Apple currently uses components from Qualcomm in order to keep iPhones capable of using mobile data. However, its senior vice president of hardware technologies has just announced that it intends to replace these modems with one of its own. This may be the next significant move in its in-house ambitions since the conception of the M1 chipset.
https://www.notebookcheck.net/Apple-announces-the-development-of-its-own-cellular-modem.509087.0.html