Anandtech - in depth iphone4 review and signal testing

Discussion in 'iPhone' started by psxguru, Jun 30, 2010.

  1. psxguru macrumors 6502a

    May 19, 2006
  2. br0adband macrumors 6502a


    Aug 29, 2006
  3. nero44 macrumors member

    Jun 28, 2010
    London, UK
  4. maflynn Moderator


    Staff Member

    May 3, 2009
    Good read, anandtech usually has some indepth, technical reviews.
  5. mrcadman macrumors newbie

    Jun 26, 2010
    Excellent article and worth the time, at LEAST thru the antenna portion. The remaining benchmarks and whatnot were interesting as well.
    Gotta admit, i like their stance on what should be done for the fix.

    Funny, i was in the AT&T store yesterday and their two display phones dropped all bars with the slightest touch on the left gap. I feel a bit more at ease after reading GRC's comments, the AntennaSys Blog, and now the very thorough Anandtech Review.
    Maybe some others here could do the same method to get true signal numbers and post their results as well?
    I must say i really DO find it suspect that Apple removed any meaningful way to see the actual signal and also was quite prepared with bands. They wouldn't have bothered to remove it unless it was d**ming. I really doubt that was a simple "oopsy"

    Because we upgraded just a few weeks ago, I only have this very day to make the choice on this 4, or keep my 3Gs. I'm leaning toward 4 with a case.
  6. Igantius macrumors 65816

    Apr 29, 2007
  7. S1njin macrumors 6502a


    May 3, 2010
    This helps explain a lot, especially w/ the bar translation of signal strength and why the results of tapping the bottom left corner is not easily duplicated for everyone. 40% of the signal curve is represented by 5 bars - if you are on the VERY bottom of that curve and tap the bottom left corner, you're going to crater your signal (according to the bars on your phone at least).
  8. barefeats macrumors 65816


    Jul 6, 2000
    Good testing of the signal drop right next to a cell tower:

    Too bad he had to install iOS 3 to get the field test to work. Apple should release the codes that allow a field test of the iPhone 4 (along with a free Bumper).

    Android phones have various signal strength testing apps. One that has a nice design is "Real Signal." It lets you define what signal strength constitutes one, two, ... five bars. And you get two sets of bars -- one for voice and one for data.

    Okay Apple and/or Apple Developers, it's your turn. Give us "Real Signal HD"!
  9. Ferris23 macrumors 68020

    Sep 24, 2007
  10. UCF-ENG macrumors regular

    Jun 7, 2010
    AND if you have five bars you could very likely have such a strong signal that you loose 20+ dbm and not see a drop in bars.

    After reading this I am firmly of the belief that EVERY iPhone 4 is "flawed" and that the "I have no problem with mine" crowd lives in a strong service area.

    Again, I don't think this is something that should stop people from buying and enjoying the phone. But, it is something they should be aware of and something that Apple NEEDS to fix mid-cycle...
  11. Rhonen macrumors member


    Jun 27, 2010
    I am a big fan of Anandtech. Their technical reviews are easy to understand and very indepth. They were the ones who brought to light the issues with SSD's and even had companies asking him for advice/consulting.

    And, as many suspected, it does looks like an inherent flaw in the antenna design. I will believe Anand's evaluation of the issue over the denials and Job's dismissal of it entirely.
  12. S1njin macrumors 6502a


    May 3, 2010
  13. jalpert macrumors 6502

    Jan 30, 2008
    We had 2 iPhone4's, one in my left hand and one in my right. Holding the phone by the notches on the left and right near the bottom of the phone, one phone went down to 1 bar and one phone stayed at full bars.

    I think there are broken phones out there. After a replacement, the phone that went down to 1 bar now stays full, tested in the same place.

  14. asleep macrumors 68040


    Sep 26, 2007
  15. nineohtoo macrumors 6502


    Jun 22, 2009
    SF Bay Area
    This should be stickied.

    and Anandtech is awesome. He convinced me to get an SSD for my MBP, and now he's almost making me want to get a Nexus One. Almost.
  16. grahamnp macrumors 6502a

    Jun 4, 2008
  17. peritusONE macrumors newbie

    Jul 1, 2010
    Yep, Anandtech is awesome. Will have been a member over there for 10 years this October.

    Very awesome, detailed explanation of the antenna issue.
  18. CrackerjacksM88 macrumors member

    Aug 31, 2006
    Does this mean that it is definately a hardware issue? Even though the dBm range is messed up, according to the tests, if you have a dBm signal of -89 or lower, you're screwed since the drop in signal averages around -24.

    If that's the case, I probably won't have any issues (at least in my home) since I get a constant -70 dBm with my Blackberry.

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