Sony Xperia U (ST25a) vs Asus Padfone 2 (16GB)

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Side by side comparison between Sony Xperia U vs Asus Padfone 2 phones, differences, pros, cons and full specifications. What's the better?

10/22/2012 8:38 AM, updated: 11/10/2021 4:36 PM

Compare Asus Padfone 2 X Sony Xperia U (ST25a) 03Points

Specifications Compare Models Pictures

3.5"
LED

480x854

5
MP

0.3mp

512MB
RAM

Dual-core

1320
mAh

(Removable)

20Points Asus Padfone 2 (16GB) Compare Sony Xperia U X

Specifications Compare Models Pictures

4.7"
IPS+

720x1280

13
MP

1.2mp

2GB
RAM

Quad-core

2140
mAh

(Non removable)

What's the better phone? Asus Padfone 2 (16GB)

The phonemore's choice is much more technical than personal. Therefore, you shouldn't only consider this. Our goal is to help you, but what's important to us may not be important to you. You decide which one is the best! Comment!

3 Advantages Sony Xperia U (ST25a)	vs	20 Advantages Asus Padfone 2 (16GB)
+110 grams (3.85 ounces)23% Lighter	vs	135 grams (4.73 ounces)
+Li-Ion: lithium-ion (Removable)Advantage Removable battery can be replaced easily	vs	LiPo: li-ion polymer (Non removable)
+FM (RDS)Advantage The radio lets you listen to your songs and sports in general	vs	Not supported
1GHz 32bit Dual-core (45nm)	vs	+1.5GHz 32bit Quad-core (28nm)102% More powerful processor, you can open your applications faster
512MB LPDDR2	vs	+2GB LPDDR23 times More RAM memory. Typically more responsive and better for multitasking.
8GB (4GB available)	vs	+16GB3 times More internal storage for applications and files
12 millimeters (0.47 inches)	vs	+9 millimeters (0.35 inches)33% Thinner
TFT LED-Backlit LCD	vs	+TFT Super IPS+Advantage TFT Super IPS+ display is brighter and more vivid
480x854 pixels	vs	+720x1280 pixels125% Higher resolution screen
280 PPI	vs	+312 PPI11% Crisper display of text, images and videos because it has more pixels per inch (ppi)
3.5"	vs	+4.7"34% Larger screen
(back) 5MP	vs	+(back) 13MP158% Higher resolution main camera
(front) 0.3MP	vs	+(front) 1.2MP3 times Higher resolution secondary camera to take pictures and selfies
HD (1280x720)	vs	+Full HD (1920x1080)125% More image quality for recording videos with the primary camera
(front) VGA (640x480)	vs	+(front) HD (1280x720)2 times More image quality for recording videos with the secondary camera
3G HSUPA	vs	+4G LTEAdvantage The 4G LTE network is newer and faster
(3G HSUPA) 14.4 Mbps	vs	+(4G LTE) 100 Mbps6 times Faster for surfing the internet and download files
Not supported	vs	+GyroscopeAdvantage Sensors help you use the device
1320 mAh	vs	+2140 mAh62% Battery - higher amperage (mAh) allows more device usage time, but it also depends on the hardware and use
Not supported	vs	+Micro-B USB MHLAdvantage The TV-output lets you use your device on TV by cable
2.1 + A2DP	vs	+4.0 + A2DPAdvantage Bluetooth 4.0 + A2DP is newer and faster
Not supported	vs	+NFCAdvantage NFC allows you to make payments by approach quickly and securely
HTML, XHTML, Flash player	vs	+HTML, XHTML, HTML5, Flash playerAdvantage Better sites viewing on the internet

19 Common items in both devices

16 million

LED flash

Only digital zoom

Autofocus

Android 4.0.4 Ice Cream Sandwich ICS

Capacitive

Multitouch

+12 specs and more in the table below

Check the comparison table below for more items that are not evaluated in comparison score above.

