If you have an iOS device and an Itunes account Songs of Innocence is in your purchased section of Itunes for download from iCloud
U2.com subscribers should have had a link emailed
Apple have bought a licence for each individual member of Itunes so go get it now - I am downloading as we speak to listen to in the car on the way home.
https://itunes.apple.com/gb/album/songs-of-innocence/
All the best