Apple’s push to replace the chips inside its devices with homegrown components will include dropping a key Broadcom part in 2025, according to people familiar with the situation, dealing a blow to one of its biggest suppliers.

As part of the shift, Apple also aims to ready its first cellular modem chip by the end of 2024 or early 2025, letting it swap out electronics from Qualcomm, another major chipmaker supplying Apple, said the people, who asked not to be identified because the plans are private. Apple had been previously expected to replace the Qualcomm part as soon as this year, but development snags have pushed back the timeline.

Apple is Broadcom’s largest customer and accounted for about 20% of the chipmaker’s revenue in the last fiscal year, amounting to almost $7 billion. Qualcomm got 22% of its annual sales from the iPhone maker, representing nearly $10 billion, though that company has warned for years that its Apple reliance will wane.