Specs summary


The LG Viper's screen is 4 inches with 480 x 800 pixels resolution.


There is a Dual-core 1.2 GHz processor (CPU).


The phone runs on the Android 2.3 Gingerbread (Update Available: 4.0 Ice Cream Sandwich) operating system (OS).

5+ MP

You can take photos or capture video with the phone's onboard 5+ megapixel camera.

There is also a secondary front facing camera useful for video chat and self portraits.


Internal memory is No. An external, MicroSD, MicroSDHC (up to 32 GB) expansion slot is available for increased storage capacity.


The phone is powered by a Lithium-Ion (Li-Ion), 1700 mAh battery. LG's performance ratings are 12.5 days standby time, 318 minutes (2G).

The LG Viper 4G LTE is the first phone to ride on Sprint's new network, but you're going to have to wait to enjoy that unlimited high-speed data.

- Michael A. Prospero , Laptop Magazine 

Reviews summary

Based on 7 reviews

If you’re a person looking for a reliable 4G-enabled Android smartphone without having to spend too much money, what are your choices? One of the more affordable options is the LG Viper. It’s one of a few CDMA handsets that supports 4G LTE and at release, was available as low as $100 with contract.

Unless you’re after something special or at least a little unique-looking, the Viper is a relatively safe choice for an Android smartphone. It gets many of the basic elements right as it uses a tried and tested candybar design. It measures 12mm thick and weighs just a hair over 140 grams. Despite being fairly compact and extremely portable, it carries a 480x800 pixel 4-inch touchscreen display. And it even has a total of four soft-touch buttons right below the screen. Other external hardware features include a front-facing camera, a 5MP rear camera with LED flash, stereo speakers, a 3.5mm headphone jack, and a microUSB 2.0 port.

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When it comes to wireless features, the Viper has got almost everything covered. It has Bluetooth 3.0 with A2DP, GPS with A-GPS, NFC, and 802.11 b/g/n Wi-Fi. Also, it works with dual-band CDMA networks and supports EV-DO Rev. A and 4G LTE data. So as long as LTE network coverage is available in your area, you’re going to enjoy using the Viper for downloading or Web surfing on the go. But then that’s the thing: 4G still isn’t available everywhere. And outside of that, the Viper doesn’t really have any other distinguishing qualities.

It looks and feels just like many other similarly priced Android handsets. And what’s more, it’s running an older version of the Android software. It is said that an update to one of the most recent versions of Android is in the pipeline, but there’s no clear release date in sight. Most reviewers advise that unless money is an issue, it’s best to look at other 4G-enabled alternatives.

Need to Know: LG Viper

1. Uses a 4-inch 480x800 touchscreen color LCD. (The Good)

2. Supports 4G LTE data. (The Good)

3. Runs an older version of the Android software. (The Bad)

4. Battery life is short. (The Bad)

Reviews (7.2/10 Avg. rating)


It simply lacks the prestige and allure that should accompany a device built to show off a carrier’s new high speed data network

from PhoneArena

Talk about a smartphone that’s named after one of the most poisonous snakes out there, that’s because the LG Viper 4G LTE is missing a vital component that makes up a good chunk of its entirety – a live and robust LTE network! No doubt, we dig its $100 on-contract price point, especially when it’s modest with its hardware specs nowadays, however, it simply lacks the prestige and allure that should accompany a device built to show off a carrier’s new high speed data network. Of course, some will appreciate the eco-friendly initiatives found with it, but in the greater scheme of thi... Full review


Reasonably fast performance and tempting price

from Engadget

A 4G LTE phone for $100 on contract? It's hard to argue with that. No matter how unattractive the design or antiquated the software experience, the Viper is a wise buy for frugal consumers and Sprint loyalists alike. It's not as if the handset's internals aren't up to snuff -- they are -- and whenever Hesse & Co. manage to roll out that Ice Cream Sandwich update, the phone is sure to see some appreciable performance boosts. No, the only major con working against it is the abysmal real-world speeds delivered by the carrier's 3G CDMA network. If you've been wed to Sprint for some time and can... Full review

