Sprint is offering this free 1 year unlimited plan (up to Sept 30, 2018) if you switch from another carrier: https://www.sprint.com/en/shop/offers/free-unlimited.html?ECID=vanity:1yearfree My family is looking to switch an iPhone 6, iPhone SE, and a third phone. We have a few of questions: 1) Can anyone share if this offer is legit and their experience upon switching to Sprint's Free 1-Year Plan? 2) Two of our Three phones from AT&T are eligible, we would need to buy a 3rd eligible phone to "bring" with us as requested in this Sprint offer. We were thinking of buying a 3rd eligible phone on eBay. How would we "bring" this third phone when on the eligibility page it requests us to provide an IMEI and phone number (considering that the phone number would not be connected our AT&T to this newly bought 3rd phone because it would not be SIM activated if we just bought it on eBay solely for Sprint)? 3) If we just added 2 lines for now, how easy or hard is it to add a 3rd line later to the free 1-year Sprint plan? It says nobody in-store and many represenatives are not aware of this plan for some reason, so we do not want to have issues and want to somehow create this plan before the offer expires. Hopefully it is as easy as pressing a button on the Sprint account when logged in, but can anyone confirm they did this for the free 1-year Spring plan? Thanks for your help!