That's interesting. When my mac came to the US with me, I had no issues of 
this. my mac was set up on my friend's network in her home. Hmm, very 
interesting.

On 15 Apr 2010, at 12:20, Dónal Fitzpatrick wrote:

> Hi all,
> 
> I intended to post this months ago and forgot.  On a trip to the States back
> in January I decided to take advantage of the excellent exchange rate and
> buy a 13" MBP.  I saved a fortune I assure you.
> 
> However, on returning home I discovered something I wasn't previously aware
> of.  The wireless card in the US models is actually configured differently
> from those sold in Europe.  The reason is this.  FCC regulations in the
> States means that wireless routers only broadcast on channels 1-11.  In
> Europe, we can broadcast on channels 1-13.  So, wireless cards on Mac
> machines purchased in the US are only set up to operate on channels 1-11.
> All of my routers were configured to broadcast on channel 13, so my nice
> shiny new machine purchased in the US didn't see any of my routers.
> 
> It was a very simple fix to adjust the channels downwards, and all is now
> fine.  However if you go to, say a public WIFI area, or are using your
> machine on a network where you can't control the channel on which the
> wireless signal is broadcast, it might, just might, be a problem for you to
> purchase your machine in the US.  As an aside, for anyone travelling to
> Europe (or Japan) with a US machine, if you can't pick up a wireless signal
> that others can, this could be a reason.
> 
> This may, and probably will, affect only a few people but I pass it on for
> what it's worth.
> 
> Cheers
> 
> Dónal
> 
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