Apple is creating its own modem chip for iPhones, which will eventually replace the ones they currently buy from other companies.
This means Apple will have more control over how their devices work and potentially improve battery life and wireless performance.
Don't expect to see this new chip in every iPhone right away, though; Apple will start with some models and gradually roll it out over a few years.
It's a big project for Apple, and while we may not notice much of a difference at first, it could have a big impact on future iPhones.