I’m looking for a mobile phone for my dd. Hoping to get a cheap refurbished one, it will be her first phone. I’m thinking iPhone just because that’s what I have. Does anyone know the best (earliest) model I can buy that won’t stop working as soon as I get it? I was thinking the iPhone 7 but worried as the 6 now won’t run updates that that might only have a year or so left? Or an alternative phone that’s not an iPhone would also be good (I just don’t know much about their models and the order they are in). Thank you.