Enter your custom domain name in this format: yourcompanydomain.my.salesforce.com and tap "Continue"
Enter your Salesforce username and password and tap "Log In"
*Please note your custom domain page will look different from the example here
**If your custom domain contains double dashes ("--") your iOS devices may convert them into a long dash ("—") with auto-correct. Make sure to double check your custom domain URL before submitting it. If you're having trouble typing the double dash, try to copy your domain address and paste it into the custom domain field.