Alright So once, I had to sync up my iPhone with a friends computer temporarily. Later that month, I bought some stuff on iTunes from my phone, and it asked for the password to his account. I did not have my computer because it was getting fixed, so I checked something on my friends computer when I went over to his house. This site told me that it was fine to buy even if your iPhone was synced to the wrong computer. This turned out to be wrong, but I had trusted it, and now my friend has bills for my purchases. I have my computer back now, but I cannot sync my phone to it now. How can I re-sync my phone to the computer, and can I change the bills from his account to mine? Please help, everything is going wrong right now.