iPhone 8 we use all top quality screens. we fix 90% of problems in just 30 minutes. we keep all the stock. we do not use cheap copy parts. As we are top-end repairers we always keep Quality control. we have a low percentage of defected or RMA. From time to time we track and test the quality. we have top-end suppliers on our list. we keep the repair thing so transparent with customers. iPhone 8 screen, battery, charging port, camera, back glass, front glass, liquid damaged, data recovery, the camera lens is broken etc are our daily jobs.