I couldnt believe that still after exactly 1 month i created this topic and the official launch of iOS9 i have issues with taking a f simple icloud backup.... that i have to sign out my icloud, sign back in, turn backup option off, delete current backup and start taking a new backup.... cause when i try to take a simple new backup (also it takes ages to complete) over the current one i still get (1 MONTH LATER) the message that your backup couldnt completed.... OK APPLE YOU ARE OFFICIALY A JOKE ON CLOUD SERVICES.