https://wccftech.com/apple-in-house-5g-modem-for-2023-iphones-use-tsmc-4nm-node/

Apple and TSMC are reportedly working to materialize custom 5G modems that could be found in the 2023 iPhone family. Just like Qualcomm’s 5G modems, this one is said to be kept separate from the A-series chipset and will likely tout a great degree of power-efficiency as it is said to be mass produced under TSMC’s 4nm process.

Apple and TSMC are currently observing trial production of the custom 5G modems using the 5nm node, but according to a report from Nikkei, the commercial units are expected to use the more advanced 4nm process, which should deliver major improvements in power efficiency. One would suspect why TSMC is not gravitating to its 3nm process, which is said to enter volume production in the second half of 2022.