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Samsung Galaxy S II 4G Android Phone (AT&T)

by Samsung
2.9 out of 5 stars 93 customer reviews
| 8 answered questions

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  • Display: 4.3-inches
  • Camera: 8-MP
  • Processor Speed: 1.2 GHz
  • OS: Android 2.3 (Gingerbread)
  • Release Date: October, 2011
3 used from $95.00

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Technical Details

  • Size (LWH): 5.11 inches, 2.71 inches, 0.37 inches
  • Weight: 4.8 ounces
  • Network Compatibility: UMTS
  • Phone Book Capacity: 100 Entries
  • Minimum Rated Talk Time: 300 minutes
  • Minimum Rated Standby Time: 200 hours
  • Battery Type: Lithium Ion
  See more technical details

Product Description

Product Description

The Samsung Galaxy S II is the follow-up to Samsung's popular Galaxy S Captivate. This sequel upgrades to a faster 1.2 GHz dual-core processor, a larger 4.3-inch Super AMOLED Plus display, a 8 megapixel camera, and better HD video capture and output. This high-end Android smartphone also features DLNA streaming, 16GB of built-in memory, fast HSPA data, multi-format music player, WiFi, HTML browser, video streaming, touchscreen, and GPS navigation. This quadband GSM smartphone is also equipped with WCDMA modes for international use, and offers access to thousands of apps, games, movies, and music available on Google's Play Store.

Offering a powerful, premium Android smartphone experience in a pocket-friendly design, the ultra-thin Samsung Galaxy S II 4G for AT&T gives you extreme multitasking abilities and the smoothest game play possible thanks to its powerful dual-core 1.2 GHz processor. Measuring a mere 8.89mm (0.35 inches) at its thinnest from front to back, the Galaxy S II easily it slips in and out of your pocket even with its huge 4.3-inch Super AMOLED Plus multi-touch display. It's perfect for immersing yourself in cinema-quality video and intense on-the-go gaming.

Boasting a vibrant 4.3-inch Super AMOLED Plus display (view larger).

8-megapixel camera with Full HD 1080p video recording.

Comfortable in your hand at just over 4 ounces.
Samsung Galaxy S II 4G
At a Glance:

  • 3G/4G connectivity

  • Android 2.3 OS

  • 1.2 GHz dual-core processor

  • 4.3-inch touchscreen

  • 16 GB memory

  • 8-MP camera + Full HD 1080p video capture

  • GPS navigation

  • Wireless-N Wi-Fi

  • Bluetooth 3.0

  • Personal/corporate e-mail
At a Glance

With AT&T's 4G network, you'll enjoy mobile broadband speeds up to 4x faster than AT&T's already fast mobile broadband network (learn more below). You also get the AT&T Mobile Hotspot service built right into the smartphone--enabling you to connect additional Wi-Fi-enabled devices to the phone's mobile broadband signal (requires appropriate data plan). This GPS-enabled phone can also access the AT&T Navigator service for turn-by-turn directions.

Other features include an 8-megapixel camera with Full HD 1080p video capture, 16 GB internal memory, microSD memory expansion to 32 GB, Bluetooth 3.0 connectivity for hands-free devices and stereo music streaming, DLNA wireless streaming capabilities, GPS for navigation and location-based services, access to over 200,000 apps in the Android Market, and up to 3 hours of talk time (see full specifications below).

The Brightest, Most Colorful Screen

With an incredibly colorful 4.3-inch Super AMOLED Plus display, the Galaxy S II delivers 50 percent more sub-pixels than the previous generation display for better contrast. The display also offers unmatched outdoor viewing quality, even in the brightest sunlight.

Super Sharp Photos and Videos Plus Video Chat

This Galaxy S II also captures sharp photos with its 8-megapixel camera with flash, and it records videos in stunning Full HD 1080p resolution. An additional 2-megapixel front-facing camera gives you the power to connect with your friends and family face-to-face via video chat with preloaded Qik Lite over Wi-Fi. And with Google Talk, you can video chat with all of your Google Talk contacts, whether they are on a mobile phone or a computer.

Mobile Entertainment

Samsung's Media Hub enables you to rent or purchase movies and TV shows within seconds watch from the convenience of anywhere. With Media Hub's progressive downloading feature, you can start watching your content almost immediately as the rest of the file downloads to the Galaxy S II. Plus, all Media Hub content can be shared among five Media Hub-enabled devices on the same account.

