Awesome,after they closed the Field Stations in Norway,Italy and IG and removed any info pertaining to "loaner phones" from the website,I thought that was no longer an option.As a side note, you still can have them issue you a special "communicator" (phone) to do the missions. We are data-stingy and didn't want to download the app, and use our own battery life. They gave the kids a pretty basic smartphone like you use with Tracfone, and it worked just fine.
Great to know Guests still have that option-Disney should update and reflect that on their site!
They only list "your smartphone".
Your mission, should you choose to accept, begins with signing up online at agentpwsa.com while you’re at Epcot. Then, you’ll use your smartphone to connect with the powers that be at OWCA, aka, "The Agency".