In order to install the Omnichannel Connector app:
Navigate to the Salesforce AppExchange.
Search for
Sinch Omnichannel Connectorand double-click the appropriate listing.
Click Get It Now.

Populate the form and click Visit Provider. An inquiry that includes the data you provided is sent to Sinch.

A Sinch account manager will contact you and contract you for the Sinch Omnichannel Connector. Once contracted, Sinch will provide you with an installation URL. A Salesforce Marketing Cloud administrator must log in and click the URL. The Omnichannel Connector will be added to your Salesforce Marketing Cloud solution via the app exchange.
The time between form completion and contact with a Sinch account manager may vary.