Apple Push to Replace Qualcomm Chip in iPhone Loses More Ground (1)

Apple Inc. has fallen further behind in its multibillion-dollar effort to make a modem chip for the iPhone, stymied by the complexity of replacing an intricate Qualcomm Inc. component.

After already delaying a plan to have an in-house chip ready by next year, Apple is now likely to miss a goal to ship the component by the spring of 2025, according to people familiar with the situation. That would postpone the release until at least the end of 2025 or early 2026 — the final year of Apple’s recently extended contract with Qualcomm.

The latest snags reflect the daunting task Apple faces in designing its own modem, which ...