How it works
Channels are attempted in priority order; subsequent sends should respect previous delivery outcomes to prevent duplicates. Rich messaging combines text, media and interactive actions. Available features vary across apps, countries, networks and recipient devices.
Business example
A platform first tries Viber and then switches to SMS if delivery cannot be confirmed.
What to consider
Check device support, sender approval, channel availability and fallback arrangements. Not every recipient will see or interact with a message in the same way.