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| Phone | Sony Ericsson Z550a | Siemens SX1 | Motorola Droid X | HTC EVO 4G LTE | Pantech Reveal C790 | 
| Current U.S. Carriers | (none) | (none) | (none) | (none) | (none) | 
| Global Availability | Released | Released | Released | Released | Released | 
| Specifications | |||||
|---|---|---|---|---|---|
| Display Size | 
			1.9" diag. 4 : 3  | 
		
		? | 
			4.3" diag. 16 : 9  | 
		
		
			4.7" diag. 16 : 9  | 
		
		
			2.2" diag. 4 : 3  | 
	
| Display Resolution & Type | 
			176 x 220 pixels (~148 ppi) LCD (TFT/TFD)  | 
		
		
			176 x 220 pixels LCD (TFT/TFD)  | 
		
		
			480 x 854 pixels (~228 ppi) LCD (TFT/TFD)  | 
		
		
			720 x 1280 pixels (~312 ppi) LCD (TFT/TFD)  | 
		
		
			320 x 240 pixels (~182 ppi) LCD (TFT/TFD)  | 
	
| Display Refresh | ? | ? | 60 Hz | 60 Hz | ? | 
| Battery | ? | 1,000 mAh | 1,540 mAh | 2,000 mAh | 930 mAh | 
| Processor | ? | ? | 1 GHz TI OMAP 3630 (ARM Cortex A8) | 1.5 GHz Qualcomm Snapdragon S4 | ? | 
| RAM | ? | ? | ? | 1 GB | ? | 
| Storage | ? raw hardware | ? raw hardware | 8 GB | 16 GB | ? raw hardware | 
| Main Camera | 1 megapixel | Yes | 8 megapixel | 8 megapixel | 1 megapixel | 
| Wide Camera | - | - | - | - | - | 
| Tele Camera | - | - | - | - | - | 
| Video Capture | ? | QCIF (176 x 144) | 720p HD | 1080p HD | QVGA (320 x 240) | 
| Front Camera | - | - | - | 1 megapixel | - | 
| Weight | 
			3.26 oz (92g)  | 
		
		
			4.09 oz (116g)  | 
		
		
			5.47 oz (155g)  | 
		
		
			5.05 oz (143g)  | 
		
		
			4.2 oz (119g)  | 
	
| Dimensions | 
			3.43" x 1.77" x 0.79" (87 x 45 x 20.1 mm)  | 
		
		
			4.29" x 2.2" x 0.75" (109 x 56 x 19.1 mm)  | 
		
		
			5" x 2.6" x 0.4" (127 x 66 x 10.2 mm)  | 
		
		
			5.3" x 2.7" x 0.35" (135 x 69 x 8.9 mm)  | 
		
		
			3.91" x 2.36" x 0.58" (99 x 60 x 14.8 mm)  | 
	
| Form Factor | Clamshell | Slab | Slab | Slab | Slab | 
| Platform / OS | (proprietary) | S60 (Symbian) | Android | Android | (proprietary) | 
| Network Bands | 
			 GSM: 850, 900, 1800, 1900  | 
		
		
			 GSM: 900, 1800, 1900  | 
		
		
			 CDMA: 850, 1900  | 
		
		
			 4G LTE: 25 CDMA: 800, 850, 1900  | 
		
		
			 WCDMA: 1, 2, 5 GSM: 850, 900, 1800, 1900  | 
	
| Data Technology | GPRS | GPRS | EVDO rA | LTE (Cat 3) | HSDPA 3.6 | 
| Features | |||||
| GPS / Location | - | n/a | n/a | n/a | Yes | 
| Accessibility | |||||
| Adjustable Text Size | - | n/a | n/a | n/a | Yes | 
| Hearing Aid Compatible | - | - | Yes | Yes | Yes | 
| Multiple Languages | Yes | n/a | n/a | n/a | Yes | 
| TTY/TDD (Digital) | Yes | - | Yes | Yes | Yes | 
| Alerts | |||||
| Extra Display | Yes | - | - | - | - | 
| Ringer Profiles | Yes | Yes | - | - | Yes | 
| Connectivity | |||||
| Bluetooth | Yes | 
			Yes Classic Audio  | 
		
		
			Yes Classic Audio  | 
		
		
			Yes Classic Audio  | 
		
		
			Yes Classic Audio  | 
	
| Infrared (IR) | - | Yes | - | - | - | 
| Mobile Hotspot | - | n/a | n/a | n/a | - | 
| NFC | - | - | - | Yes | - | 
| USB | Yes | Yes | Yes | 
			Yes Micro-USB  | 
		
		Yes | 
| Wi-Fi | - | - | Yes | 
			Yes 4 (802.11 a,b,g,n)  | 
		
		- | 
| Contacts | |||||
| Picture ID | Yes | n/a | n/a | n/a | Yes | 
| Ringer ID | Yes | n/a | n/a | n/a | Yes | 
| Voice Dialing | Yes | n/a | n/a | n/a | - | 
| Customization | |||||
| Custom Graphics | Yes | n/a | n/a | n/a | Yes | 
| Custom Ringtones | Yes | n/a | n/a | n/a | Yes | 
| Real-Music Ringers | Yes | n/a | n/a | n/a | Yes | 
| Data & Network | |||||
| Data Tethering | Yes | n/a | n/a | n/a | Yes | 
| WAP / Web Browser | Yes | n/a | n/a | n/a | Yes | 
| Input | |||||
| Predictive Text Entry | Yes | n/a | n/a | n/a | Yes | 
| Side Keys | Yes | Yes | Yes | Yes | Yes | 
| Text Keyboard, Hardware | - | - | - | - | Yes | 
| Touch Screen | - | - | Yes | Yes | - | 
| Memory | |||||
| Memory Card Slot | Yes | Yes | Yes | Yes | Yes | 
| Messaging | |||||
| Email Client | Yes | n/a | n/a | n/a | Yes | 
| Instant Messaging | - | n/a | n/a | n/a | Yes | 
| MMS | Yes | n/a | n/a | n/a | Yes | 
| Text Messaging Templates | Yes | n/a | n/a | n/a | Yes | 
| Music | |||||
| FM Radio | Yes | Yes | Yes | - | - | 
| Headphone Jack (3.5mm) | - | - | Yes | Yes | - | 
| Music Player | Yes | n/a | n/a | n/a | Yes | 
| Photo & Video | |||||
| DLNA | - | - | Yes | Yes | - | 
| TV Output | - | - | Yes | - | - | 
| Productivity | |||||
| Alarm | Yes | n/a | n/a | n/a | Yes | 
| Calculator | Yes | n/a | n/a | n/a | Yes | 
| Calendar | Yes | n/a | n/a | n/a | Yes | 
| To-Do List | Yes | n/a | n/a | n/a | - | 
| Voice Memo | Yes | n/a | n/a | n/a | Yes | 
| Software | |||||
| Games | Yes | n/a | n/a | n/a | Yes | 
| Java (J2ME) | Yes | n/a | n/a | n/a | Yes | 
| Voice | |||||
| HD Voice | - | - | - | Yes | - | 
| Push-To-Talk | Yes * | - | - | - | - | 
| Speaker Phone | Yes | Yes | Yes | Yes | Yes | 
| * Some versions only | |||||
| Sony Ericsson Z550a | Siemens SX1 | Motorola Droid X | HTC EVO 4G LTE | Pantech Reveal C790 | |
NOTE: Differences are highlighted with bold / black text for visual clarity only.
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| Phone | Sony Ericsson Z550a | Siemens SX1 | Motorola Droid X | HTC EVO 4G LTE | Pantech Reveal C790 | 











