What is RCS chat? What the label on your phone means and why it appeared

The short version

• What’s happening: RCS is the newer form of texting used by Android and iPhone. It sends over Wi-Fi or mobile data and adds things like typing indicators and better photos.
• Why now: iPhones gained RCS with iOS 18 in 2024, and end-to-end encryption between iPhone and Android began rolling out in beta on 11 May 2026.
• Should you care: Usually you need do nothing. Whether a chat works, or shows a lock, depends on your software, your carrier and the other person's phone.

What is RCS chat? It’s the modern form of texting, built into the Messages apps on Android and iPhone, and it travels over Wi-Fi or mobile data. The label means your phone is using it for that conversation. It isn’t an error, and usually there’s nothing to fix.

Quick check: are your messages arriving? Then you can stop worrying. If a status looks stuck, or you’re wondering about the lock, the rest of this guide is for you.

What is RCS chat, and why is my phone using it?

RCS stands for Rich Communication Services. The GSMA, the mobile industry’s trade body, describes it as a step up from SMS and MMS, adding typing signals, read confirmations, better handling of media and stronger group chats.

Your phone uses RCS when both ends of a conversation can. When that isn’t possible, it can use an older method instead, which is why two chats on one phone can behave differently.

The label tells you which road your message took. It says nothing about whether you did something wrong.

How it spread

1. 17 Sep 2024The GSMA, the mobile industry's trade body, marks the arrival of RCS on iPhone with iOS 18.
2. 11 May 2026Apple and Google start rolling out end-to-end encrypted RCS in beta, for iOS 26.5 on supported carriers and the latest Google Messages.
3. 18 Sep 2026Apple's Europe list, on the version dated this day, shows 3, BT and EE in the UK with the encrypted RCS (beta) label.
4. 5 Oct 20269to5Mac reports that iOS 27 adds inline replies and full Tapbacks to RCS chats.

Why did RCS suddenly appear on my iPhone?

iPhones gained RCS with iOS 18, in September 2024. Apple says you need iOS 18 and a plan from a carrier that supports it. A carrier is your mobile network or the brand that sells you its service.

So the label may turn up after a software update, or later on when your carrier adds support. The newer features are still arriving: 9to5Mac reported on 5 October 2026 that iOS 27 brings inline replies and full Tapback reactions to these chats.

To see your own setting, go to Settings, Apps, Messages, RCS Messaging. If the option is missing, your line may not have RCS yet. We couldn’t find Apple saying whether RCS starts switched on for every carrier (as of 6 November 2026).

What do the words on my screen mean?

The wording differs between phones, so the table says where each label comes from.

The Android status wording comes from Google’s RCS status list and its troubleshooting page. “RCS chat with [name]” isn’t on those pages; MobileSyrup reported it in February 2023, so your version may differ. The “Encrypted” label comes from Apple’s guide to its three message types. “Waiting for activation” comes from users’ reports, not from Apple.

How is RCS different from SMS and iMessage?

These are three separate systems, and your phone picks between them.

Colours and encryption status are from Apple and Google. Green on an iPhone can mean either RCS or SMS, so colour alone won’t settle which one you’re using.

What does the lock tell me?

A lock means the words in that conversation are scrambled in a way only the two devices can undo. Apple describes the result as messages that can’t be read while they’re moving between devices. Google says the keys live only on the phones involved.

The lock covers the journey, and backups are a separate matter. The Electronic Frontier Foundation points out that chats you back up to the cloud may be stored without that protection unless you’ve turned on the relevant option, which is Advanced Data Protection on iOS. If that matters to you, check your backup settings as well as the chat.

The same group sums up the wider change like this:

Still, this is a significant step forward for the privacy of millions of conversations worldwide.

Thorin Klosowski, Electronic Frontier Foundation, Deeplinks blog, 12 May 2026

This guide explains labels and isn’t security advice. If your privacy needs are serious, get specialist guidance.

Why does my phone say RCS but not encrypted?

A missing lock tells you about one conversation, not your phone: that chat isn’t end-to-end encrypted at the moment. Several things have to line up first:

• Your software. Apple names iOS 26.5 as the requirement. On Android, Google asks for the latest Google Messages.
• Your carrier. It has to support encrypted RCS, and supporting plain RCS isn’t enough.
• The other person’s carrier. Apple says each conversation also relies on your contact’s carrier, so one friend’s chat can show a lock while another’s doesn’t.
• Time. Apple says encryption is on by default and reaches new and existing chats gradually.
• The setting. On iOS 26.5, the End-to-End Encryption (Beta) switch sits in the RCS Messaging settings, so check that it’s on.
• The connection. In Google Messages, the lock goes away if either of you loses RCS, and the chat falls back to SMS if data or Wi-Fi drops. It returns by itself once RCS is back, provided you’re both still on Google Messages.

Google separately says its own RCS service uses transport encryption, which is a different, narrower protection than end-to-end. The practical test stays the same: look for the lock in the chat you care about.

Which carriers support it, and does it work in the UK?

Yes, on some UK networks. This is what Apple’s Europe list, the version dated 18 September 2026, showed when we read it on 6 November 2026:

In the US and Canada, Apple’s list, dated 15 September 2026, showed 23 US and 12 Canadian carriers with the encrypted label, including AT&T, T-Mobile, Verizon, Bell, Rogers and Telus. 9to5Mac’s list of 11 May 2026 had the same numbers.

