Can an unlocked iphone work on tmobile network?

http://www.t-mobile.com/shop/Phones/cell-phone-detail.aspx?cell-phone=Nokia-5230-Nuron
this is the phone i have. will the data plan on this phone work for the iphone?
http://www.t-mobile.com/shop/addons/services/default.aspx this link shows the data plan i have

If the phone is unlocked through proper means then you can switch networks without loosing any feature. I did my permanent unlock through the remote unlock service from Mobileunlocksolutions.com and did not face any problem.