SlVR unlocked cingular compatible?

Hi newbie here. I'm looking at getting a new phone without signing up for a new 2 yr contract with Cingular because the rate I have is better then the new one they offer. Anyway I'm looking at the Slvr L7 and was wondering if I buy one unlocked is there going to be any surprises when I use it with Cingular, ie. will all the functions like text messaging etc work? Also are all the unlocked L7's from Europe? Thanks in advance for any info or suggestions.
Bill

If it is unlocked it should work with any GSM provider. Some things, like Data, MMS, and SMS wont work unless you configure the phone for it. You can do this for free on Cingular's website. As far as compatability, get a phone that has GSM 850 and 1900 and it will work fine in the US. If you will go to Europe get it with 900 and 1800. If you will travel to both, get all frequencies. An excellent place to get a cheaper phone is from ebay. Buy from someone with lots of good feedback.