RCS Vs SMS: Everything You Need To Know

RCS Vs SMS: Everything You Need To Know
Image: Getty Images

Rich Communication Services (RCS) is touted as the messaging system that will, one day, replace SMS. Those with a few grey hairs will remember the early days of SMS when you could only send messages to people on the same network. But once that changed, SMS became a far more useful tool.

RCS is still a carrier specific service but negotiations between the GSMA, which represents carriers and tech companies, suggests we may be moving to a post-SMS future.

RCS adds a bunch of nifty features to the messaging experience. It includes new tools such as read receipts, an indicator of when someone is replying, group messaging and easier transmission of high-resolution images and other media. And if that sounds a lot like services like WhatsApp and iMessage – you’re spot on. But RCS is a carrier based, rather than proprietary, protocol.

Australian Carriers And RCS

In Australia, Telstra already supports RCS. They’ve branded it as Telstra Messaging and says that “as other domestic carriers launch RCS, Telstra will interwork with their services in the same way as SMS & MMS”. However, neither Optus nor Vodafone offer RCS-based services locally yet. At the moment, the only devices RCS/Telstra Messaging supports here are the Samsung Galaxy S7 onward, the Samsung Galaxy Note 8 onward and all Google Pixel phones.

Tech Companies And RCS

Google’s strategy around chat applications is still pretty messy with Allo scheduled for the scrap heap and Hangouts being split into two pieces. The chat part of Hangouts will be given RCS compatibility according to some reports but that may not be good news.

Image: Imgur via Reddit

According to reports, negotiations are underway with Apple to support RCS with a slide from a recent GSMA event published on Reddit suggesting carriers are working with Apple to add RCS support. Of course, whether Apple would want to enable a service that directly competes with iMessage is an interesting question. And with Apple fighting governments around the world over access to encrypted messages it will be interesting to see if they want to support a service that could be, potentially less secure, as government relationships with established telecommunication carriers are quite different to those with tech companies that operate outside the tractional regulatory environments Telstra and its peers work within.

RCS And Security

One of the challenges RCS will face with getting the support of the tech community and users is that it does not support end-to-end encryption. While RCS is

About the Author

Anthony Caruana

Anthony Caruana is a freelance writer focused on consumer tech & information security.


  • Apple supporting RCS wouldn’t directly compete with iMessage I don’t think, it would just be a better fallback for communication with non-Apple devices than SMS.

    • Yep. But let’s remember Apple doesn’t do anything that doesn’t suit them. So they’d need to see the benefit (cash) involved in implementing it. Implementing iMessage-like functionality to non-Apple devices (and doing so with lower security) might need a courageous decision from Apple.

  • Not sure why Telstra would seek to immediately cause market confusion by branding RCS so. The whole success of SMS was that it was cross-network. That’s what made it a cash-cow for them back in the day when networks charged per message.

  • It sounds like this communication system would use data rather than the phone system to transmit messages. I don’t have data turned on with my smartphone unless I specifically need it. I can receive SMS but if someone sends me images or videos via MMS I don’t usually receive it until I turn on data. I’m on a prepaid plan so I can’t afford let the phone use data without me knowing what it is doing. For some reason MMS won’t work over Wi-fi networks.

    I can’t see that the RCS system is any better than what we have at the moment.

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