WhatsApp and RCS never reach 100% of any customer base- a message sent only through them can silently fail to reach part of your audience. SMS fallback closes that gap automatically.
Official Meta BSP · Google RCS Partner · DLT-Registered · Noida, India
3
Channels, 1 Campaign
100%
Universal SMS Reach
0
Manual Fallback Logic Needed
24×7
Support
Trusted by 10,000+ businesses across India
WhatsApp and RCS are both excellent for rich, high-engagement messaging- but both depend on conditions that not every customer meets. WhatsApp needs the app installed on the recipient's phone and an explicit opt-in. RCS needs an RCS-capable Android device running Google Messages as the default messaging app, and iOS support for RCS is still maturing. A message sent exclusively through either channel simply never arrives for customers outside that coverage- there's no automatic retry unless one is explicitly built into the campaign.
| Channel | Requirement to Receive | Coverage Gap |
|---|---|---|
| App installed AND opt-in given | Customers without the app, or who haven't opted in, are unreachable | |
| RCS | RCS-capable Android device with Google Messages as default app | iOS support is still maturing; non-RCS devices fall outside coverage |
| SMS | Any mobile number | Universal reach- the fallback layer for both channels above |
RCS
SMS
A fallback adds complexity, so reserve it for messages where a miss has a real cost.
Time-critical and transactional- a missed OTP blocks the customer entirely. Almost always needs a fallback.
Customers act on these in real time. A missed update has a real cost- fallback recommended.
Financial confirmations customers rely on for records and trust. Fallback recommended.
Time-sensitive- a missed reminder often means a missed appointment. Fallback recommended.
Lower stakes- a missed promo message costs less than the added complexity of a fallback. Often fine without one.
Not time-critical- customers who miss one update will likely see the next. Fallback usually optional.
There's no fixed universal duration- treat the window length as a business decision based on urgency.
Time-critical messages like OTPs and delivery alerts warrant a short wait; lower-urgency updates can afford a longer one. There's no fixed universal number- it's a business decision based on what's actually being sent.
Fall back once you have a clear non-delivery or non-read result, not just the absence of a response yet- confirm the primary channel actually failed before resending via SMS.
WhatsApp and RCS delivery/read confirmation timing can differ from each other, so tune the window separately for each rather than reusing one setting everywhere.
A rich WhatsApp or RCS message with images, carousels, and tappable buttons doesn't translate directly to SMS- it needs a plain-text equivalent prepared before the campaign launches, not a raw dump of the same content when the fallback triggers.
Instead of manually building fallback logic yourself, Get Click Media's unified platform lets you configure one campaign send with channel priority- WhatsApp or RCS first, SMS as the fallback- and handles the delivery checks and resend automatically.
See how SMS, WhatsApp, and RCS compare on reach and delivery mechanics in our full channel comparison, or build custom fallback logic tied to your own systems with our webhook-based bulk SMS API.
Get Click Media is an official Meta Business Solution Provider, Google RCS partner, and DLT-registered bulk SMS operator based in Noida, running unified WhatsApp, RCS, and SMS campaigns for 10,000+ Indian businesses. Configure channel priority once, and we handle delivery checks and automatic SMS fallback- so time-critical messages reach customers reliably, regardless of which channel they're actually reachable on.
Big or small, we power communication for all- talk to us today.
WhatsApp requires the customer to have the app installed and have opted in, and RCS requires an RCS-capable Android device with Google Messages as the default app (iOS support is still maturing). Neither channel reaches 100% of any customer base, so a message sent only via WhatsApp or RCS silently fails to reach whoever falls outside that channel's coverage- unless you build a retry via SMS.
Get Click Media configures channel priority and automatic SMS fallback across WhatsApp, RCS, and SMS- one campaign, zero manual fallback logic.
