So I am on a iPhone 6 Plus on iOS 9.3 beta 3 Public beta. Recently I had problems with the OS so I want to go back to iOS 9.2. The thing is that I synced a backed up my back up but I can not use it for iOS 9.2. Last time I was able to do it now it won't let me. Is there a possible way? Because I don't want to restore to a older back up because I have important stuff on the device now that the older backup does not have.