Apple officially rolls out RCS for iPhone, but many carriers still don't support it
Briefly

With the launch of iOS 18, iPhone users can exchange richer messages with Android, but RCS activation depends on individual carrier support, which is still lagging.
RCS allows for larger file attachments, higher-quality photos, audio messages, read receipts, and better group chat functionalities, enhancing communication across platforms.
Major US carriers like AT&T, Verizon, and T-Mobile support RCS, but many regional and MVNOs have not yet adopted the standard, limiting its availability.
Despite Google promoting RCS, the lack of support from Google Fi highlights the ongoing challenges in fully implementing the service for iPhone users.
Read at ZDNET
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