What is the best way to add 200 new phones of the same type during a new implementation of PureCloud Communicate? I have an assortment of Polycom, AudioCodes, and Generic SIP phones, plus I want every user to have a PureCloud web-based (WebRTC) phone. I don't want to have to create them one-by-one!

I have not used it before, but I know there is a import feature for phones that uses a CSV file to import all the data for your phones at once. It looks like it works with the phones you mentioned above, including the PureCloud web-based (WebRTC) phone. 

Here's the link to a Resource Center article that describes how to do it: https://help.mypurecloud.com/articles/import-phones/