I couldn't find a good thread to put this in so I'll make a new one. I reported my findings in the Nexus 6 section but I think the Nexus 5 section should also know about this.I was able to get Project Fi working on my Nexus 5, with in and outbound voice calls working and LTE data working. However I'm worried about international roaming or Sprint/Tmo/Wifi calling handoffs. I'm not able to verify if that works.According to someone in the Nexus 6 Fi thread they weren't able to activate (or transfer their number) on a Nexus 5. I activated my Project Fi sim on a Nexus 6 and everything was working fine on it. Then I bought a nanosim-to-microsim adapter and put the activated Fi sim in my Nexus 5. I factory wiped my Nexus 5 since I like starting things off clean and setup my gmail account and other settings over WiFi. Then I installed the Project Fi app and opened it. The app activated Project Fi and gave me cell service. Everything so far seems to work fine on my Nexus 5.Oh yea I'm also running the Android M developer preview if that matters.