A few hours ago I unlocked a Nokia 6010 a friend gave me (Cingular brand) so I can now use it on T-Mobile. I got the free NokiaFree unlocking calculator and on my second attempt (I messed up royally the first time, using the wrong, site-based calculator) successfully removed the restriction from the phone.
Yes, I can unlock other people's GSM (and GSM only) phones as well, at least all GSM phones supported by NokiaFree's software. This includes basically all GSM Nokias, a lot of Samsungs, some LGs, some Panasonics, Sony\Ericssons and some Siemens phones, as well as some lesser-known models like Vitel, NEC and Maxon. Sorry, there aren't any Motorolas on the list; your black Razr stays on Cingular, at least as far as I can help you.
All you have to do is email me (iansl AT gmail DOT com, symbols replaced to kill spam) with the IME1 number of the phone (serial number, can be found under the battery or usually by pressing *#06# like you're entering a phone number), what make\model of phone it is, and what network it's locked to, and what country you're in. I'll send you all seven or so codes, along with my reccommendation of which to choose first, as most GSM phones only let you have 5 or so unlock attempts before they become un-unlockable by this means.
The only thing I ask in return for the unlocking is that if you don't have the latest version of Firefox, take a minute to download, via the link button on the right, it and the Google Toolbar. If you already have Firefox 1.0.7 (or later; I am using Firefox 1.5 Beta right now) then take a little time to click on a few ads that you find intersting. Thanks.