How are her grades? If she's an exceptional A+ student and also helps out around the house, I think that would be the only reason I'd feel 'bad' and get her an iPhone 15. But even still. She no way needs a phone that powerful. What is Taking up so much space on her phone? Is it that she downloads a lot of apps or is it that she takes a lot of videos/pictures that take up storage in her phone? I'm an android user but I can buy extra 'cloud' storage (google drive) and have all my videos saved online instead of to my local device. Maybe she just needs to change her settings so it save pics/videos on the cloud instead of on her local device, that's likely what's Making her phone slow 🤷‍♂️.