I want to buy a phone for my grandma for her 80th birthday, but she wants to keep her old phone number. I bought both of my phones from republic, and I was able to keep my existing phone number from a previous AT&T account. Will she be able to keep her existing phone number from a previous phone if i purchase her a new phone from republic? Also, I saw information on republic that said she wouldnt be able to keep the last four digits of her previous number? Is that true? She really needs to keep her old number.