Would you replace SMS if your messages could do more than share an update? For example, a customer could tap Track order or Confirm appointment from a message.
RCS can support these kinds of interactive messages on compatible phones. But it is not available on every device or carrier in India, so businesses may still need SMS to reach some customers. This guide explains where RCS can replace SMS, when SMS remains useful, and how businesses can use both channels.
Can RCS fully replace SMS?
No, not completely. RCS can carry richer, more interactive messages than SMS, but customers need a compatible phone, messaging app and mobile network. SMS works through the mobile carrier’s messaging service and can reach phones that do not support RCS. Google advises businesses to use another channel, such as SMS, when a customer’s device cannot receive RCS.
How are RCS and SMS different?
| Feature | RCS | SMS |
| Message format | Can include images, videos, cards and action buttons | Mainly text, with limited interactive features |
| Where messages appear | In a compatible messaging app, such as Google Messages | In the phone’s SMS inbox |
| What customers need | A compatible device, messaging app and network | A phone and mobile service that support SMS |
| Common business use | Interactive updates, confirmations and offers | Simple alerts, reminders and backup messages |
RCS messages use Wi-Fi or mobile data. SMS is provided through a mobile network. RCS can make a message more useful, while SMS can reach customers whose phones or networks do not support RCS.
Where can RCS replace SMS for business?
RCS can take the place of an SMS in situations where customers can receive RCS and would benefit from its interactive features.
- Order and delivery updates: Add a Track order action to a shipping message.
- Appointments and bookings: Let customers confirm or request a change from the message.
- One-time passwords: Send an OTP through RCS where the customer’s device supports it, with SMS available as a backup.
- Product offers: Use branded cards or images to present an offer and let customers tap an action.
These examples are possible uses, not a guarantee that every customer or campaign can receive RCS. Google’s RCS for Business guidance lists OTP, transactional and promotional messages as use cases, with rules that vary by country.
Why does SMS still matter in India?
RCS support varies by device, messaging app, carrier and region. Businesses need to check their customers’ reach before relying on it. Google provides capability checks for this purpose. On iPhone, RCS also requires a supported carrier and iOS 18 or later. Apple’s current carrier support list shows RCS messaging for Reliance Jio in India.
SMS is also useful when a business needs a simpler message to reach customers on phones that cannot receive RCS. It can serve as a fallback if an RCS message cannot be delivered. Google recommends checking delivery status before sending a fallback SMS, to avoid sending the same message twice.
What should Indian businesses check before switching?
Check the rules for each channel. Google requires an RCS business sender, or agent, to have a defined use case. Its current India rules do not include the multi-use category. Promotional RCS agents also have reputation-based message limits and can start conversations only between 7 a.m. and 10 p.m. Review Google’s latest RCS business rules before planning a campaign.
Commercial SMS messages have separate requirements in India. TRAI advises businesses to register as a sender and register headers, message templates and customer consent as required under its framework. Read TRAI’s advice to senders and check the requirements with your telecom provider. Using RCS does not complete the setup needed for commercial SMS if you plan to keep SMS as a fallback.
How can businesses use RCS and SMS together?
A practical approach is to use RCS when a customer’s device can receive it and keep SMS available for customers who cannot.
- Check whether the customer can receive RCS.
- Send an RCS message with useful actions when the device supports them.
- Check the delivery status before sending an SMS fallback.
- Keep an SMS version ready for messages that need broad reach.
This lets businesses use RCS’s richer features without assuming that every customer has access to them.
Conclusion
RCS can replace SMS for selected business messages, especially when customers can receive an interactive update or take an action directly from their messaging app. It cannot yet serve as the only messaging channel for every customer in India. Device and carrier support varies, and businesses need a fallback for messages that RCS cannot deliver. In practice, RCS and SMS can work together: use RCS where it is supported, and keep SMS for reach and continuity.
If your business also manages customer calls, explore CallerDesk’s cloud telephony services.
