I went on the Travel-ready center page on the United website, and got this popup:



There is also a button to view this popup on the bottom of the Travel-ready Center page

So basically you can get a free wifi day pass when you upload your documents to the travel-ready center and then check in online on the United website or the United app, which after checking in online you'll get the wifi day pass details via email.

Kinda cool United!

P.S if anyone wants to know - my flight route is TLV-EWR-TLV