Will I be able to claim all the money back I paid and how does the 1098-T work?

I don’t switch carriers, so sometimes I buy the phones outright, sometimes I do the monthly payment (there’s no interest). So far my iPhone 8 is plugging along, my husband and son have 5’s. One of my kids is on her 3rd 13 this year, she’s paying for it (so hard on phones).