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Condition: Used: Very Good
Comment: The listing for the LG LS840 Viper in Very Good conditions3 includes the phone, battery, battery door, and compatible wall charger. The is in very good condition, fully functional and ready for use with your Sprint account. The phone may show some evidence of prior use including light hairline scratches or marks that would be expected on a well maintained device.
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LG Viper, Black 8GB (Sprint)

by LG
3.0 out of 5 stars 22 customer reviews
Available from these sellers.
  • Display: 4.0-inches
  • Camera: 5-MP
  • Processor Speed: 1.2 GHz
  • OS: Android 2.3 (Gingerbread)
  • 4G-enabled smartphone with Android 2.3 (Gingerbread) operating system and 4-inch Gorilla Glass touchscreen
  • 1.2 GHz dual-core processor; Wireless-N Wi-Fi networking (with optional Wi-Fi Mobile Hotspot service)
  • 5-MP rear camera and front VGA camera; Bluetooth stereo music; 4 GB memory; corporate and personal e-mail
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4 used from $47.95

Technical Details

  • Size (LWH): 4.65 inches, 2.46 inches, 0.47 inches
  • Weight: 4.96 ounces
  • Network Compatibility: CDMA
  • Minimum Rated Talk Time: 480 minutes
  • Minimum Rated Standby Time: 8 hours
  See more technical details

Product Description

Product Description

The Sprint LG Viper 4G LTE GSM Smartphone features an Android 2.3 operating system with an incredible user interface on its 4" Touchscreen display. Also, this Smartphone comes with 1.2GHz Dual Core processor for ultra-fast and lag-free performance for your multitasking. Also, it possesses MicroSD card slot for storage expansion. Enjoy Cloud storage up to 50GB with this Smartphone, and with its Wi-Fi and 4G technology, connecting to the Internet is as fast as possible.Network Type: CDMA

Combine 4G LTE connectivity speed with the super-fast processor of the LG Viper 4G from Sprint, and you can browse the Web, watch movies and message at warp speed. Running the Android 2.3 (Gingerbread) operating system, the Viper 4G is powered by a 1.2 GHz dual-core processor and features 1 GB of RAM for excellent multitasking. The sleek, ultra-thin smartphone also boasts a 4-inch bright and clear touchscreen display for better viewing under direct sunlight, and it's enhanced by a Corning Gorilla Glass screen protector for extra peace of mind.

Bright 4-inch display with
Gorilla Glass protection (view larger).
LG Viper 4G
At a Glance:

  • 3G/4G LTE connectivity

    Sprint 4G LTE network is available in limited markets.

  • Android 2.3 (Gingerbread)

  • 1.2 GHz dual-core processor

  • 4-inch Gorilla Glass touchscreen

  • 4 GB memory + 4 GB microSD card

  • 5-MP rear camera + VGA front camera

  • GPS navigation

  • Wireless-N Wi-Fi

  • Stereo Bluetooth

  • Personal/corporate e-mail
At a Glance

The Viper 4G also includes dual cameras for easy on-the-go video chats, and it supports NFC and Google Wallet--allowing for swift and smooth transactions at hundreds of thousands of stores nationwide. It is a device with attributes to join the Sprint line-up and boasts UL Environment (ULE) Platinum Certification--the highest level of environmental performance of a device that is recognized by Sprint and ULE.

It runs on Sprint's 4G LTE network, offering simultaneous voice and data connectivity. Additionally, the phone can still connect to 3G data services in areas not currently served by Sprint's 4G LTE network (learn more about Sprint's 4G LTE network below).

Note: Sprint 4G LTE network is available in limited markets.

In addition to the Android OS, the Viper 4G also features Sprint ID, an intuitive way of customizing Android content that enables you to instantly download predefined packs that deliver widgets, ringtones, and wallpapers all at once (learn more below). And you'll be able to enhance your smartphone via Google Play with a selection of over 450,000 additional apps.