Intuitive TouchWiz Interface

The Galaxy S II features Samsung's TouchWiz user interface, providing superior multi-tasking and customization for an enhanced visual and intuitive smartphone experience. Live Panel features provide immediate access to weather, social updates, e-mail, news and photos, which can all be customized on any one of the seven home screens. All of the widgets can be positioned and re-sized to create unique home screens and one-touch access to the services and apps you use the most. The Notifications Panel allows one touch access to a separate menu for managing Wi-Fi, Bluetooth, GPS, and Flight Mode settings.

Vital Statistics

The Samsung Galaxy S II 4G weighs 4.3 ounces and measures 4.96 x 2.6 x 0.35 inches. Its 1650 mAh lithium-ion battery is rated at up to 8 hours of talk time, and up to 400 hours (16.6 days) of standby time. It runs on the 850/900/1800/1900 MHz GSM/GPRS/EDGE frequencies as well as AT&T's dual-band 4G network (850/1900 MHz; HSPA+/HSDPA/UMTS) plus international 2100 MHz 3G networks.

What's in the Box

Samsung Galaxy S II 4G handset, rechargeable battery, charger, USB cable, quick start guide

AT&T 4G Network

This phone runs on AT&T's dual-band 850/1900 MHz 4G network (UMTS/HSDPA/HSPA+), and with HSPA+ you'll experience mobile data speeds up to 4x faster than ordinary mobile broadband--up to approximately 6 Mbps (download). AT&T has deployed HSPA+ to virtually 100 percent of its mobile broadband network, which enables 4G speeds when combined with enhanced backhaul (via Ethernet or fiber).

Backhaul is one of the major pieces of a telecommunications network. Think of it as the limbs connecting AT&T's cell towers with AT&T's backbone network that provides access to the Internet.

Coming later in 2011, AT&T will deliver a second layer of 4G network called LTE (Long Term Evolution) that is even faster than HSPA+ speeds.

In areas where either AT&T's 3G or 4G network is not available, you'll continue to receive service on the AT&T EDGE network, which offers availability in more than 13,000 US cities and along some 40,000 miles of major highways.

Note: AT&T's 4G mobile broadband coverage is not available in all areas. 4G speeds delivered by HSPA+ with enhanced backhaul; availability increasing with ongoing backhaul deployment.

Optional AT&T Services

AT&T Navigator: This premium GPS navigation application includes audible turn-by-turn directions, real-time traffic updates and re-routing options, and 3D moving maps (additional charges applicable). AT&T Navigator offers several other features to make your commute more enjoyable and reliable, including mobile access to You'll be able to find the closes ATM, restaurant, gas station, Wi-Fi hotspot and more with over 10 million business listings.

DataPro 4 GB for Smartphone Tethering: Tethering lets you use your smartphone as a wireless modem or mobile hotspot, enabling you to share your mobile broadband connection to laptops, netbooks, and more. The DataPro 4 GB plan also includes unlimited access to more than 26,000 AT&T Wi-Fi Hot Spots. And if you go over, you'll get an additional 1 GB automatically for only $10.

AT&T FamilyMap: Locate any phone indoors or outdoors on the AT&T Network. FamilyMap provides peace of mind by being able to conveniently locate a family member from your wireless phone or PC and know that your family's information is secure and private. Want to verify that your child arrives home from school each day? Set up a Schedule Check to automatically get location information sent to you via text message or e-mail.

Android Gingerbread Operating System

Android Gingerbread

The Galaxy S II runs the Android 2.3 operating system (dubbed Gingerbread)--the fastest version of Android available for smartphones yet. It features a cleaner, more refined interface with new icons, improved top notification bar, and more intuitive navigation.

Multitasking in Gingerbread allows you the ability to run more than one app at a time. If you're playing a game, you can easily switch to an incoming e-mail and then switch back to the game without losing your place. And like the previous version of Android ("Froyo"), Gingerbread provides support for Adobe Flash Player 10.1 for access to the full Web.

A new onscreen keyboard makes it easier to type thanks to additional spacing between the keys and larger font sizes. And the more you use the keyboard, the easier typing will be as the enhanced suggest feature records previous input history to make better suggestions.

