Having replaced the screen, battery and home button on my 1st gen iPhone SE myself I can confidently say that Apple do not make these easy to repair yourself, and arguably make it more difficult to drive business for their own repair service. Lots of tiny screws requiring particular tools of different lengths that can't be mixed up, lest you permanently damage the phone. Glue that needs to be carefully removed or you risk dangerously damaging the battery. Just look at their repairability scores on iFixit: https://www.ifixit.com/repairability/smartphone-repairabilit... .