my son is adding me to his account. can i get a phone and pay for it without it going on his bill

You can buy a phone and it won't go on his bill. Your phone plan will be on his bill.

Yes

Yes , just make them aware of what you want to do, they would not charge his account with any product , without his permission and signature. Just walk in pick out your new phone, and one of there Tech's will transfer your ph no and pics , and saved no's. It only takes about 15 to 20 minutes. All the Verizon employees are very motivated to help you get comfortable with anything new. They are really knowledgeable .

Yes, you can purchase your phone without it showing up on his account, but your monthly payment will be on his account