Taken from ---->
www.gbacentral.net/gbadv.html
(scroll down it`s near the bottom)
I heard that people in Japan can access the internet using Game Boys. Will this happen over here?
The Mobile GB adapter allows Game Boy Colors and GBAs to hook up to Nintendo's network using cell phones and lets players challenge each other online.
As for whether this is looking likely to happen anywhere else, I'll be blunt: No. The reason is that, while Japan has a standard for mobile phones, nowhere else does. This means a different adapter would have to be developed for every brand of phone in countries such as the UK or America, as each one is designed completely differently. Unfortunately, there's no way this will ever happen.
Fortunately, there may be other ways of hooking up. "Bluetooth", a communication system planned to become the standard for electronic devices, in which both Nintendo and partners Panasonic are involved, could provide a way of online play, but it's all speculation at the moment. Don't count on it.
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But like all things techy things change....