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  • LG Quantum C900 Unlocked Phone with Windows 7, QWERTY Keyboard and 5 MP Camera - Unlocked Phone - US Warranty - Black
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LG Quantum C900 Unlocked Phone with Windows 7, QWERTY Keyboard and 5 MP Camera - Unlocked Phone - US Warranty - Black

by LG
| 33 answered questions

Available from these sellers.
  • This unlocked cell phone is compatible with GSM carriers like AT&T and T-Mobile. Not all carrier features may be supported. It will not work with CDMA carriers like Verizon Wireless, Alltel and Sprint
  • 3G-enabled Windows Phone 7 smartphone with 3.5-inch touchscreen and slide-out full QWERTY keyboard
  • Windows Phone 7 OS provides easy access to social networking, personal/corporate e-mail, office apps, Xbox LIVE games, streaming media, and more
  • 5-megapixel camera with HD 720p video capture;16 GB internal memory; Wi-Fi networking; Bluetooth stereo music; GPS for navigation and location services
  • Up to 6 hours of talk time, up to 350 hours (14.5 days) of standby time; released in November, 2010
1 new from $225.00 3 used from $50.00 2 refurbished from $61.95

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Technical Details

  • Size (LWH): 4.7 inches, 0.6 inches, 2.34 inches
  • Weight: 6.08 ounces
  • Minimum Rated Talk Time: 7 hours
  • Minimum Rated Standby Time: 350 hours
  • Battery Type: Lithium Ion
  See more technical details

Product Description

The LG Quantum weighs 6.21 ounces and measures 4.7 x 2.34 x 0.6 inches. Its 1500 mAh lithium-ion battery is rated at up to six hours of talk time, and up to 350 hours (14.5 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 network (850/1900 MHz; HSPA/UMTS) plus international networks (2100 MHz).

Product Details

  • Product Dimensions: 4.7 x 0.6 x 2.3 inches ; 6.1 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
  • ASIN: B005E04JK8
  • Item model number: C900
  • Average Customer Review: 3.5 out of 5 stars  See all reviews (141 customer reviews)
  • Amazon Best Sellers Rank: #149,156 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 Questions & Answers

Customer Reviews

3.5 out of 5 stars

Most Helpful Customer Reviews

56 of 66 people found the following review helpful By K. Tabash on January 23, 2012
Verified Purchase
LG Quantum C900 Unlocked Phone with Windows 7, QWERTY Keyboard and 5 MP Camera - Unlocked Phone - US Warranty - BlackWhat a dissapointment and a waste of time and money! Phone was locked although it was advertised as an unlocked phone. No success getting any assistance from vendor, OEM Planet! Absolutely no customer service. In addition, they blamed Amazon who in turn blamed OEM Planet for sending a locked phone. No assistance from Amazon either. Got the unlocked code from ATT and the directions did not match the prompt from the LG phone. Instead of asking for the unlock code, I asked for the PUK code. Apparently, if you entered the wrong number 5 times, the phone is permanently locked for ATT. What a shame because although I had the unlocked code, I could not unlock it. Maybe the phone was already returned from another customer and I was given a second hand phone? In any case, I am the victim of fasle advertisement - this phone is NOT unlocked. Shame on Amazon and OEM Planet for providing the wrong item to customers and not resolving this issue in a acceptable manner - apparently, I am not the first one and the product is still in the market. Do yourself a favor, do not purchase from OEM Planet. I would have hoped that Amazon would have done the right thing and investigate other's claims and remove that item from their website. This would have avoided others to have such a bad experience.
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31 of 36 people found the following review helpful By P. Kelly on December 26, 2011
Verified Purchase
I bought this for my wife as a replacement to a troublesome Nokia. I was worried after reading recent reviews about it not being unlocked. Thankfully I had no problem and phone works well on a T-Mobile network. Before using the phone I updated all the software for the phone. This took at least 90 minutes. It updated to Windows 7.5. I had to also install Zune software on my PC in order to update the phone and copy over music and photos.

We have T-Mobile and the phone is set up for ATT. It is annoying that the ATT options are still on the menu. Can't get rid of them. I was surprised by the weight of the phone, a lot heavier than an i-phone, but then it cost 75% less.

My wife uses the text option the most, so the slide-out keyboard is a very handy option.

So far this phone is working great.
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11 of 11 people found the following review helpful By ALBERTO BORBON CASTRO on November 16, 2011
Verified Purchase
Moving up from an HTC TyTN II, this Quantum C900 is all I could ask for: thiner, larger, faster, sharper, easier to use and fancier! Just by turning it on I noticed what a big difference it was.

The OS is quite friendly and powerful. Company's Exchange Server sync was perfect since the the start. So far I have no complains regarding Windowsphone. I have not updated it to Windowsphone 7.5 yet, but honestly, do not feel the need to do it...although I will certainly upgrade it. There are not as many Apps at Microsoft's Marketplace as Apple has for the iPhones or iPads: theirs have been around longer..but I was able to get most of what I wanted for free. Other bright side: Apps price is quite low compared to what I have paid before for Palm or even Windows Mobile programs. Hopefuly in a few months I will get the Apps I am now missing.

Hardware wise the phone seems very well built: it feels heavy and sturdy; also fewer moving parts will probably mean less problems down the road. The only thing I do not like is that the phone is an AT&T unlocked phone, not an LG OEM phone: BIG difference when it comes to support: LG will not handle it and neither will AT&T if you are not with them. The seller probably has a warranty agreement with ONE shop...but that certainly limits your options.

Bottom line: Excelent value for money. Would be great if it wasn't an AT&T phone.
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10 of 10 people found the following review helpful By Jeremiah Stoddard on January 30, 2012
Verified Purchase
I purchased this phone from BLUTEKUSA (fulfilled by Amazon), and it indeed came unlocked. I'm currently using it with T-Mobile, though it might be worth mentioning that 3G data isn't available when using this phone with said carrier since the 3G radio works on AT&T's frequencies. To be more concise: if you're using this phone with T-Mobile, you're stuck on EDGE. This isn't a problem for me, since most of my browsing takes place on Wi-Fi networks, with the carrier's data plan being used almost solely for the occassional email.

I'm very impressed with Windows Phone -- I purchased this phone as my introduction to the OS -- which runs smoothly even on the lower-end specs that this phone boasts (particularly 256M of RAM). The OS is friendly, and my subjective perception of its performance is similar to that of the much higher-spec'd iPhones that family members have. Yes, they have some Apps that I'd like, but that's the price for going with the underdog... I particularly love the way the back button works in the OS and the apps, and was frustrated by the lack of it while setting up company email on coworkers' Android phones the other day. You can get spoiled pretty quickly.

The camera takes decent pictures, good enough for the touristy-type photos that I actually take. Someone with an interest in photography might not be impressed; I don't know. For my casual needs it works just fine.

I've never been interested in slide-out keyboards -- they always seemed pointless and kind of silly looking to me -- but I have to admit that it actually is convenient when using Word in landscape mode. In fact, now it's probably going to be disappointing when I upgrade and the choices with landscape keyboards turn out to be limited.

All in all, I'm very impressed with this phone.
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