Review Index:

Samsung Galaxy S II Android Smartphone Review

Subject: Mobile
Manufacturer: Samsung

Introduction, Specs, Design and Ergonomics


View Full Size

Courtesy of Samsung


Samsung's Galaxy S II smartphone debuted in the U.S. with Sprint, AT&T, and T-Mobile in September and we finally got our hands on a review sample. The Samsung smartphone runs on Android 2.3 "Gingerbread" operating system and includes an 8 MP camera with LED flash and 1080p video, front facing 2 MP camera, and Samsung’s custom TouchWiz user interface.


View Full Size

Courtesy of Samsung


T-Mobile and Sprint’s version sports a 4.52-inch display, but AT&T’s version has a 4.3-inch screen that matches the original international version of the Galaxy S II. We are reviewing T-Mobile's Galaxy S II with 16GB of internal memory (there are two options for 16 and 32 GB). The Sprint and AT&T versions are outfitted with a dual-core 1.2 GHz Orion processor, but the T-Mobile version we are reviewing today sports a Qualcomm Snapdragon S3 1.5 GHz dual-core CPU.

Read the rest of our review of the Samsung Galaxy S II!


Technical Specifications (taken from T-Mobile's support website)

Manufacturer Samsung Electronics
Compatible networks Dual band CDMA2000/EV-DO Rev. A 800 and 1900 MHz;
WiMAX 2.5 to 2.7 GHz;
802.16e 2.5G(GSM/GPRS/EDGE): 850, 900, 1800, and 1900 MHz
UMTS: 850, 900, 1700 (T-Mobile USA only), 1900, and 2100 MHz
HSPA+: 21/42 Mbit/s; HSUPA: 5.76 Mbit/s
Predecessor Samsung Galaxy S
Type Touchscreen smartphone
Dimensions 0.37 x 5.11 x 2.71
Weight 4.77 oz
Operating system Android 2.3.5 (Gingerbread) with TouchWiz UI 4.0
CPU Qualcomm Snapdragon S3 Processor with 1.5 GHz dual-core CPUs
Memory 1 GB RAM
Storage 16/32 GB flash memory
Removable storage microSD (up to 32 GB)
Battery Li-ion 1850 mAh
Data inputs Multi-touch touch screen, headset controls, proximity andambient light sensors, 3-axisgyroscope, magnetometer, accelerometer, GPS, and stereo FM-radio
Display 800×480 px, 4.57 in. at 218 ppi WVGA Super AMOLED Plus (0.37 megapixels)
Rear camera 8 Mpx Back-illuminated sensor with auto focus, 1080p 30 fps full HD video recording, and stills. Single LED flash.
Front camera 2 Mpx for video chatting, video recording (VGA), and stills
Connectivity 3.5 mm TRRS; Wi-Fi(802.11a/b/g/n); Wi-Fi Direct;Bluetooth 3.0; micro USB 2.0;Near field communication(NFC); DLNA; MHL; HDMI;USB Host (OTG) 2.0
Other Exchange ActiveSync, integrated messaging Social HubReaders HubMusic Hub, and Game Hub


Design and Ergonomics

View Full Size

Our first look at the Galaxy S II out of its retail packaging was a mix of emotions. While I liked the size of the display and the layout of the volume controls, power button, and USB port, the quality of the materials used on this device felt a bit flimsy and cheap for my taste. I've been using a T-Mobile G2 smartphone for more than a year now, and it is built like an indestructable tank compared to the Galaxy S II. The thin dimensions are quite impressive at 9.4 millimeters, but the overall feel of the phone didn't give me any confidence that it could survive minor drops or other accidents during normal everyday use.


View Full Size

I took the plastic film off the front of the device that outlines all the user controls and took a hard look at the top of the phone itself. Samsung included a 2 MP camera for video chatting with friends and family and to take the occassional profile pic for your Facebook page. This front-facing camera is actually an improvement from the standard 1.3 MP cameras that were being bundled with many smartphones the past couple of years.


View Full Size

The quick navigation buttons at the bottom of the Galaxy S II have been streamlined and backlit with white LEDs. There are only four buttons to search, go back, open menus, and access the main home page on the smartphone. These buttons are very functional and Samsung left out a multi-function toggle button that is common used with many Android-based smartphones on the market today.