These lists describe iPhones and can change with any update, so treat the table as a snapshot. No label on a list only means the feature isn’t listed for that provider on that date.

Why is my RCS not working?

Start with which phone you have, because the fixes differ.

On Android, Google’s troubleshooting page suggests these checks:

1. Make Google Messages your default SMS app.
2. Check you have an internet connection and can receive SMS.
3. Update Google Messages and Google Play Services.
4. Look at the status under Messages settings, then RCS chats.

Don’t keep flicking RCS off and on to see if it helps. Google warns against it, because doing so takes you out of your group chats.

If a message fails, you may be offered “SMS with a link” as a resend option. Google notes that this can place your media behind a public link it doesn’t control, so choose a different method if the photo or file is private.

On iPhone, Apple says activation can take a few hours. People often report being stuck on “Waiting for activation”, and we couldn’t find it defined on any Apple page (as of 6 November 2026), so we won’t guess at a cause.

So update iOS and give it that time. Then check your provider against Apple’s list. If it’s listed and the status hasn’t moved, contact the carrier and ask whether RCS is available on your particular plan.

What couldn’t we confirm?

All of this was checked on 6 November 2026, and some of it may move quickly.

• Whether encryption has left beta. Apple’s latest list we read, dated 18 September 2026, still says beta. Check Apple’s carrier list for your region.
• Encrypted RCS on iOS 27. Apple’s support wording still names iOS 26.5, and we found no Apple statement specific to iOS 27. Check the RCS Messaging settings on your own phone.
• Your provider’s position today. The Apple lists we read are dated 15 and 18 September 2026. Check the list, then ask the carrier.
• Encrypted group chats between iPhone and Android. We found no clear Apple statement. Look for the lock in the group itself.

Do I need to do anything?

Usually not. Here’s a short list for the few cases that need a decision:

• Messages arriving normally: leave it alone.
• Status stuck: use the steps above, and be patient before calling your carrier.
• You’d like encryption in a particular chat: look for the lock. Between Apple devices, Apple still points people to iMessage, which has always been end-to-end encrypted.

You don’t need a new phone for any of this if yours already runs a supported version, which is welcome given why laptops and phones have become so expensive.

If the label is the only thing that changed, nothing has gone wrong: your texts simply took a better road.

Our take

RCS is a sensible, overdue repair to texting, and the confusion around it comes from how many parties have to agree before it works. Your phone, your carrier and the other person's setup all get a say. That is why the most useful habit is simply reading the label in front of you, one conversation at a time, rather than assuming all your chats behave alike.

Common questions

Does RCS cost extra?

Google says RCS chats add no cost on Wi-Fi you don't pay for, and that on mobile data the cost follows your data plan. Apple notes that network provider fees may apply on iPhone, so check with your carrier if you're unsure, particularly when roaming.

Is RCS the same as SMS?

No. SMS is the older text system, and RCS runs over Wi-Fi or mobile data with extras such as typing indicators and higher-quality media. In Google Messages, a chat drops to SMS if either person loses their data or Wi-Fi connection.

Does RCS work in the UK?

Yes, on some networks. Apple's Europe list, dated 18 September 2026, shows RCS on iPhone for 3, BT, EE, giffgaff, O2 and Tesco Mobile. Only 3, BT and EE carry the encrypted beta label. Check Apple's list for changes.

Is RCS encrypted?

It depends on the conversation. As of November 2026, end-to-end encryption between iPhone and Android is labelled beta by Apple and needs supported software and carriers. Look for the lock in the chat. SMS and MMS messages aren't end-to-end encrypted.

What is the difference between RCS and iMessage?

iMessage works between Apple devices and is always end-to-end encrypted. RCS is what an iPhone normally uses with non-Apple phones, where the carrier supports it, and its encryption depends on software and carrier support on both sides.

Sources

1. MobileSyrup: Google Messages RCS chat branding, February 2023
2. Apple Support Community: thread on RCS waiting for activation
3. Apple Newsroom: End-to-end encrypted RCS messaging begins rolling out today in beta
4. Google: End-to-end encrypted RCS messaging begins rolling out today for Android and iPhone users
5. Apple Support: What is the difference between iMessage, RCS and SMS/MMS?
6. Apple Support: Turn on RCS messaging on your iPhone
7. Apple Support: Wireless network provider support and features for iPhone in Europe
8. Apple Support: Wireless carrier support and features for iPhone in the United States and Canada
9. Google Messages Help: Turn on RCS chats
10. Google Messages Help: Can't turn on RCS chats
11. Google Messages Help: End-to-end encryption in Google Messages
12. Google Messages Help: RCS chats by Google FAQ
13. Google Messages Help: How RCS chats keep your conversations secure
14. GSMA: RCS now in iOS, a new chapter for mobile messaging
15. Electronic Frontier Foundation: Victory! End-to-End Encrypted RCS Comes to Apple and Android Chats
16. 9to5Mac: iOS 26.5: These carriers offer RCS end-to-end encrypted messaging
17. 9to5Mac: iOS 27 upgrades Messages app with key new features for RCS

Spotted a mistake? Tell us, or read our corrections policy.