If you are using Twilio, you can use this provider in SMS, Voice channel, also in the WhatsApp Channel.
Please note:
WhatsApp channel using Twilio don’t WhatsApp template message, List message, Product Catalog message, WhatsApp Flow.
Take Twilio as an example. On their website, sign up, login in, then you will get to your dashboard:
In your Twilio account, copy the account SID and account Auth Token as per the screenshot below:
Now, go to OCP dashboard, and select Twilio as the provider,
put your copied values in corresponding fields.
click "Save".
click "Add Phone Number" if you are building an SMS or Voice Bot, otherwise, “Add WhatsApp Number”.
Click "Add Number" in area 3 in the above picture after connecting your provider with OCP.
use the plus button to create new a flow.
button 2 is for "Open Flow" of this phone number.
If you are using Twilio for WhatsApp channel as well, then you need to go to WhatsApp senders in Twilio, and then set up below webhook URL.