GPS Issues

Every smartphone has its sets of issues. The iPhone 4 has its antenna problem, the Palm Pre has performance issues, the BlackBerry Torch needs a bit more oomph in the software department, and every Android phone has its own set of strengths/weaknesses. The Epic 4G is no different. In addition to the absolutely horrible battery life, the Epic has a pretty serious GPS issue.

The GPS antenna is not very sensitive and usually has trouble locking onto GPS satellites. This manifests itself in two ways: the phone will take an inordinate amount of time to determine your actual location, and/or it won’t pinpoint your location very accurately.

Sometimes the Epic 4G will lock on perfectly and quickly, but usually it takes several minutes longer than the Nexus One to figure out where you are. Occasionally I even got a ‘location not available’ error while using Google Maps.

Accuracy is also a problem. I don’t think I ever saw horizontal error drop below 30m on the Epic 4G compared to ~3m on the Neuxs One and ~5m on the iPhone 4.


Google Nexus One, 4m error (left) vs. Samsung Epic 4G 30m error (right)

The Epic 4G would usually tell me that my physical location was somewhere down the street while the Nexus One would pin me down at my house. In fact, I got more accurate location tracking when I was connected to a WiFi network.

It’s unclear whether this is purely a software problem or a fundamental antenna design issue ala the iPhone 4. One thing is for sure, if you plan on using GPS location a lot you should avoid the Epic 4G.

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  • dk99 - Tuesday, September 7, 2010 - link

    Why is it so easy to see the pixels on the epic's screen? It seems annoying.

    Look at the first picture on the display page on Anand's article.

    http://images.anandtech.com/reviews/gadgets/Samsun...
  • Anand Lal Shimpi - Tuesday, September 7, 2010 - link

    The camera/lighting plus running the screen at full brightness exaggerates pixel pitch a bit but remember this device has the same resolution as the Nexus One but with a larger screen.

    Take care,
    Anand
  • dk99 - Tuesday, September 7, 2010 - link

    I had a chance to check out an Epic 4g at the local sprint store and compared it to the Evo screen. The pixels were more easily seen on the Epic and it did bother me, but I guess it may not bother others as much.

    Here is a picture from another review site demonstrating the pixels:
    http://www.mobilecrunch.com/wp-content/uploads/201...

    Anand, Thank you for a great website.
  • Aigoo - Tuesday, September 7, 2010 - link

    Pentile RGBG
    http://en.wikipedia.org/wiki/PenTile_matrix_family

    :(
  • pvdw - Tuesday, September 7, 2010 - link

    You mention the problem with jerkiness on Android phones, but I find my Desire is wonderfully smooth. It's almost exactly the same hardware as the Incredible, but with better build quality, and I've found no SMS scrolling problems.

    My Desire is unbranded, so there's no junk from operators like Sprint, etc. installed. Maybe this makes a difference?

    And I manage to easily get a days worth of business use out of it - remote access, phone calls, web, etc. 30 hrs on lighter use.

    I sure would love to have a better gpu, like the Galaxy S, and, more importantly, a screen that I can see in daylight without squinting.
  • joncat - Tuesday, September 7, 2010 - link

    I wouldn't say that the SGX 540 is a waste of hardware today. While there are nowhere near the amount of 3d games that IOS has, there are several high quality titles that run great on the galaxy s. Need for Speed Shift and the Sims 3 HD by EA, NOVA, Sandstorm, Assasin's Creed, Hero of Sparta, Asphalt5, to name a few by Gameloft all run great at native resolution, which can't be said for phones like the EVO and Incredible that run on the Snapdragon SOC.
  • Mumrik - Tuesday, September 7, 2010 - link

    I absolutely love that we're back to using Quake 3 as a GPU performance benchmark.
    It stuck around for a long ass time in the first place and now it's back :-D
  • Mumrik - Tuesday, September 7, 2010 - link

    Anand, is there a reason you don't test standby battery life?
    It's a pretty essential number...

    Even if it prevents you from getting the review up fast, you could always just post the review and add the data later after averaging out 2-3 tests.
  • SomeAudioGuy - Tuesday, September 7, 2010 - link

    Ok, so I've had an Epic 4G for about three weeks now. Battery life is completely on par for any other smartphone in this segment.
    I did switch my background to a darker one (the tent with star trails), but other than that I've done very little to mod the device. I don't even use ATK or juicedefender, and I use the built in auto backlight setting to manage brightness. I did not use any 4G today.

    I pulled the phone off my charger at 7am, it's 4pm now. I streamed two hours of Pandora, made one 30 minute phone call and three 5 minute phone calls. Took three pictures and uploaded them to twitpic, have been using Tuiteur, facebook, and checking email on 4 different gmail accounts (with background sync enabled). Spent five minutes yelping a spot for lunch. Played about 15 minutes worth of games (GalCon Flight Control, and Simple Dice), helped debug a wireless router (which required about 20 minutes of wi-fi use), and just spent the last 5 minutes looking up geocaches in my area.

    My battery is at 35%.

    I would term my use as "moderate".

    There's absolutely nothing wrong with the battery life on the Epic 4G. Nothing at all for a phone this powerful and with a screen this large.

    GPS is a pain, but I find if I turn off GPS throughout the day, and turn it back on before I start an app that requires GPS, i get locks fast enough, and I'm usually down to about 3 meters accurate.

    Maybe it's just the signal in Anand's area, but I've gotten better battery life with both EVO and Epic, and even though we TECHNICALLY don't get 4G in LA, when you find pockets of 4G access we're currently getting 4+Mbps down.

    Lastly if you're going to review a keyboard slider phone, maybe give the phone to someone who isn't quite so lit on iPhones, and likes to use a hardware keyboard? Just a thought? Exactly TWO sentences are spent on what is quite possibly one of the best keyboards on the market today. No small feat considering this is NOT an HTC phone. No mention of the dedicated number row (who really likes pushing a function key)? No comparison to any other hardware keyboards? Really? Nothing?
  • Dane74 - Wednesday, September 8, 2010 - link

    not ot call BS, on your GPS findings butt eh are out of wahck with all the testing using testing applicaitons. There are several serious problems with Epics GPS. And actually a number of them show up becasue of switching the GPS off. Go to XDA, or androidforums and you will see discussions.
    '
    Your 3 meters accurate is Epic fooling you since it has already been shown the Epic is cooking those numbers..

    Look at the pictures published by anantech, or others. Pictures of side by side comparisons showing nubmer of satellites used by the Epic show the serious problem.

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