Apple's iCloud service is a bit of a handful when it comes to settings and interface, but it does come indispensable when you want to backup your phone's content, and then restore it should some unforeseen event happen. Apple gives away 5 GB for free, and then you have tiered pricing for each additional storage amount you might need. Unfortunately, plenty of services count against that quota, including your photo library, emails with attachments, documents with iCloud Drive and general backups of people, messages, apps settings and so on.
It's exactly these general backups that are going rogue after grabbing replacement
iPhone 6s handsets, many users are reporting now. Upon trying to restore their accounts and all the backed info onto the new replacement, they are increasingly finding out that some messages, call logs, and even Safari history and health stats, have simply disappeared.
Some are attributing the bug to the fact that most users that have
iPhone 6s on
iOS 9.1 are getting replacements on iOS 9.0, while others are certain that the backups themselves have been corrupted for some reason. If you don't want to go through the trouble of updating to iOS 9.1 on both handsets, and then resetting the replacement to factory, you can simply back up via iTunes, or use third-party apps as an extra precaution. Apple is apparently aware of the issue, too, and working on a fix.