Android Community

The Viper is a good mid-range device, and a perfect fit for a first time smartphone buyer or someone on a budget

from Android Community

Our initial impressions were quite favorable, after using the new LG Viper 4G LTE for the week we still feel the same way. The Viper is a good mid-range device, and a perfect fit for a first time smartphone buyer or someone on a budget. If you are looking for the best, fastest, or prettiest this isn’t the phone for you — and you might want to wait for the LTE equipped Galaxy Nexus. If you can look past the lower screen resolution, the average at best 3G speeds, and know that LTE will make things considerably faster this is a great buy this summer coming in at only $99. The carrier calls... Full review

Laptop Magazine

The first phone to ride on Sprint's new network, but you're going to have to wait to enjoy that unlimited high-speed data

from Laptop Magazine

Sprint calls the LG Viper "future-proof," since it will be ready to take advantage of Sprint's LTE network once that network is finally rolled out. But depending on where you live, you might not be able to use this phone's best feature until you're well into that two-year contract. So in the meantime, how does it compare with other $99 phones on Sprint? If you can't wait for faster throughput, then we suggest the EVO Design 4G, which has a higher-resolution screen and longer battery life. The LG Lucid on Verizon is another good option, a $79 device that offers LTE speeds today. But if you w... Full review


A reliable, environmentally conscious device with an excellent camera

from Cnet
The LG Viper is ahead of its time -- literally, and not necessarily in a good way. Many of its most attractive features, like 4G LTE and Ice Cream Sandwich OS can't be used at the time of purchase. Aside from that, and a few disappointments with audio quality and processing speeds, the phone is solid in all other aspects. For a midrange device, it has a great camera, sturdy build, and it's a good fit for those who are environmentally conscious... Full review

The LG Viper has a stylish, eco design with a speedy processor, but you may not be able to utilize its 4G LTE speeds any time soon

from PCWorld

The LG Viper is a solid introduction to Sprint’s incoming family of LTE phones—even though there isn’t a Sprint LTE network yet. The Viper might not be a top-of-the-line smartphone, but its dual-core processor keeps it running smoothly, and the camera snaps solid photos. But the Viper seems as if it is jumping the gun a bit. Being stuck on a 3G network with an LTE-capable phone is a little sad; and while Sprint did say the Viper will get the Ice Cream Sandwich upgrade, there’s no telling when that will be. If you don’t mind waiting for Sprint to switch on its LTE network (especial... Full review

PC Magazine

Despite a tough-sounding name, Sprint's first LTE device is a cute-yet-powerful, environmentally friendly phone

from PC Magazine
Welcome to the future: Sprint's LTE future. The LG Viper 4G LTE ($99 with contract) is a great little Android-powered smartphone, and it's the first phone we've tested that supports Sprint's upcoming LTE network, which should bring lightning-fast, unlimited data to most of the nation by 2014. But you aren't buying this phone in 2014. You're buying it in 2012, and that's where you're going to need to think this one through. The Viper has a lot to like, even as a 3G handset, but it's part of a crowded field of excellent smartphones on Sprint... Full review

Darn, there are no reviews yet for this phone.

Prices (Where to Buy)

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Full Specs

Release date April 22, 2012
Regions available USA
800/1900 MHz
SIM Card No
Dual SIM No
Operating System Android 2.3 Gingerbread (Update Available: 4.0 Ice Cream Sandwich)

