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Christmas26
User level: Level 1 (4 points)

iPhone 16 pro max rcs goes away when texting someone with a different phone and provider

Every time I text 1 person in my contacts it comes up not sent and the rcs is gone and it ask me to send sms or un encrypted it’s only does it for this person all the time and when I do send it I don’t see the delivered underneath

Posted on Oct 4, 2026 1:59 AM

2 replies

SravanKrA
User level: Level 10 (454,138 points)

Oct 4, 2026 2:09 AM in response to Christmas26

Unlike iMessage, which is Apple’s internet-based messaging service, SMS, MMS, and RCS depend on carrier support and network availability.


If you are texting someone and the RCS option suddenly disappears, leaving only SMS, it generally means that RCS is not currently available for that conversation. This could happen for several reasons:

  • The recipient’s phone, messaging app, or carrier does not support RCS.
  • The recipient may have RCS disabled or may not be registered for RCS.
  • Your carrier may not support RCS for the particular SIM, plan, or network you are using.
  • RCS may be temporarily unavailable because of a carrier or network issue.
  • If you have changed SIMs, carriers, or devices, RCS registration may not yet have been completed.


When RCS is unavailable, the messaging app may automatically fall back to SMS or MMS, depending on the type of message being sent.


So, simply seeing “SMS” instead of “RCS” does not necessarily mean there is a problem with the iPhone. The availability of RCS depends on the compatibility and support on both sides of the conversation, as well as the carrier/network being used.

Originally posted at discussions.apple.com/thread/256370112