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| Phone | ZTE Z331 | Samsung SGH-T159 / Denim | Asus ROG Phone II | ZTE Blade Z Max | 
| Current U.S. Carriers | (none) | (none) | (none) | (none) | 
| Global Availability | Released | Released | Not yet released | Released | 
| Specifications | ||||
|---|---|---|---|---|
| Display Size | 
			2.4" diag. 4 : 3  | 
		
		
			1.8" diag. 4 : 3  | 
		
		
			6.6" diag. 19.5 : 9  | 
		
		
			6" 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 2340 pixels (~391 ppi) AMOLED  | 
		
		
			1080 x 1920 pixels (~367 ppi) LCD (TFT/TFD)  | 
	
| Display Refresh | ? | ? | 120 Hz | 60 Hz | 
| Battery | 950 mAh | 800 mAh | 6,000 mAh | 4,080 mAh | 
| Processor | ? | 468 MHz ST Ericsson DA6809-L | 3 GHz Qualcomm Snapdragon 855 Plus | 1.4 GHz Qualcomm Snapdragon 435 (MSM8940) | 
| RAM | ? | 128 MB | 12 GB | 2 GB | 
| Storage | ? raw hardware | 256 MB | 512 GB | 32 GB | 
| Main Camera | 3 megapixel | 1 megapixel | 48 megapixel | 16 megapixel | 
| Wide Camera | - | - | 13 megapixel | - | 
| Tele Camera | - | - | - | - | 
| Video Capture | QCIF (176 x 144) | QVGA (320 x 240) | 4K UHD | 1080p HD | 
| Front Camera | - | - | 24 megapixel | 8 megapixel | 
| Weight | 
			4 oz (113g)  | 
		
		
			2.9 oz (82g)  | 
		
		
			8.47 oz (240g)  | 
		
		
			6.58 oz (186g)  | 
	
| Dimensions | 
			3.84" x 2.02" x 0.69" (98 x 51 x 17.5 mm)  | 
		
		
			3.8" x 1.9" x 0.6" (97 x 48 x 15.2 mm)  | 
		
		
			6.73" x 3.06" x 0.37" (171 x 78 x 9.5 mm)  | 
		
		
			6.51" x 3.28" x 0.33" (165 x 83 x 8.3 mm)  | 
	
| Form Factor | Clamshell | Clamshell | Slab | Slab | 
| Platform / OS | (proprietary) | (proprietary) | Android | Android | 
| Network Bands | 
			 WCDMA: 1, 2, 5 GSM: 850, 900, 1800, 1900  | 
		
		
			 4G LTE: 1, 2, 3, 4, 5, 7, 8, 12, 13, 18, 19, 20, 26, 28, 29, 32, 34, 38, 39, 40, 41, 46, 66 WCDMA: 1, 2, 3, 4, 5, 8, 19 GSM: 850, 900, 1800, 1900  | 
		
		
			 4G LTE: 2, 4, 5, 12, 66 WCDMA: 2, 4, 5 GSM: 850, 900, 1800, 1900  | 
	|
| Data Technology | HSDPA 3.6 | HSPA 7.2 | LTE (Cat 20) | LTE (Cat 6) | 
| Features | ||||
| Fingerprint Reader | - | - | 
			Yes in-display (optical)  | 
		
		
			Yes stand-alone  | 
	
| Flashlight | - | - | Yes | Yes | 
| GPS / Location | Yes | - | n/a | n/a | 
| Accessibility | ||||
| Adjustable Text Size | - | Yes | 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 Classic Audio  | 
		
		
			Yes Classic Audio  | 
		
		
			Yes Classic Audio  | 
		
		
			Yes Classic Audio  | 
	
| NFC | - | - | Yes | - | 
| USB | 
			Yes Micro-USB  | 
		
		
			Yes Micro-USB  | 
		
		
			Yes USB Type C  | 
		
		
			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 | Yes | 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 | 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 | 
| Messaging | ||||
| Email Client | Yes | - | n/a | n/a | 
| Instant Messaging | 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 | Yes | 
| Headphone Jack (3.5mm) | - | - | Yes | Yes | 
| Music Player | Yes | Yes | n/a | n/a | 
| Stereo Speakers | - | - | Yes | - | 
| Photo & Video | ||||
| TV Output | - | - | Yes | - | 
| Power | ||||
| Fast Charging | - | - | Yes | Yes | 
| Productivity | ||||
| Alarm | Yes | Yes | n/a | n/a | 
| Calculator | Yes | Yes | n/a | n/a | 
| Calendar | Yes | Yes | n/a | n/a | 
| To-Do List | - | 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 | 
| Speaker Phone | Yes | Yes | Yes | Yes | 
| * Some versions only | ||||
| ZTE Z331 | Samsung SGH-T159 / Denim | Asus ROG Phone II | ZTE Blade Z Max | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | ZTE Z331 | Samsung SGH-T159 / Denim | Asus ROG Phone II | ZTE Blade Z Max | 










