Shielding Not on EVERY 3G iPhone?

Discussion in 'iPhone' started by spinstorm, Jul 25, 2008.

  1. spinstorm macrumors 68000

    Sep 14, 2007
    I noticed something very strange tonight.

    I have 2 iPhone 3G's - one is an italian unlocked 8GB and one a locked UK 16GB.

    The 16GB is shielded so that when I get a call I don't get speaker inteference when on my computer like now.

    I thought that was a standard specification on ALL 3G iPhones.

    Then I noticed buzzing coming from my speakers tonight - at first I thought it was another phone I had near the speakers but I removed that and it still happened!

    So I made a call on the unlocked iPhone and it was buzzing the speakers!

    Either - sheilding is NOT standard on all iPhone 3G's and it depends on the country they come from or I have a seriously faulty iPhone 3G!? (although buzzing speakers isn't really a fault lol).

    Has anyone else experienced interference from their iPhone 3G's?
  2. scaredpoet macrumors 604


    Apr 6, 2007
    As far as I know, NONE of the iPhones are shielded in any way. They're phones. They emit RF radiation. That's exactly what they're designed to do.

    If your 3G iPhone is causing speaker buzz, it's because it switched to GSM from 3G. the 3G signal does not exhibit speaker buzz because of the signalling method used (wideband CDMA). The GSM/EDGE signal does buzz because it uses a TDMA based method of transmission.
  3. bep207 macrumors 6502

    Jul 20, 2006
    does the iFixit show shielding in the iPhone autopsy?
  4. spinstorm thread starter macrumors 68000

    Sep 14, 2007
    Yes it does.

    Just scroll down to the end photo of all the parts and it clearly shows and is annotated as the EMI sheilding!

    Now I admit the italian iPhone is unlocked so maybe its hardware is already different (assuming the unlock is not software based that is!) but it seems strange that one is buzzing my speakers and the other is not!

    I think to make this fair we need some people from other countries to comment on if their phones cause buzzing.

    Personally its incredibly annoying when you have two phones which look identical but obviously are not!
  5. scaredpoet macrumors 604


    Apr 6, 2007


    It has nothing to do with shielding.
  6. spinstorm thread starter macrumors 68000

    Sep 14, 2007
    I didn't say the unlock had anything to do with the sheilding - I meant that if the unlock is a difference in hardware then maybe its not a surprise if it lacks that EMI sheilding for some reason!

    I figured it out!

    Another advantage of 3G!

    I had my unlocked phone with 3G turned off - to save battery.

    I turned 3G back on and speaker buzzing no longer happens!

    Learn something new everyday!
  7. View macrumors regular

    Apr 18, 2007
    Isn't that exactly what scaredpoet said??
    Maybe you should learn to read more carefully :)

  8. scaredpoet macrumors 604


    Apr 6, 2007

    I give up. :rolleyes:
  9. sr5878 macrumors 6502a

    Jun 5, 2007
    That's what the people in this thread were trying to tell you.

    Edge = buzz
    3G = no buzz
  10. spinstorm thread starter macrumors 68000

    Sep 14, 2007
    I stand corrected - its 5am here.

    I saw but I didn't read lol

    a facepalm would wake me up!
  11. cheapa55 macrumors 6502a

    Oct 29, 2007
    I was wondering why my iPhone made my phones buzz, but not my Sprint phones. now it makes sense.

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