The Galaxy S II also brings one-touch access to the popular Google mobile services you use every day. It also provides easy access to both personal and corporate e-mail, calendars, and contacts supported by Exchange Server and Gmail. And through Android Market, you'll get access to thousands of useful applications, widgets, and fun games to download and install on your phone, with many more apps being added every day.

Google Integration
  • Android Market for browsing and downloading thousands of free and paid apps
  • Pre-loaded Android apps: Browser, Calculator, Calendar (Google or Corporate), Camera, Clock, Contacts, Email, Gallery, Messaging, Music, News & Weather, Phone, Settings, Video Player, Voice Dialer, Voice Search, YouTube
  • Google applications: Gmail, Google Search, Google Voice Search, Google Latitude, Google Maps, Google Places, Google Talk
  • Google Maps Navigation with spoken turn-by-turn directions showing real-time traffic and 360° views of the destination


  • Ultra-fast 4G connectivity via AT&T's HSPA+ network (with enhanced backhaul). Where 4G isn't available, your phone will connect with AT&T's 3G network.
  • Wireless-N Wi-Fi networking (802.11b/g/n) for accessing home and corporate networks as well as hotspots while on the go.
  • AT&T Mobile Hotspot capable enabling you to connect multiple devices--from tablets to gaming devices--to the phone's 3G/4G cellular connection via Wi-Fi.
  • Next-generation Bluetooth 3.0 connectivity backward compatible with older Bluetooth-enabled peripherals and includes stereo audio streaming.
  • Onboard GPS for navigation (using pre-loaded BlackBerry Maps or optional AT&T Navigator) and location services

Pre-installed Apps

  • Samsung Media Hub puts thousands of hit movies and next-day TV shows at your fingertips
  • Samsung Social Hub allows you to transfer e-mail, instant messaging, contacts, calendar, and social network connections--including Twitter, Facebook and LinkedIn accounts--into Feeds and Messages folders that can be either put into separate tabs or combined into comprehensive lists.
  • Vlingo Voice Talk allows you to give your Epic 4G Touch voice commands, including voice dial, text message, navigation, music, Web browsing and search.
  • Kies Air for wireless syncing
  • Qik Video Chat

Communications & Internet

  • Full messaging capabilities including SMS text, MMS picture/video and IM instant messaging
  • Full HTML browser (Webkit 5) with Flash 10.1 Support
  • Personal and corporate e-mail access with support for Exchange ActiveSync as well as personal e-mail accounts (Google push, Yahoo!, POP3, IMAP).


  • 1.2 GHz dual-core processor (Samsung Exynos) speeds up everything--from playing games to watching shows to opening files from work.
  • 4.3-inch Super AMOLED Plus multi-touch display (480 x 800 pixels, 16 million color depth)
  • HDMI port for video output to your HDTV or monitor (adapter and cable not included).
  • MicroUSB port
  • Sensors: accelerometer, 6-axis gyroscope.


  • 8-megapixel auto-focus camera with LED flash, smile detection, geo-tagging, zero shutter lag, and multiple scene modes.
  • HD 1080p video capture
  • 2-megapixel forward-facing camera for video chats and self portraits.


  • Music player compatible with MP3, WMA, AAC, FLAC, OGG, and WAV
  • Video player compatible with MP4, M4V, AVI, WMV, and 3GP.
  • Samsung AllShare DLNA capabilities allow you to stream movies, music, and photos from your smartphone to a compatible HDTV.


  • 16 GB internal memory
  • Memory expansion via microSD card slot with support for optional cards up to 32 GB.
  • 1024 MB of RAM

More Features

  • 3.5mm headphone jack
  • Hands-free speakerphone


Also Available for This Android Device

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Product Details

  • Product Dimensions: 5.1 x 2.7 x 0.4 inches ; 4.8 ounces
  • Shipping Weight: 12 ounces
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B005PT14FQ
  • Item model number: Samsung Galaxy S II (SGH-i777)
  • Average Customer Review: 2.9 out of 5 stars 93 customer reviews
  • Amazon Best Sellers Rank: #124,306 in Cell Phones & Accessories (See Top 100 in Cell Phones & Accessories)
  • Product Warranty: For warranty information about this product, please click here

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Customer Reviews

Top Customer Reviews

I previously had an iPhone 3G, I loved that phone but it broke and I wasn't ready to sign a new contract so I moved to Virgin Mobiles Optimus V. I liked that phone as it was my first step into the android world. I then bought (and returned) a Motorola Triumph which was supposed to be a good phone but it failed. I then finally decided to step up to the Galaxy S2 and while it's only been a few days I'm very pleased.

