolution & Type |
128 x 160 pixels LCD (TFT/TFD) |
? |
240 x 320 pixels (~167 ppi) LCD (TFT/TFD) |
1080 x 1920 pixels (~367 ppi) LCD (TFT/TFD) |
720 x 1280 pixels (~294 ppi) LCD (TFT/TFD) |
| Display Refresh | ? | ? | ? | 60 Hz | 60 Hz |
| Battery | 800 mAh | ? | 900 mAh | 4,000 mAh | 2,500 mAh |
| Processor | ? | ? | ? | 2 GHz Qualcomm Snapdragon 625 (MSM8953) | 1.4 GHz Qualcomm Snapdragon 425 (MSM8917) |
| RAM | ? | ? | ? | 2 GB | 1.5 GB |
| Storage | ? raw hardware | ? raw hardware | ? raw hardware | 16 GB | 16 GB |
| Main Camera | Yes | - | 1 megapixel | 13 megapixel | 8 megapixel |
| Wide Camera | - | - | - | - | - |
| Tele Camera | - | - | - | - | - |
| Video Capture | - | - | ? | 4K UHD | 1080p HD |
| Front Camera | - | - | - | 5 megapixel | 5 megapixel |
| Weight |
3 oz (85g) |
4.23 oz (120g) |
3.53 oz (100g) |
6.34 oz (180g) |
5 oz (142g) |
| Dimensions |
3.43" x 1.81" x 0.91" (87 x 46 x 23.1 mm) |
5.12" x 1.97" x 0.63" (130 x 50 x 16 mm) |
4.3" x 1.9" x 0.6" (109 x 48 x 15.2 mm) |
6.49" x 3.3" x 0.35" (165 x 84 x 8.9 mm) |
5.7" x 2.83" x 0.31" (145 x 72 x 7.9 mm) |
| Form Factor | Clamshell | Slab | Slab | Slab | Slab |
| Platform / OS | (proprietary) | (proprietary) | (proprietary) | Android | Android |
| Network Bands |
GSM: 900, 1800, 1900 |
GSM: 900, 1800, 1900 |
CDMA: 850, 1700, 1900 |
4G LTE: 2, 4, 5, 12, 13, 25 WCDMA: 2, 4, 5 CDMA: 850, 1900 GSM: 850, 900, 1800, 1900 |
4G LTE: 2, 4, 5, 12, 25 CDMA: 850, 1900 |
| Data Technology | GPRS | GPRS | 1xRTT | LTE (Cat 4) | LTE (Cat 4) |
| Features | |||||
| Fingerprint Reader | - | - | - |
Yes stand-alone |
- |
| Flashlight | - | - | - | Yes | Yes |
| GPS / Location | - | - | Yes | n/a | n/a |
| Accessibility | |||||
| Hearing Aid Compatible | - | - |
Yes M4, T4 (very tele-coil compatible) |
Yes M4, T3 (mostly tele-coil compatible) |
Yes M4, T4 (very tele-coil compatible) |
| Multiple Languages | Yes | Yes | Yes | n/a | n/a |
| TTY/TDD (Digital) | - | - | Yes | Yes | Yes |
| Alerts | |||||
| Ringer Profiles | - | Yes | - | - | - |
| Connectivity | |||||
| Bluetooth | - | Yes | Yes | Yes | Yes |
| Infrared (IR) | - | Yes | - | - | - |
| USB | - | - |
Yes Micro-USB |
Yes USB Type C |
Yes Micro-USB |
| Wi-Fi | - | - | - |
Yes 5 (802.11 ac,b,g,n) |
Yes 4 (802.11 b,g,n) |
| Contacts | |||||
| Picture ID | Yes | - | - | n/a | n/a |
| Ringer ID | Yes | - | Yes | n/a | n/a |
| Voice Dialing | - | Yes | - | n/a | n/a |
| Customization | |||||
| Custom Graphics | Yes | - | Yes | n/a | n/a |
| Custom Ringtones | Yes | Yes | Yes | n/a | n/a |
| Real-Music Ringers | - | - | Yes | n/a | n/a |
| Data & Network | |||||
| Data Tethering | - | Yes | - | n/a | n/a |
| WAP / Web Browser | Yes | Yes | Yes | n/a | n/a |
| Input | |||||
| Predictive Text Entry | Yes | Yes | Yes | n/a | n/a |
| Side Keys | Yes | Yes | Yes | Yes | Yes |
| Touch Screen | - | - | - |
Yes Capacitive |
Yes Capacitive |
| Memory | |||||
| Memory Card Slot | - | - | Yes | Yes | Yes |
| Messaging | |||||
| Email Client | - | - | Yes | n/a | n/a |
| EMS / Picture Messaging | Yes | - | - | n/a | n/a |
| Instant Messaging | - | - | Yes | n/a | n/a |
| MMS | Yes | - | Yes | n/a | n/a |
| Text Messaging Templates | Yes | Yes | Yes | n/a | n/a |
| Music | |||||
| FM Radio | - | - | - | - | Yes |
| Headphone Jack (3.5mm) | - | - | Yes | Yes | Yes |
| Music Player | - | - | Yes | n/a | n/a |
| Power | |||||
| Fast Charging | - | - | - | Yes | - |
| Productivity | |||||
| Alarm | Yes | Yes | Yes | n/a | n/a |
| Calculator | Yes | Yes | Yes | n/a | n/a |
| Calendar | Yes | Yes | Yes | n/a | n/a |
| To-Do List | Yes | - | - | n/a | n/a |
| Voice Memo | Yes | Yes | Yes | n/a | n/a |
| Software | |||||
| BREW | - | - | Yes | n/a | n/a |
| Games | Yes | Yes | Yes | n/a | n/a |
| Java (J2ME) | Yes | - | - | n/a | n/a |
| Voice | |||||
| Headset Jack (2.5 mm) | Yes | - | - | n/a | n/a |
| Speaker Phone | Yes | Yes | Yes | Yes | Yes |
| Samsung SGH-X640 | Ericsson R520 | ZTE Agent | ZTE Blade Max 3 / Max Blue | LG K8 (2017) | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Samsung SGH-X640 | Ericsson R520 | ZTE Agent | ZTE Blade Max 3 / Max Blue | LG K8 (2017) |