Highlight differences

📱 Model features
	Sony Xperia U (ST25a)	Asus Padfone 2 (16GB)
Change model		Choose the model
Model	Xperia U (ST25a)	Padfone 2 (16GB)
Other model names	Sony Xperia U ST25, Sony Kumquat	Asus Padfone 2, Asus Pad Fone 2, Asus A68
Country or region available	(Latin America), Brazil, Canada, USA	feature not registered
Brand	Sony	Asus
Release date	5/7/2012	12/1/2012
Depth	12 millimeters (0.47 inches)	9 millimeters (0.35 inches)
Size (width x height)	54 x 112 millimeters (2.13 x 4.41 in)	68.9 x 137.9 millimeters (2.71 x 5.43 in)
Weight	110 grams (3.85 ounces)	135 grams (4.73 ounces)
Build, materials	Plastic body, glass front	feature not registered
Protection against water and others	Not supported	Not supported
📲 Display
	Sony Xperia U (ST25a)	Asus Padfone 2 (16GB)
Display type	TFT LED-Backlit LCD	TFT Super IPS+
Screen size	3.5" inches	4.7" inches
Screen-to-body ratio	~55.8% (screen-to-body ratio)	~64.1% (screen-to-body ratio)
Display resolution	480x854 pixels (16:9)	720x1280 pixels
Touchscreen	Capacitive Multitouch 4-points	Capacitive Multitouch
Pixel density (dot pitch)	280 PPI	312 PPI
Colors	16 million	16 million
Scratch-resistant glass	Scratch-resistant glass	Gorilla Glass
Refresh rate	60Hz	feature not registered
Display features	Not supported	feature not registered
🤖 Operating System
	Sony Xperia U (ST25a)	Asus Padfone 2 (16GB)
System version	Android 2.3.7 Gingerbread	Android 4.0.4 Ice Cream Sandwich ICS
Firmware update	Android 4.0.4 Ice Cream Sandwich ICS	feature not registered
User Interface	feature not registered	feature not registered
⚙️ Processor
	Sony Xperia U (ST25a)	Asus Padfone 2 (16GB)
Chipset	32bit: ST-Ericsson NovaThor U8500 (45nm)	32bit: Qualcomm Snapdragon S4 Pro (APQ8064) (28nm)
CPU	Dual-core, 1 processor: 2x 1GHz ARM Cortex-A9 (Dual-core)	Quad-core, 1 processor: 4x 1.5GHz Krait 300 (Quad-core)
GPU graphical controller	ARM Mali-400 MP1	Qualcomm Adreno 320 (400MHz)
Performance (benchmark)	feature not registered	feature not registered
💽 Memory and storage
	Sony Xperia U (ST25a)	Asus Padfone 2 (16GB)
RAM memory	512MB LPDDR2	2GB LPDDR2
Internal storage	8GB (4GB available)	16GB
External storage	Not supported	Not supported
📶 Mobile networks
	Sony Xperia U (ST25a)	Asus Padfone 2 (16GB)
Dual-SIM	Not supported	Not supported
SIM card	1 slot (Single-SIM) Standard mini-SIM (2FF)	1 slot (Single-SIM) micro-SIM (3FF)
Maximum Download / Upload	14.4/5.76 Mbps	100/50 Mbps
Network technology	2G, 3G	2G
Frequency, bands	Expand band details Collapse details
GSM MHz band	Quad-Band 850/900/1800/1900	Quad-Band 850/900/1800/1900
Primary 2G network	GSM 850/900/1800/1900	GSM 850/900/1800/1900
Primary 3G network	UMTS 850/1900/2100	Not supported
Primary 4G network	Not supported	Not supported
Primary 5G network	Not supported	Not supported
Primary data network	GPRS, EDGE, UMTS, HSDPA, HSUPA	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, LTE
Secondary 2G network	Not supported	Not supported
Secondary 3G network	Not supported	Not supported
Secondary 4G network	Not supported	Not supported
Secondary data network	Not supported	Not supported
📷 Camera
	Sony Xperia U (ST25a)	Asus Padfone 2 (16GB)
Back camera (main camera)	5 megapixels	13 megapixels
Main camera resolution	2592x1944 pixels	4032x3224 pixels
Video recording (primary)	HD (1280x720) 30 fps	Full HD (1920x1080) 30 fps
Flash	LED flash	LED flash
Focal aperture	feature not registered	feature not registered
Focal length	feature not registered	feature not registered
Sensor size	feature not registered	feature not registered
