I just bought a unlocked iphone v. 1.1.1. using carrier T-Mobile. I am pretty new to this iPhone enviroment but I am trying to extend my knowledge about it. Currently what I want to do is to install some third party applications in it, and to do so, I realized that i need to have Installer.app.
My question is: Is it OKAY to install the installer.app in the unlocked iphone? or doing that will cause the iphone to be locked again?