Most iphones i see many seem to only work with 1 carrier right? Such as virgin mobile has iphone and these iphones only work with virgin mobile? I also read that unlocked phones are very expensive. Im confused about unlocked phones. Are these iphones phones that dont have any brand listed on the actual phone at all? So if you have an iphone that is t mobile, if you want to unlock it and use it to another carrier, you have to go and have it unlocked if you want to use it with att or virgin mobile? What im confused is i always thought for virgin mobile... that phone has to be virgin mobile or am i wrong here? Another thing is for example if i buy an iphone from virgin mobile... will it say virgin mobile on the actual phone like on the bottom of it? Reason is b/c i had an android phone from virgin mobile optimus v and it said virgin mobile on the bottom. Also for unlocking, how much does it cost to unlock a phone? So can someone have an iphone for att and then few months later unlock it and go to t mobile and then few months later on go to virgin mobile? But if you know what carrier you want... then obviously you just go and get the iphone for that carrier and not bother with an unlocked one right?