Please find the steps below to Configure Slack on the Mobile device.

Step 1: Create a work profile on your Mobile. 
Step 2: Open the Play Store which would be installed already on the work profile.
Step 3: Install Chrome and Slack from the work profile Play Store.
Step 4: Open the Slack.
Step 5: Go to https://capestart.slack.com/signup#/ and “Continue with Google” using CapeStart email.           
            Or            
            Go to the Slack application and click “Sign In To Slack”.
Step 6: Fill the OTP to advance to the next page.
Step 7: Click “Open” from the browser pop-up to redirect to the Slack application.