How do I set up my phone with the Grasshopper iPhone app?

First, sign into the Grasshopper app with the same username and password you use to log in online:

Next, enter your iPhone's phone number to register your phone:

Next, select the extension the incoming and outgoing calls should be linked to:

Then, you are presented with options for app permissions. This will allow you to receive push notifications for messages and tests as well as import your contacts.