The phone also includes Wireless-N Wi-Fi networking plus Mobile Hotspot capability for sharing your 3G/4G connection with up to ten Wi-Fi enabled devices simultaneously. Other features include a 4 GB internal memory, expansion via optional microSD memory cards (a 4 GB card is also included), Bluetooth for hands-free devices and stereo music streaming, GPS for navigation via built-in Google Maps and location-based services, personal and corporate e-mail, and up to 7 hours of talk time (see full specifications below).


The Viper 4G's casing is constructed from 50 percent recycled plastics, and it includes charger with a no-load consumption rating of .03W, which exceeds the EC Code of Conduct on energy efficiency. LG has also eliminated the use of many environmentally sensitive materials in manufacturing the device, including polyvinyl chloride (PVC), brominated flame retardants (BFR), halogen, beryllium, phthalates, and nickel. It's CarbonFree certified to offset the carbon footprint of the phone's full lifecycle and ULE Platinum Certified--the highest level of environmental performance recognized by sustainable requirements established by ULE and Sprint. Finally, the phone comes in fully recyclable packaging that is printed with soy inks, contains up to 87 percent post-consumer paper, and was engineered with a glueless construction.

Vital Statistics

The LG Viper 4G weighs 5 ounces and measures 4.59 x 2.44 x 0.46 inches. Its 1700 mAh lithium-ion battery is rated at up to 7 hours of talk time. It runs on Sprint's 4G LTE network as well as the 800/1900 CDMA/EV-DO Rev. A frequencies.

What's in the Box

LG Viper 4G handset, rechargeable battery, charger, 4 GB microSD memory card, quick start guide

Packed with 1.2 GHz dual-core processor and dual front and rear cameras (view larger).

Sprint's 4G LTE Network

Note: Sprint 4G LTE network is available in limited markets.

Sprint 4G LTE services dramatically increase download speeds for photos, videos and large files. You can download a favorite song, picture, sitcom or large video in seconds, not minutes, or watch live streaming video--all while on the go, not just from the home or office. Additionally, businesses can benefit from the fast connectivity speeds of 4G LTE. Some examples include:

  • Real estate agents can conduct virtual property tours.
  • Construction teams using 4G LTE in the field can save valuable time by sharing schematics with engineers online.
  • Insurance companies can speed their claims management through real-time communication with on-site adjusters.
  • Health care professionals can improve their ability to remotely monitor patients.
  • Emergency first responders can rapidly assess and coordinate disaster action with real-time on-site video and audio.
  • Photojournalists can instantly transfer high-resolution images to the newsroom.

Just a few of the Sprint ID packages.

Sprint ID

Make your phone a reflection of who you are with Sprint ID, which helps you get the most out of your phone by allowing you to choose a total experience for your device. You'll be able to quickly download ID packs that deliver a predefined experience--including applications, widgets, ringtones and wallpapers--all at once. Packs are designed to meet your interests--whether you're a sports fan, fitness fanatic, or auto enthusiast.

And the catalog of Sprint ID experiences will grow and expand--it's a marketplace full of experiences just for you. Choose from a single experience or many--it's about customizing your phone with the information you want in the palm of your hand. Here are a few examples of currently available Sprint ID packs:

  • Entertainment ID: Features a host of fun video, music, photo and news apps including Facebook, Celebrity Tweets, Pandora, Shazam, Rhapsody, E! Online and more.
  • Socially Connected: A customized experience for keeping users connected with friends on-the-go. Pack includes: Facebook, Yahoo! Mail, Gmail, Mashable, Tweetcaster, YouTube, and more.
  • Health and Fitness: Features all the best wellness related resources for eating right, staying fit and tracking users' progress with the ability to customize to their specific interests and goals. Pack includes: Workout Coach, Fitness Tips, Calorie Counter, BMI Calculator and more.
  • Business Productivity: The perfect solution for busy professionals who want to stay connected, entertained and informed on-the-go. This pack features all the best tools to assist with travel plans, organization, communication and more.