Pixel size	feature not registered	feature not registered
Autofocus	Autofocus	Autofocus
Touch focus	Supported	feature not registered
Image stabilization	EIS: Digital stabilization	feature not registered
Zoom	Only digital zoom	Only digital zoom
Face/smile detection	Face detection, Smile detection	Face detection
BSI sensor	Not supported	feature not registered
HDR	Not supported	feature not registered
Camera extras	feature not registered	feature not registered
📸 Front camera
	Sony Xperia U (ST25a)	Asus Padfone 2 (16GB)
Front camera (secondary)	0.3 megapixels	1.2 megapixels
Front camera resolution	640x480 pixels	1280x960 pixels
Video recording (secondary)	VGA (640x480)	HD (1280x720)
Front flash	Not supported	Not supported
Focal aperture	feature not registered	feature not registered
Focal length	feature not registered	feature not registered
Sensor size	feature not registered	feature not registered
Pixel size	feature not registered	feature not registered
🔉 Sound and multimedia
	Sony Xperia U (ST25a)	Asus Padfone 2 (16GB)
Loudspeaker	Supported	Supported
Active noise cancellation	2 microphones or more	feature not registered
Radio	FM (RDS)	Not supported
TV	Not supported	Not supported
Video formats	MP4, H.263, H.264, WMV	MP4, H.264, H.263
Audio formats	MP3, eAAC+, WMA, WAV	MP3, WAV, eAAC+
🔌 Connectivity
	Sony Xperia U (ST25a)	Asus Padfone 2 (16GB)
USB	MicroUSB 2.0, USB OTG On-The-Go	USB 2.0 proprietary connector
Audio output	3.5mm jack	3.5mm jack
TV output	Not supported	Micro-B USB MHL
Bluetooth	2.1 + A2DP	4.0 + A2DP
WiFi	802.11 b/g/n [wifi4] (2.4GHz)	802.11 a/b/g/n [wifi4] (2.4GHz, 5GHz)
DLNA	Supported	feature not registered
GPS	A-GPS, GeoTagging	A-GPS, GeoTagging
NFC	Not supported	Supported
Infrared port	Not supported	feature not registered
🧭 Sensors
	Sony Xperia U (ST25a)	Asus Padfone 2 (16GB)
Sensors	Accelerometer Ambient light sensor Compass Proximity sensor	Accelerometer Ambient light sensor Compass Gyroscope Proximity sensor
Vibrating alert	Supported	Supported
🔋 Battery
	Sony Xperia U (ST25a)	Asus Padfone 2 (16GB)
Battery type	Li-Ion: lithium-ion (Removable) BA600	LiPo: li-ion polymer (Non removable)
Battery capacity	1320 mAh	2140 mAh
Charger, watts	Wired charging	Wired charging
Inductive / wireless charging	Not supported	feature not registered
Talk time autonomy	5.6 hours	16 hours
Standby	472 hours (19.7 days)	352 hours (14.7 days)
➕ Other features
	Sony Xperia U (ST25a)	Asus Padfone 2 (16GB)
Call control	Voice dialing, Voice recorder, Voice commands	Voice dialing, Voice recorder
Messaging	SMS (T9), MMS, E-mail, Push mail	SMS (Swype), MMS, E-mail, Push mail
Hands-free calling	Supported	Supported
Video calling	Supported	Supported
Ringtones	Polyphonic and customized	Polyphonic and customized
Web browser	HTML, XHTML, Flash player	HTML, XHTML, HTML5, Flash player
Antenna	Internal antenna	Internal antenna
Qwerty physical keyboard	Not supported	Not supported
Miscellaneous	• Colors: Black, White • Exchangeable bottom caps: White, Black, Pink, Yellow • Sony Reality Display • Sony Mobile BRAVIA Engine • xLoud • 3D surround sound • WiFi hotspot Java framework	• Colors: Black, White • ASUS SonicMaster sound • ASUS Waveshare UI • HDMI 1.4a • Wi-Fi dual-band • Wi-Fi hotspot • Optional: Padfone Station with 10.1 inches IPS display, 1280x800 pixels, 5000 mAh battery, 514g Java framework
☢️ Radiation rate
	Sony Xperia U (ST25a)	Asus Padfone 2 (16GB)
SAR 1.6W/kg (USA, Mexico, etc.)	1.09W/kg (head), 0.93W/kg (body)	feature not registered
SAR 2W/kg (Europe, UK, etc.)	1.62W/kg (head)	feature not registered