Placing the volume to its loudest setting, there is a noticeable amount of static noise that can be heard through its earpiece. It goes without saying that it muddies down conversations, but it doesn't help when voices have a mute tone to them. Thankfully though, our callers didn't have any problems in comprehending our natural sounding tones. But when using the speakerphone, its output continues to be distorted, which makes voices sound muffled.

During our testing, we didn't experience any drastic changes in signal strength in the high coverage areas within the greater Philadelphia region. Moreover, it didn't drop any of our test phone calls.

Able to withstand a solid 8 hour work day on normal usage, the battery life of the LG Quantum is pretty average when you consider that it offers a full day for light users. For those power users, don't be too surprised to constantly charge the smartphone whenever the opportunity arises. The manufacturer has it rated for 6 hours of talk and 350 hours of standby time.


If you really despise using touch-only input options, then the selection for Windows Phone 7 devices on AT&T's lineup is primarily limited to the LG Quantum, for right now. However, the inconsistent experience with the platform not being optimized for landscape use can be a hindrance for some. Still, it proves itself to be a decent offering as it accentuates all the core aspects that Windows Phone 7 radiates. Is it by chance a quantum leap over existing devices? Clearly no. But it still personifies a well rounded experience that offers the additional convenience factor of a physical keyboard.

Clearly, if you're on the lookout for a WP7 device on AT&T's lineup, your alternatives to the LG Quantum are the HTC Surround, which has the unique feature of offering a powerful speaker, and the Samsung Focus – also a well-rounded smartphone with a brilliant Super AMOLED screen.

Software version of the reviewed unit: 7.0.7004.0

LG Quantum Video Review:


  • Usable QWERTY keyboard
  • Solid construction


  • Interface not fully optimized for landscape
  • Hard to press shift & function keys

PhoneArena Rating:


User Rating:

6 Reviews

More content with (Quantum)



1. Gjordus unregistered

The update to the Windows Phone 7 OS is supposed to happen tomorrow, and it is going to be a welcome and necessary series of fixes. No copy-paste, no multitasking, no instant messaging (besides MSN, as Microsoft still thinks that people actually use MSN), no homebrew support, a pittance of settings and options, no Flash support, and restriction to a single browser: IE. Facebook contact syncing and Gmail/Google Calendar/Google Contacts support have been a shining diamond of functionality in a miasma of terrible design decisions. I strongly recommend that you actually use the WP7 OS in-store for a good half-hour before you buy a phone running it. Even if this update fixes a lot, the OS currently lacks the development community and basic configurability of either iOS or Android.

2. Sglossy unregistered

Just wondering? I purchased this LG quatum smartphone, can i use this in the philippines and put a different sim card. Is this cellphone unlock? Thanks.
  • Display 3.5" 480 x 800 pixels
  • Camera 5 MP
  • Processor Qualcomm Snapdragon S1, Single core, 1000 MHz
  • Storage 16 GB
  • Battery 1500 mAh(7.00h talk time)

Latest Stories

This copy is for your personal, non-commercial use only. You can order presentation-ready copies for distribution to your colleagues, clients or customers at or use the Reprints & Permissions tool that appears at the bottom of each web page. Visit for samples and additional information.