Compare Android Smartphones

Processor Dual-core 1.2 GHz
Internal Flash Memory
Digital compass No
FlightMode Yes
Hearing Aid Compatible Yes
Noise Cancellation No
SAR Head: 1.05 W/kg
Body: 1.16 W/kg
Languages English
Manufacturer Warranty 1 Year
Accessories Included AC Charger, Manual, Standard Battery
Power & Battery
Type Lithium-Ion (Li-Ion), 1700 mAh
Removable Battery Yes
Wireless Charging Unknown
Fast Charging No
Video Playback Time Unknown
Wi-Fi Surfing Time Unknown
3G Surfing Time Unknown
4G Surfing Time Unknown
Talk Time Up to:
318 minutes (2G)
Standby Time Up to: 12.5 days
Physical Characteristics
Design Type Bar
Multi-Use Smart Phone / PDA Yes
Material Unknown
Colors Black
Dimensions [H x W x D] 11.7 x 6.2 x 1.2 cm
(4.6 x 2.4 x 0.5 in)
Weight 142 grams
(5 ounces)
Water Resistant / Waterproof Unknown
Rugged Design No
IP Rating No
Antenna Type Internal
Changeable Faceplates No
Display / Screen
Type Color
Technology LCD
Colors 16.7 million
Resolution 480 x 800 pixels
Pixel Density Unknown
Size 4 inches
3D No
Secondary Display No
Sensors Ambient Light, Proximity, Motion / Accelerometer
Graphics Yes
Themes No
Backlit Illumination Yes
Zoom / Magnification Yes
Screen Orientation Lock Unknown
Multi Touch No
Fingerprint-Resistant Coating No
Additional Display Features Capacitive touch screen, Multi-touch
Input / Navigation
Sleep / Wake Key Unknown
Home Key Unknown
Mute Key Unknown
Input Type Touchscreen
Navigation Type Touchscreen
Predictive Text Entry Swype
Physical Keyboard Unknown
Voicemail Key Yes
Any Key Answer No
Voice Commands Yes
Keypad / Screen Lock Yes
External Volume Control Yes
External Media Playback Controls No
Fingerprint Sensor No
Call Management
Wi-Fi Calling Unknown
Voice over LTE (VoLTE) Unknown
Contact List Capacity Depends on system memory
Multiple Numbers Per Contact Email address, Other fields
Contact Groups Unknown
Auto Answer No
Voice Activated Dialing Yes
Photo Caller ID Yes
Web / Email / Messaging
Web Browsing Type HTML
Browser Google Android
Javascript Yes
Flash Yes
Email Yes
Email Protocols POP3, IMAP, SMTP, Microsoft Exchange
Additional Email Features No
Messaging Services SMS, MMS
Push-to-talk (PTT) No
USB Micro-USB 2.0
USB OTG Support No
Infrared No
Bluetooth 3.0
Bluetooth Profiles A2DP, AVRCP, BPP, DUN, OPP/FTP, HID, HFP, HSP
WiFi 802.11 b/g/n
WiFi Encryption WPA2
Mobile Hotspot Yes
Expansion Slots Yes
Expansion Slots Info MicroSD, MicroSDHC (up to 32 GB)
PC Synchronization Yes
TV-out No
DLNA Support Yes
UMA Support No
Data Tethering Compatibility Yes
Java Applications No
Brew Applications No
ECML / Digital Wallet Yes
PictBridge No
Main Camera  
Aperture Unknown
Resolution 5+ megapixels
Dual Lens No
Zoom Yes
Flash Yes (LED)
Additional Rear Camera Info Auto focus, Effects, Geotagging, ISO, Self-timer, White balance
Video Recording Formats 3GP / 3GPP, MPEG-4
Video Recording Parameters
Front Camera  
Zoom Unknown
Additional Front Camera Info VGA
Video Recording Parameters
Audio / Video
Audio Playback Yes
Audio Formats MP3, MP4, eAAC+, WMA, WAV
Radio No
Video Playback Yes
Video Playback Formats 3GP / 3GPP, H.264 / AVC, MPEG-4, WMV
Mobile TV No
Streaming Video Yes
External Speakers Yes
Headset Jack 3.5mm
Custom Ringtones No
Vibration Alert Yes
Downloadable Ringtones Yes
Ringtone Composer No
Ringer ID Yes
Haptic Feedback Vibration Yes
Speakerphone Yes
To-Do / Task List No
Calendar Yes
World Clock No
Alarm Yes
Stopwatch No
Timer No
Calculator Yes
Currency Converter No
Document Viewer DOC, DOCX, PDF, PPT, PPTX, XLS
Weather Yes
Stocks No
Maps Yes
Notepad No
Voice Memos / Recorder Yes
Games Downloadable
Apps Downloadable, Pre-installed (Google+, Google Latitude, Play Store, YouTube)
Included Software / Apps No
Additional Comments Other Names (AKA): LG Viper 4G LTE, LG LS840

4GB Micro SD card included
Related Links LG Viper Manual (PDF)
LG Viper Reviews
Where to buy LG Viper
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