View Full Size

The bottom of the smartphone includes the USB port that also works as an HDMI out port if you purchase an optional HDTV adapter. I would have preferred a separate mini HDMI port because I occassionally like to view my photos and videos from my phone on my 55" LED TV at home. 


View Full Size

The right side of the Galaxy S II only has one power button that matches the grey finish of the unit.Nothing else too spectacular to note here.


View Full Size

The top of the phone has one 3.5mm headphone jack and a mic that I assume is used for video conferencing with the front-facing camera.


View Full Size

The left side of the Galaxy S II has a basic volume rocker that matches the gun-metal grey exterior that surrounds the sides of the smartphone. 


View Full Size

The back of the case has a textured grey plastic cover that feels extremely thin and light. A bit too thin for my taste too. It also features an 8 MP camera with a bright LED flash. The camera also shoots 1080p video at 30 frames per second. The phone itself supports a variety of video codecs including MPEG4, H.264, H.263, VC-1, XviD, WMV7/8, VP8, MP43– Format: 3GP (MP4), WMV (ASF), AVI, and DivX.


View Full Size

I took off the plastic back plate to get a look at the Galaxy S II's internal storage options. This smartphone supports mini SD cards up to 32GBs, which would give users plenty of options for storing high-definition videos and large photos. It's also great for other applications and games that will take users past their 16 or 32GBs of internal memory that's bundled with this phone. 

October 27, 2011 | 04:02 PM - Posted by Anonymous (not verified)

While the back cover may appear flimsy, it's pretty high grade plastic. Here's a youtube clip of it being being bent to the extreme and not breaking.

October 28, 2011 | 12:57 PM - Posted by Steve Grever

I agree that it is a higher-grade plastic, but my personal preference is to have something more durable. Thanks for sharing the link to give our readers more information about this product too.

October 27, 2011 | 08:19 PM - Posted by Corhen (not verified)

playing with one of these at the local mall, i was really impressed by the screen, and how thin it was....

That said, i think i might wait for the first Kal-El smartphones to ship, by all benchmarks that's going to be a punishingly good core.

October 27, 2011 | 09:51 PM - Posted by Chaitanya Shukla (not verified)

battery has 1850mah of power not a850mah, please correct that typo.

October 28, 2011 | 12:56 PM - Posted by Steve Grever

I corrected the error. Thanks.

October 28, 2011 | 11:32 AM - Posted by maxius4 (not verified)

ryan you should do a review of the MOTOROLA PHOTON 4G i was going to get a Galaxy SII till i saw what that phone is capable of

October 28, 2011 | 11:33 AM - Posted by mAxius

ryan great job in reviewing this phone could you do a review of the MOTOROLA PHOTON 4G for tmobile?

October 28, 2011 | 01:00 PM - Posted by Steve Grever

I'll look into it, but we currently don't have The Photon 4G on our review schedule.

October 28, 2011 | 02:23 PM - Posted by klatch

Come on maximus: The article shows at the top that Steve is the author. Give him the love. Ryan gets enough love as it is. =)

November 12, 2011 | 02:42 AM - Posted by Tim Verry


October 29, 2011 | 09:38 AM - Posted by Anonymous (not verified)

Looks so different to my version of the S2. But then I am in England and we have had this better than the I-phone Mobile for months.

January 17, 2012 | 04:14 AM - Posted by Mobile Zone (not verified)

Nice phone with good features.Love to use it Mobile Zone

May 21, 2012 | 09:29 PM - Posted by BP Choi (not verified)

I would like to business development contact email address.
We are smartphone accesoories comapny in Korea.

Post new comment

The content of this field is kept private and will not be shown publicly.
  • Lines and paragraphs break automatically.
  • Allowed HTML tags: <a> <em> <strong> <cite> <code> <ul> <ol> <li> <dl> <dt> <dd> <blockquote><p><br>
  • Web page addresses and e-mail addresses turn into links automatically.

More information about formatting options

By submitting this form, you accept the Mollom privacy policy.