I've updated my 5s to 9.3 and have used it for a day and had icloud backup done. Today I decided to do clean 9.3 install through DFU mode but itunes downgraded the iphone to 9.2.1 because apparently Apple pulled the 9.3 update for 5s. Now I can't restore my icloud backup because it requires iOS 9.3. (my last backups were done with 9.3). iPhone6,1_9.3_13E233_Restore.ipsw restore with itunes is not allowed either. So i'm stuck waiting for 9.3 to become available again.