Step 1: Settings → Organization Integrations → Custom SMS provider → Activate.
Step 2: Select vendor logo (Twilio, Unifonic, etc.).
Step 3: Enter credentials (Account SID/Auth Token or API key) and test
Connection.
Another SMS Gateway:
Step 4: Choose 'Another SMS gateway'.
Step 5: Enter API URL, HTTP method (GET/POST), Auth type (None/Basic/Bearer), Message field name (e.g., 'body'), Destination field name (e.g., 'to'),
Additional fields (e.g., 'api_key').
Step 6: Test connection and click 'Save'.