Apple’s do-it-yourself tools and instructions are far from ideal for most of us. I know this because I broke my phone trying to use them.

« The catastrophe unfolded even though I called in an expert, Shakeel Taiyab, an independent phone repair technician in South San Francisco, for help. After reading Apple’s manuals and trying the tools with me, Mr. Taiyab said he applauded Apple for trying to empower iPhone owners but had a harsh verdict. “They set up the customer to fail,” he said.»