Hello guys, my friend gave me his Galaxy S4 today and it is a Verizon phone. However, I am on an AT&T network. Is there anything that I need to do prior to using this Verizon Galaxy S4 as my main phone? I hear the phone is already unlocked out of the box but I want to take the necessary steps to make sure this phone will run smoothly on my network.
Also if I wanted to flash a ROM would I be using an AT&T based ROM (although it is a verizon phone) or would I just flash a Verizon based ROM?