Android Gingerbread Operating System

Android Gingerbread

The LG Viper 4G runs the Android 2.3 operating system (dubbed Gingerbread). 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.

The 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 Viper 4G 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 Google Play, 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
  • Google Play 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


  • 4G LTE connectivity (available in limited markets) with simultaneous voice and data capability
  • Wireless-N Wi-Fi networking (802.11b/g/n/a) for accessing home and corporate networks as well as hotspots while on the go.
  • Built-in mobile hotspot functionality allows up to ten Wi-Fi enabled devices to share the 3G or 4G LTE experience on the go with a laptop, camera, music player, game unit, video player, or any other Wi-Fi enabled device.
  • Onboard GPS for navigation and location services
  • Integrated Google Maps with turn-by-turn navigation, street and satellite views.
  • Next-generation Bluetooth 3.0 connectivity provides faster throughput while minimizing on power requirements. includes profiles for communication headset, hands-free car kits, and the A2DP audio streaming Bluetooth profiles.

Communications & Internet

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


  • 1.2 GHz Snapdragon dual core processor
  • 4-inch touchscreen display with Gorilla Glass protection (480 x 800 pixels; 16.7 million colors)
  • Onscreen keyboard
  • Removable battery


  • 4 GB internal memory
  • 4 GB microSD card with support for optional cards up to 32 GB.
  • 1 GB RAM


  • 5-megapixel rear camera with auto focus and flash
  • VGA front camera for video chats


  • Music player compatible with MP3, WMA, and AAC/AAC+/eAAC+
  • Video player compatible with MPEG4, WMV, H.264, H.263


Also Available for This Android Device

Amazon Appstore for Android
Get a great paid app for free every day.

Buy a book once and read it everywhere with our free Kindle Reading App for Android.

Amazon MP3
Shop 15 million songs and stream your Cloud Drive music directly from your Android device.

Find local movie showtimes and TV listings, watch trailers, and search the world's largest source of entertainment information.

Download audiobooks directly to your Android device, then listen wherever you go, get audiobook news, earn badges, and more.

Amazon Mobile
Shop for millions of products, get product details, and read reviews--right from your mobile device.

Wireless Emergency Alerts (WEA), also known as CMAS, is a part of a national alerting system called IPAWS (Integrated Public Alert and Warning System) that enables emergency management officials to rapidly disseminate the warnings and safety information via text alerts to wireless phones based on the phones’ geographic location. The Federal Emergency Management Agency or FEMA is responsible for receiving the alerting information and forwarding the alerts to participating wireless carriers such as Sprint. Such alerts may come from the President of the United States; the National Weather Service, state or county public safety officials. This system is integrated into the same national alerting services that serve television and radio today.

Product Details

  • Product Dimensions: 4.6 x 2.5 x 0.5 inches ; 5 ounces
  • Shipping Weight: 12.8 ounces
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • Item model number: Viper
  • Average Customer Review: 3.0 out of 5 stars 22 customer reviews
  • Amazon Best Sellers Rank: #346,674 in Cell Phones & Accessories (See Top 100 in Cell Phones & Accessories)
  • Product Warranty: For warranty information about this product, please click here
  • Discontinued by manufacturer: Yes
  •  Would you like to give feedback on images or tell us about a lower price?

Customer Questions & Answers

Customer Reviews

Top Customer Reviews

I just got this phone for my wife. I of course set it up and played with it until she ripped it away from my finger tips! I have to say... for a free phone the LG VIPER is just awesome!

