How do you unlock a phone?
When unlocking the 2 options are just to unlock the Sim so you can use any carrier card but all the software remains the same. The other is to Flash new software that can rebrand a phone say take a T-Mobile branded phone and Brand it Cingy, well all but the stickers.
Unlocking the Sim can be done by sending a text with the unlocking attachment to run on the phone, A Flash has to be done with software adn connected to a Box or PC.
I unlock mine as I use Sims form the UK.
Heck, I think most of us do. lol
I have unlocked many phones a flashed them. It is not hard but you need the right equipment and software to get it done. I have equipmennt to flash adn unlock phones but not seen it on N75 or N95 yet I have the N70 and 73 software. The only other way would be a flash from Nokia and normally they only give that out to vendors.
there are also forums there where you can fin detailed instructions. i have unlocked 6340i's, 3320's, 6101's, 6102's and 6102i's with this software. and it's all free!
http://www.unlocking4u.com/nokia-n75/rs5wp9/ » at reasonable price and unlock it using the unlocking instructions given for your mobile phone from that site itself.