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General discussion

The antenna of mobile phone.

May 29, 2005 8:38AM PDT

Hi everyone,
Why is it so critical? Is it ? or ? of the wavelength? Once I had one ?not expensive ? GSM cellphone that did not have an external antenna, but it worked well even when I was taking a metro(subway ) in Europe.
I was told most of cell phones in North America had an external antenna (As you saw in the TV serial ?X file?) Is it true? Why?
Thank you for your precious time and advice.
hpc

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