As much as I like it you have to keep things in perspective... this IS NOT meant to compete with the super phones like the EVO 4G LTE or the Samsung Galaxy III LTE... or the Google Nexus. It is far above the "entry level" class of phones too! I have to admit, I felt like I was cheating my wife by getting a "free" phone for her... but after using it I feel that I ripped Best Buy for getting the phone free on an upgrade... and trading in her old EVO 4G for a $65 credit! This is by far the best free phone I have ever seen.... and I worked for Sprint as a store manager for 4 years.

So here are some bullet points on why to consider the LG Viper;

* Smallest of the 4G LTE Android phones - For my wife the size of the other LTE phones was a tad bit too big. The size of this phone is perfect for her.
* Speed - This phone hands down "smokes" the EVO 4G that she had. When I was doing updates I was amazed of the speed of the phone. This thing is a fast and powerful as you need!
* Covers the basics well - Good camera, access to the web, facebook, gmail, apps, etc. For the NON TEENAGER... this phone works very well! If you are a a power user (business or teens) then you may want to explore the higher end phones. But if you need a phone for your day to day basics this phone is for you! (and then some!)
* Value - Like I said, I cannot believe that this phone is free. If money is a consideration then look at the LG Viper before dropping $150 to $200 on a larger more powerful handset... then look at this phone and compare the "true" needed features that you will use daily.
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If you are reading this review then you too are looking for good and bad to help sway your purchase. Be sure and write your own review when you decide to buy something to help out other people. As I write this, there are only six reviews For The LG Viper 4G LTE on Amazon so I thought I would add mine.

Purchased the LG Viper two weeks ago on Amazon since they had a discounted price ($0.01) compared to Sprint ($59) with my two year upgrade. I think I am exactly the customer this phone was designed for. I like new technology, but I am not willing to pay $150-200 for a new phone, so when this one came out that was on the 4G LTE network, had a fast processor and great screen, I immediately went looking at reviews. CNET had reviewed it, as well as Endgaget and several others. They all spoke of the green construction and great camera, but it came out in April and was followed by the "high dollar" phones from Samsung and HTC so you didn't hear anything about this phone after that.

The LG Viper 4G LTE is a very nice looking handset that has a lot of amenities. The weight is good and the size is near perfect for me. I may eventually go with a case for it, but currently don't see an immediate need to. Normal use and keeping it in my pocket have not shown any scratches or wear on the exterior. It comes with a 4GB micro SD card so storage has not been a problem. It says it will support a 32GB card if you want to carry all your music with you.

I was upgrading from another LG phone, the Optimus S, so the button layout was the same. It was a change switching for physical buttons to soft keys, but having them in the same place made the transition easy. The extensive use of recycled materials is a nice feature, but doesn't sway me one way or the other.
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2 Comments 21 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
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At $99 at Sprint (sorry Amazon, bought through Sprint), i thought this device would be a 'whatever' simple Android phone. But it's actually speedy and responsive.
The battery life is bad but not worse than other Android phones - which is why i use JuiceDefender (app) to keep my battery lasting all day.

HW quality is solid, though i wish the back cover were rubberized. NFC is cool, takes a while to get used to it and get into the mode of pulling out your phone instead of your wallet.

I'm not gonna hold my breath for Sprint to turn on LTE here in San Diego, so i can't say much about the LTE capabilities BUT as a 3G phone, it's solid.
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I made a review at sprint. Com one week after I recieved it. I have tried to update the review but sprint won't allowed me to alter it or even write a new one.

My newest assessment of this phone sharply contrasts with the old. While I like this phone in general, one major issue, and I mean major!, is the battery life. It is the worst!!!!! You cannot use the phone's functions for half an hour without the battery draining significantly. I spend most the day constantly recharging it.

Now LG has given us an update for the Android os to 4.0 which is great in thought. Now my phone is super buggy, slower than ever in loading anything and I'm also getting dropped calls very often.

I am ready to throw in the towel, pay a ridiculous early termination fee and go elsewhere because it is only a daily source of frustration. Thank you black Friday! You're the perfect opportunity for me to get a great deal on a fabulous HTC phone!
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