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Shielding Not on EVERY 3G iPhone?

S

spinstorm

macrumors 68000
Original poster
Sep 14, 2007
1,645
196
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?
 
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.
 
Yes it does.

http://www.ifixit.com/Guide/First-Look/iPhone3G

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!
 
spinstorm said:
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!
Click to expand...


*facepalms*

It has nothing to do with shielding.
 
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!
 
spinstorm said:
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!
Click to expand...

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

scaredpoet said:
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.
Click to expand...
 
I stand corrected - its 5am here.

I saw but I didn't read lol

a facepalm would wake me up!
 
I was wondering why my iPhone made my phones buzz, but not my Sprint phones. now it makes sense.
 
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