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| Phone | Samsung SGH-X640 | ZTE Blade Z Max | Samsung SGH-A157 | Motorola Moto z4 |
| Current U.S. Carriers | (none) | (none) | (none) | (none) |
| Global Availability | Released | Released | Released | Released |
| Specifications | ||||
|---|---|---|---|---|
| Display Size | ? |
6" diag. 16 : 9 |
1.8" diag. 4 : 3 |
6.4" diag. 19.5 : 9 |
| Display Resolution & Type |
128 x 160 pixels LCD (TFT/TFD) |
1080 x 1920 pixels (~367 ppi) LCD (TFT/TFD) |
128 x 160 pixels (~116 ppi) LCD (TFT/TFD) |
1080 x 2340 pixels (~403 ppi) AMOLED |
| Display Refresh | ? | 60 Hz | ? | 60 Hz |
| Battery | 800 mAh | 4,080 mAh | 800 mAh | 3,600 mAh |
| Processor | ? | 1.4 GHz Qualcomm Snapdragon 435 (MSM8940) | ? | 2 GHz Qualcomm Snapdragon 675 |
| RAM | ? | 2 GB | ? | 4 GB |
| Storage | ? raw hardware | 32 GB | 256 MB | 128 GB |
| Main Camera | Yes | 16 megapixel | - | 48 megapixel |
| Wide Camera | - | - | - | - |
| Tele Camera | - | - | - | - |
| Video Capture | - | 1080p HD | - | 4K UHD |
| Front Camera | - | 8 megapixel | - | 25 megapixel |
| Weight |
3 oz (85g) |
6.58 oz (186g) |
2.99 oz (85g) |
6 oz (170g) |
| Dimensions |
3.43" x 1.81" x 0.91" (87 x 46 x 23.1 mm) |
6.51" x 3.28" x 0.33" (165 x 83 x 8.3 mm) |
3.83" x 1.84" x 0.65" (97 x 47 x 16.5 mm) |
6.22" x 2.96" x 0.29" (158 x 75 x 7.4 mm) |
| Form Factor | Clamshell | Slab | Clamshell | Slab |
| Platform / OS | (proprietary) | Android | (proprietary) | Android |
| Network Bands |
GSM: 900, 1800, 1900 |
4G LTE: 2, 4, 5, 12, 66 WCDMA: 2, 4, 5 GSM: 850, 900, 1800, 1900 |
WCDMA: 2, 5 GSM: 850, 900, 1800, 1900 |
4G LTE: 2, 3, 4, 5, 7, 12, 13, 20, 25, 26, 28, 29, 30, 38, 41, 66, 71 WCDMA: 1, 2, 4, 5, 8 CDMA: 800, 850, 1900 GSM: 850, 900, 1800, 1900 |
| Data Technology | GPRS | LTE (Cat 6) | ? | LTE (Cat 12) |
| Features | ||||
| Fingerprint Reader | - |
Yes stand-alone |
- | Yes |
| Flashlight | - | Yes | - | Yes |
| GPS / Location | - | n/a | Yes | n/a |
| Water-Resistant | - | - | - | Yes |
| Accessibility | ||||
| Adjustable Text Size | - | n/a | Yes | n/a |
| Hearing Aid Compatible | - | Yes | Yes | Yes |
| Multiple Languages | Yes | n/a | Yes | n/a |
| TTY/TDD (Digital) | - | Yes | Yes | Yes |
| Alerts | ||||
| Ringer Profiles | - | - | Yes | - |
| Connectivity | ||||
| Bluetooth |
- |
Yes Classic Audio |
- |
Yes Classic Audio |
| NFC | - | - | - | Yes |
| USB | - |
Yes USB Type C |
Yes Micro-USB |
Yes USB Type C |
| Wi-Fi | - |
Yes 4 (802.11 b,g,n) |
- |
Yes 5 (802.11 a,ac,b,g,n) |
| Contacts | ||||
| Picture ID | Yes | n/a | Yes | n/a |
| Ringer ID | Yes | n/a | Yes | n/a |
| Customization | ||||
| Custom Graphics | Yes | n/a | Yes | n/a |
| Custom Ringtones | Yes | n/a | Yes | n/a |
| Real-Music Ringers | - | n/a | Yes | n/a |
| Data & Network | ||||
| WAP / Web Browser | Yes | n/a | Yes | n/a |
| Input | ||||
| Predictive Text Entry | Yes | n/a | Yes | n/a |
| Side Keys | Yes | Yes | - | Yes |
| Touch Screen | - | Yes | - | Yes |
| Memory | ||||
| Memory Card Slot | - | Yes | - | Yes |
| Messaging | ||||
| EMS / Picture Messaging | Yes | n/a | - | n/a |
| MMS | Yes | n/a | Yes | n/a |
| Text Messaging Templates | Yes | n/a | Yes | n/a |
| Music | ||||
| FM Radio | - | Yes | - | Yes |
| Headphone Jack (3.5mm) | - | Yes | - | Yes |
| Power | ||||
| Fast Charging | - | Yes | - | Yes |
| Productivity | ||||
| Alarm | Yes | n/a | Yes | n/a |
| Calculator | Yes | n/a | Yes | n/a |
| Calendar | Yes | n/a | Yes | n/a |
| To-Do List | Yes | n/a | Yes | n/a |
| Voice Memo | Yes | n/a | Yes | n/a |
| Software | ||||
| Games | Yes | n/a | - | n/a |
| Java (J2ME) | Yes | n/a | - | n/a |
| Voice | ||||
| HD Voice | - | Yes | - | Yes |
| Headset Jack (2.5 mm) | Yes | n/a | - | n/a |
| Speaker Phone | Yes | Yes | Yes | Yes |
| Samsung SGH-X640 | ZTE Blade Z Max | Samsung SGH-A157 | Motorola Moto z4 | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Samsung SGH-X640 | ZTE Blade Z Max | Samsung SGH-A157 | Motorola Moto z4 |