Battery life:
I started my day out yesterday around 5:30 am, as I drove to work I had a video podcast playing on the phone and that ran for around 30 minutes during my commute. I got to work and then started playing a little with the phone but mainly using it for web browsing and listening to Audio the remainder of the day. I did play some words with friends, downloaded a few new apps from the market and showed off the phone and by 1:30 pm I was at 60% battery life. Not bad to only use 40% in 8 hours. At that rate it's approx 5% battery per hour which tells me I can run this thing just like I was for approx 20 hours without it dying on me. This was PRE any optimization, I had wifi on, data on, etc.

As for charging the phone, it seemed to charge just fine. I read other reviews where it was taking a long time to charge. I think it took the normal amount of time. That being said I was using a wall charger that came with the phone. If you charge via computer USB port it will take a bit longer.

It's plastic and glass, no doubt about it but it is extremely lightweight but doesn't feel cheap. Samsung did a great job making this feel solid even though it is literally pencil thin. I don't have any issues with light leak or anything so far with the construction. Some people bash the back battery cover which is a thin plastic cover.
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6 Comments 244 of 257 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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After being an iPhone / iOS user for a year and a half and as an Android / Atrix user for only 6 months (thankfully without a contract extension), I used that saved upgrade subsidy on getting a SGS2. After following the rave reviews overseas about it, and after enjoying the developer friendly Android OS, I figured this would be the phone I would use for the next few years. Overall, it is an absolute gem of a phone that has little nuances here and there.

When compared to an Atrix 4G, it's absolutely night and day. All the hype over Samsung's AMOLED Plus screen is no joke. The colors are absolutely brilliant in comparison to Motorola's Pentile display. Moving about the screen is silky smooth, with no lag at all. Going back to the Atrix, you can tell the motion from screen to screen just isn't as sweeping. The camera differences are amazing different, both in pictures and in video. Color in the pictures taken by the SGS2 is just much crisper and deeper, especially with black colors, in comparison to the Atrix. However, I'm not using the full 8 megapixel size, as it's not 8MP Wide. I've stuck to the largest widescreen resolution of 6MP W. The hardware does not disappoint, with most work (loading apps, word docs, flash) being done very fast.

When compared to an iPhone 4S (got to play with my wife's iphone this weekend), this is where you find that it's very evenly matched. Both OS's operate smoothly, their cameras capture great images at 8 MP, their videos are just as well. It's on the configuration side and the battery life that makes the difference. Siri aside, the life on the iPhone 4S will completely outdo the SGS2 by far.
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2 Comments 100 of 106 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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Does Samsung Galaxy S2 beats Iphone 4 or 4S? My answer is Big 'YES'.

I'm using this phone from past 3 weeks and I don;t miss my Iphone at all. Samsung Galaxy S2 is loaded with features and technical specs.Lets differentiate Iphone 4S with Samsung Galaxy S2.

Specs Iphone4/4S Galaxy S2
Processor 800 MHz 1.2 GHz
Core Dual Dual
Memory 512MB 1 GHz
Screen Resolution 960 X 640 480 x 800
Display Ratina Super Amoled +
Back Camera 8MP with flash 8 MP with FLash
Front camera 1.3MP 2 MP
Video recording 1080P(FULL HD) 1080P(Full HD)
Weight 140 Grams 116 Grams
network 3G 4G
Capacity 16GB 16 GB
SD support NO Yes 32GB Micro SD card slot available to expand
Screen Size 3.5inch 4.3 inch
Video format ITUNE limited No conversion required, upload any format directly to phone
(conversion required)

Other features:

Samsung galaxy support animated live wallpapers. E.g It has animated wallpaper which changes animation based on weather. if its cloudy,moving clouds dispalyed on screen, if rain, you will see drops on the screen, if snow then snow flakes falling on animated wallpaper which gives phone very cool looks and so as for night and day.

It has proximity sensor which is very useful when you are on call. Touch screen is not effective on call which means if screen touches on your cheeks its non-responsive and calls wont cut or go on hold. You can disable this feature.

The phone has motion sensor which helps like, if you are in meeting and your call rings, flip the phone with screen down and its on mute. similarly tilt, pan and swing options behave differently .
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1 Comment 32 of 34 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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