Apple provides new APIs to third-party developers in the European Union that allow for cellular phone calls and SMS/MMS/RCS messaging in apps.

The new TypeMillennium jailbreak tweak provides a system-wide notification to let you know when someone starts typing iMessages to you.

Send an RCS text from your iPhone to an Android phone after ensuring RCS messaging is supported by your carrier and enabled on your iPhone.

Support for end-to-end encryption for texts between iPhone and Android is coming soon via the Rich Communication Services (RCS) 3.0 protocol.

Apple will add end-to-end encryption (E2EE) support for RCS texting between iPhone and Android later this year.

(via Cult of Mac - Apple news, rumors, reviews and how-tos)

With the second developer beta seed of iOS 18.4, some iPhone users are noticing support for RCS messaging that didn't have it prior.