Does AT&T support RCS?

Yes, AT&T supports RCS. AT&T RCS messaging runs through Google Messages on Android and the Messages app on iPhone, from iOS 18.1 onward. AT&T also carries the end-to-end-encrypted RCS added in iOS 26.5, and it is retiring its own older Advanced Messaging implementation in July 2026, after which every AT&T Android device uses Google Messages for RCS.

AT&T RCS Messaging: Yes, and How to Turn It On

There is nothing to buy and nothing to add to a plan. RCS on AT&T travels over Wi-Fi or mobile data rather than the cellular text channel, so it does not draw on a texting allowance either.

How AT&T RCS messaging reaches your phone

On Android, through Google Messages talking to the Jibe backend that Google operates for most carriers. On iPhone, through Apple's own Messages app, which added RCS in iOS 18.1 in October 2024 and needs the carrier to have enabled it, which AT&T has.

That split is why the two handsets behave slightly differently on the same network. The network is not the variable, the client is.

The Advanced Messaging retirement

AT&T ran its own RCS implementation, branded Advanced Messaging, for years before the industry consolidated on Google's backend. It is being retired in July 2026.

For a customer this is close to invisible: RCS continues, through Google Messages, on the same number and in the same threads. The visible symptom, if there is one, is an Android handset that was carrying RCS in a manufacturer messaging app losing chat features and needing Google Messages set as the default texting app. See the best RCS app for Android.

Turning it on

On Android, open Google Messages, then the profile menu, then Messages settings, then RCS chats, and turn it on. On iPhone, it is Settings, then Apps, then Messages, then RCS Messaging. Either way the phone then registers with the network, which takes anywhere from seconds to a few minutes.

How to turn RCS on and off has both walkthroughs in full.

If RCS is not working on AT&T

Stuck on "Setting up". Registration needs mobile data at least once. Wi-Fi alone often will not complete it. RCS waiting for activation covers the rest.
Working in some threads only. Expected. RCS upgrades a conversation only when both ends have it, and falls back to SMS otherwise.
Missing after a SIM swap or an eSIM transfer. The registration is bound to the line and has to redo the handshake.
Business messages arriving as plain text. That is fallback, not a fault, and it is decided per recipient.

What AT&T support means for business senders

AT&T is one of the three networks that put US RCS reach above 80% of smartphones, which is the number that makes an RCS-first programme worth building at all. A verified sender renders on AT&T handsets the same way it does on the other two, and there is no AT&T-specific registration on top of the standard RBM agent approval.

AT&T's row, including the Advanced Messaging retirement date, sits alongside every other US network in the RCS carrier support tracker.

Key facts

AT&T supports RCS via Google Messages (Android) and Apple Messages (iPhone, iOS 18.1 and later).
AT&T's legacy Advanced Messaging RCS is being retired in July 2026, RCS continues through Google Messages.
AT&T supports encrypted RCS on iPhone (iOS 26.5, 2026).
RCS on AT&T uses data, not the SMS channel, so it does not consume a texting allowance.
No AT&T-specific approval exists for business senders beyond the standard verified RBM agent.

Frequently asked

Does AT&T charge extra for RCS?

No. There is no RCS add-on and nothing to enable on the plan. RCS travels over Wi-Fi or mobile data rather than the cellular text channel, so it draws on data rather than on a texting allowance, which for most plans means it costs nothing noticeable.

What happens to my RCS when AT&T retires Advanced Messaging?

Nothing you have to act on in most cases. RCS continues through Google Messages on the same number and in the same threads. The one visible symptom is an Android handset that was carrying RCS in a manufacturer messaging app, which needs Google Messages set as the default texting app.

Why do some AT&T texts still send as SMS?

Because RCS is decided per conversation. If the person on the other end has not enabled it, or is on a handset or network that cannot take it, the thread stays on SMS and looks exactly as it always did. The same rule applies to business messages, which fall back per recipient.

Does AT&T RCS work on an iPhone?

Yes, from iOS 18.1 onward, in Apple’s own Messages app rather than a separate one. AT&T also supports the end-to-end-encrypted RCS added in iOS 26.5, so a private iPhone-to-Android chat on AT&T can be encrypted where both ends qualify.