From my conversation with Apple support I spoke with a gentleman and didn't have any answers so I was put through to a supervisor: her: As I was mentioning to the advisor you were speaking with, typically this occurs when an email account is linked to both devices. This email account can also house your contacts as well. me: So his NFC picked up my g mail acct.? her: Yes, I agree. It seems as if the other phone has your email account set up on his phone. The contacts and emails sync from the Gmail account to the phone. It appears that it did pick up on your gmail account. her: You can reset your Gmail password or you can speak with your friend about going to his settings to remove the account. me: It has to have been the NFC though correct?? her: I know that iPhones can communicate with the Androids during setup when switching from an iPhone from an Android but there are specific steps you would have to take in order to get this communication setup. So I went to the other phone and sure enough my e mail was listed in his accounts, and I didn't do anything special to the phone other than to have it too close because I was also entering phone numbers that I have on my phone onto his, and I did not use any cables or change any settings so i'm thinking that when he purchased his phone the nfc feature was turned on.