Hello everyone! I'm Mike, and I just got myself the iPhone 4S today and so far I'm loving every moment of it. My old phone was a piece of junk called "Samsung Finesse." 
Being new, I kind of have my problems with the iPhone. Mainly it has to do with sharing apps. My brother has a iPad2 and a iPhone 4S, and he already has apps on his iPad2. Mainly, he would like me to use apps by using his Apple I.D.. We do know that one of the ways to transfer apps is by using my bro's Apple I.D. and using it on my phone to get the apps, however, he believes that the games may cause a problem with GameCenter in which we won't be able to play together, but we aren't sure and haven't took the risk yet.
He also lost certain data from transferring apps from his iPad2 to HIS iPhone 4S, such as score data in some games or items.
We would also like to know more about the changes iTunes made to the accounts. From what I recall, he was told to use a e-mail and now his old iTunes I.D. is his e-mail, and it used to just be a name, but no e-mail. Is this something that changed, and why?

Being new, I kind of have my problems with the iPhone. Mainly it has to do with sharing apps. My brother has a iPad2 and a iPhone 4S, and he already has apps on his iPad2. Mainly, he would like me to use apps by using his Apple I.D.. We do know that one of the ways to transfer apps is by using my bro's Apple I.D. and using it on my phone to get the apps, however, he believes that the games may cause a problem with GameCenter in which we won't be able to play together, but we aren't sure and haven't took the risk yet.
He also lost certain data from transferring apps from his iPad2 to HIS iPhone 4S, such as score data in some games or items.
We would also like to know more about the changes iTunes made to the accounts. From what I recall, he was told to use a e-mail and now his old iTunes I.D. is his e-mail, and it used to just be a name, but no e-mail. Is this something that changed, and why?