Re: Contacts --> SIM card --> ?
North American GSM frequencies (for TMo, AT&T Wireless, Rogers Wireless , etc) are 850 & 1900 MHz. You need both bands, especially 850 MHz for decent building penetration in many cases. Beware not all "Tri-band phone support 850MHz, many just support European 900 & 1800Mhz and only 1900 in North America, hence "tri-band," though there are some Tri-band phones that do support 850 & 1900 MHz. In many cases you'll want a Quad Band phone that does all four (850, 900, 1800, 1900) just to be safe.
You can certainly use a Tri-band phone, you just won't be getting all of the coverage you paid phone with your monthly service.
That's the end of my rant ...
RE: SIM contacts
the limitations of the copy contacts to SIM as detailed by Rcbjr are correct to my knowledge of SIM address book and how it works. I don't like those two downsides (one number per contact -and- you have to manually copy each one to the card). My preference is to put up a beater phone that can Sync to MS Outlook 2003. The SonyEricsson phones (e.g. Z520a) can do this witht he supplied SonyEricsson phone software. Nokia and Motorola phones also have their own tools. I've never gotten the Samsung software to work (YMMV, of course). Then assuming that you BlackBerry <--> MS Outlook sync is current. You can just sync your beater phone to Outlook the same way. that would be my preference.
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